社区应用 最新帖子 精华区 社区服务 会员列表 统计排行 社区论坛任务 迷你宠物
  • 6902阅读
  • 0回复

用Visual C++实现屏幕抓图程序

级别: 终身会员
发帖
3743
铜板
8
人品值
493
贡献值
9
交易币
0
好评度
3746
信誉值
0
金币
0
所在楼道
 在Windows操作系统中,当用户按下"PrintScreen"按钮后,Windows自动将当前屏幕的图像拷贝到系统剪贴板中,这时可以通过"画笔"这个小程序将剪贴板中的内容保存成图像文件,可以看出,如果需要将当前屏幕保存下来还是比较麻烦的,能否可以自己编写一个应用程序,自动将当前屏幕的内容保存到一个图像文件中去呢?这个答案是肯定的,本实例应用程序就是利用通用的热键管理DLL库实现的热键功能,在收到热键通知后截取屏幕的内容并保存到bmp文件中。例如我们设置图片保存路径为c:\,热键为F9 + Control,然后按Change按钮设置好热键,那么当我们按下CTRL+F9后,当前界面将以BMP图像文件的格式被保存在C:\目录下。程序编译运行后的界面效果如图一所示: h|ja67VG  
  kaVYe)~  
  一、实现方法 HK<oNr.d52  
hYh~[Kr^@^  
  热键管理DLL实际上是一个键盘钩子,由它来监视系统的键盘事件。如果有和程序登记符合的按键组合就通知该程序的窗口。为了应用方便,本实例把它做成了一个标准的管理库来为其它的程序通过热键服务,它有两个输出函数:AddHotkey()和DeleteHotkey(),程序只需要调用这两个函数就可以了,如果编译之后不用改变热键,则只需要AddHotkey就可以了。DLL中的所有的全局变量都放在一个共享段中,定义如下: l6!a?C[2T  
{=_xze)  
#pragma data_seg("shareddata") Y 4*?QBYA  
HHOOK hHook =NULL; //钩子句柄 *'R2Lo<C  
UINT nHookCount =0; //挂接的程序数目 >IHf5})R  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 Og kb N`  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 (Jk:Qz5  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey 2_){4+,fu  
static int KeyCount =0; 6/Z 8/PL  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 ,@t#)HV  
#pragma data_seg() LdyE*u_  
=[o/D0-Kn  
  关于共享段,有几点重要的说明:一是必须在链接选项里指定该段为共享:一种方法是在project->settings->link->object/library中加上/section:shareddata,rws;第二种方法是在def文件的sections里加上一句shareddata read write shared;第三种指定共享段的方法在程序里加上一句#pragma comment(linker,"section:shareddata,rws")。二是所有的变量必须初始化,否则链接程序会把它放到普通数据段。三是如果不初始化变量,需要在段外用"__declspec(allocate("shareddata")) 变量类型 变量名"的方式定义。 0*o=JM]  
+ID% (:  
  DLL中的两个输出函数分别用来添加/删除热键,函数代码如下: kYkck]|  
u!cA_,  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR [?#-JIZ3T  
cKey,UCHAR cMask) iD2>-yf  
{ 6 i]B8Ziq{  
 BOOL bAdded=FALSE; #^q@ra  
 for(int index=0;index<MAX_KEY;index++){ b!g8NG  
  if(hCallWnd[index]==0){ I)4NCjcCw  
   hCallWnd[index]=hWnd; V _pKe~  
   HotKey[index]=cKey; 5@~5RNrq2  
   HotKeyMask[index]=cMask; LU@+O12  
   bAdded=TRUE; RTTEAh:.  
   KeyCount++; 'w}/ o+x@  
   break; znd fIt^  
  } '8fL)Zk  
 } ,YmTx  
 return bAdded; )X-TJ+d  
} YCNpJGM  
//删除热键 XwdehyPhT2  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) ys |} ;*  
{ }ABHGr5[  
 BOOL bRemoved=FALSE; #:/-8Z(0  
 for(int index=0;index<MAX_KEY;index++){ Xr pnc 7  
  if(hCallWnd[index]==hWnd){ ,U'E!?=:VS  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ x<{)xP+|  
    hCallWnd[index]=NULL; `d:cq.OO  
    HotKey[index]=0; w~VqdB  
    HotKeyMask[index]=0; oOK&+r7  
    bRemoved=TRUE; 7 *HBb-  
    KeyCount--; (+0yZ7AZ  
    break; wGnFDkCNz  
   } u/L\e.4  
  } )UG<KcdI  
 } MIwkFI8  
 return bRemoved; !,>9?(  
} I`EgR?5 `  
pc<A ,?  
% ck/ Z  
  DLL中的钩子函数如下: <2 S?QgR,  
8BwJWxBQ  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) \+sP<'~M  
{ :KJZo,\  
 BOOL bProcessed=FALSE; /<oBgFMoJ  
 if(HC_ACTION==nCode) G7H'OB &  
 { rfxLCiV  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 )wz3 m L  
   switch(wParam) KmRxbf  
   {  STgYXA(  
    case VK_MENU: QsH Fk5)  
     MaskBits&=~ALTBIT; D$y-Kh  
     break; ziui  
    case VK_CONTROL: ?TVR{e:  
     MaskBits&=~CTRLBIT; `?:X-dh_  
     break; w97B)Kn6  
    case VK_SHIFT: v"G)G)*z  
     MaskBits&=~SHIFTBIT; d/`Q,Vl  
     break; UI.>BZ6}  
    default: //judge the key and send message uSK<{UT~3  
     break; $WK~|+"{>  
   } ~gvw6e*[  
   for(int index=0;index<MAX_KEY;index++){ {F+iL&e)  
    if(hCallWnd[index]==NULL) :HG5{zP  
     continue; rui]_Fn]I  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) -dsE9)&8DX  
    { j /=4f�  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); .[4Dv t|>6  
     bProcessed=TRUE; F^|4nBd*ub  
    } B>W!RyH8o  
   } 2s:$4]K D  
  } }N<> z  
  else if((lParam&0xc000ffff)==1){ //有键按下 G8_|w6  
   switch(wParam) xu7Q^F#u  
   { S?Z"){  
    case VK_MENU: vS'5Lm  
     MaskBits|=ALTBIT; p-o!K\o-1  
     break; L5yv}:.U  
    case VK_CONTROL: \4|o5,+(@  
     MaskBits|=CTRLBIT; VVyms7 VN  
     break; ~!{y3thZ  
    case VK_SHIFT:  MUd 9R  
     MaskBits|=SHIFTBIT; _ -/<bO  
     break; AjA.="3  
    default: //judge the key and send message #q%V|Ajq  
     break; ",qJG]_ <  
   } 9n[ovX 7n!  
   for(int index=0;index<MAX_KEY;index++){ s0x;<si_  
    if(hCallWnd[index]==NULL) #y&O5    
     continue; !*l5%H  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) Sx3R 2-!Z  
    { Qcf5* ]V  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); )j>BvO  
     bProcessed=TRUE; 11 >K\"K}  
    } CA{(x(W\:  
   } COf>H0^%Q  
  } .IJgkP)!]  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 x#_0 6  
   for(int index=0;index<MAX_KEY;index++){ [Vaw$c-+[y  
    if(hCallWnd[index]==NULL) K-b'jP\  
     continue; J#^oUq  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) g x~fZOF_  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam);  9> k-";  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 fer~NlX  
   } o7W1sD1O  
  } =^LX,!2zp{  
 } >AT T<U=  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); V;#bcr=Z<J  
} sjj*7i*  
EFb"{L  
  抓图程序是一个基于对话框的程序,它在建立对话框的时候调用前面的DLL,登记热键,因此需要将hook.lib添加到工程里,在程序里给出两个DLL函数的定义,也可以写个头文件,再包含进来以下代码: (G 3S+T 9  
u9}k^W)E  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); 12,,gwh  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); <>FpvdB  
;,yjkD[mWE  
  为了添加应用程序对热键通知事件的响应,程序中用的办法是重载WindowProc()函数,该函数代码如下: _ X* A  
L'?0*t  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) R2[-Q"|Ra  
{ u \zP`Y  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) hqKftk)+  
 { (\M&Q-xZ  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 ZNEWUt{+;^  
  SaveBmp(); ~Z#jIG<?g  
  return FALSE; g/ict 2!  
 } 9cm9;  
 …… //其它处理及默认处理 5#v|t\ {  
} C`0;  
M@/Hd0$  
(;@\gRL  
  将屏幕图像保存到BMP文件中的任务是由函数SaveBmp()来完成的,具体实现参见代码部分。另外为了顺利实现屏幕抓图,程序中还实现了"托盘"功能,由于这一部分本书在实例中已经专门介绍过了,所以不再赘述,读者朋友可以参考相关实例。 LiF(#OuZ  
S!;:7?mq  
  最后需要提醒读者朋友们注意的是,源程序的编译与使用时要先编译hook.dll并将其放在系统目录(win2000/NT是system32,98/ME是system),然后编译对话框程序运行即可。 V=v7<I=]  
'sCj|=y2Qc  
  二、编程步骤 M[@=m[#a  
AGdFJ>/  
  1、 启动Visual C++,生成一个DLL项目和一个基于对话框的应用程序项目,并将两个项目分别命名为"Hook"和"Capture"; ,y5 7tY  
CF:s@Z+  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; |4@su"OA  
c)tG1|Og]  
  3、 在"Capture"项目中按照图一所示设置对话框的界面,具体设置参见代码部分; # ,KjJ  
71# ipZ  
  4、 使用Class Wizard在"Capture"项目中添加按钮的鼠标单击消息响应函数,并重载对话框的WindowProc()函数; Cd"iaiTD0  
Zh]FL8[ nc  
  5、 添加代码,编译运行程序。 g}B|ZRz+{  
@m=xCg.Z  
三、程序代码 PnKgUJoa0  
_26<}&]b*  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL =R  <X!@  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) /T_ G9zc  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ c= }#8d.  
#if _MSC_VER > 1000 LZB=vc|3/  
#pragma once O*ql!9}E{  
#endif // _MSC_VER > 1000 XOe8(cXa9  
#ifndef __AFXWIN_H__ C;6Nu W  
#error include 'stdafx.h' before including this file for PCH fQ,L~:Y =  
#endif I,@f*o  
#include "resource.h" // main symbols :6*FnKD  
class CHookApp : public CWinApp *)jhhw=34  
{ M;{btu^a  
 public: c9eLNVM  
  CHookApp(); kq SpZoV0'  
  // Overrides Nn_n@K  
  // ClassWizard generated virtual function overrides zNs8yMnFr  
  //{{AFX_VIRTUAL(CHookApp) s]"NqwIPK  
 public: -Pr1 r  
  virtual BOOL InitInstance(); kT+Idu  
  virtual int ExitInstance(); X. =%  
  //}}AFX_VIRTUAL Ae0jfTv  
  //{{AFX_MSG(CHookApp) GuV.7&!x  
  // NOTE - the ClassWizard will add and remove member functions here. ,y+}0q-Ou  
  // DO NOT EDIT what you see in these blocks of generated code ! b5MCOW1+  
  //}}AFX_MSG VqeK~,}  
  DECLARE_MESSAGE_MAP() J ^J$I!  
}; U;7Cmti"  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); M%evk4_27  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); ]R$ u3F  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); I+?9}t  
BOOL InitHotkey(); #xMl<  
BOOL UnInit(); m;S!E-W  
#endif avb'J^}f  
BP6|^Q  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. k-$5H~(PZ  
#include "stdafx.h" LtxeT .  
#include "hook.h" /7nircXj@  
#include <windowsx.h> \=O['#  
#ifdef _DEBUG ;w/|5 ;{A;  
#define new DEBUG_NEW W]]@pbG"H\  
#undef THIS_FILE oM&}akPE  
static char THIS_FILE[] = __FILE__; r{V=)h  
#endif INd:_cT4l  
#define MAX_KEY 100 i58&o@.H<u  
#define CTRLBIT 0x04 Gd:TM]rJ  
#define ALTBIT 0x02 F.s*^}L[  
#define SHIFTBIT 0x01 xb2xl.2x!  
#pragma data_seg("shareddata") KkIxtFM  
HHOOK hHook =NULL; TJHab;7F  
UINT nHookCount =0; \lJCBb+k  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey w&vZ$n-|  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT BP&T|s  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey ]5V=kNu i  
static int KeyCount =0; [ p+]H?(A  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift [IF5Iv\b  
#pragma data_seg() Pp*:rA"N  
HINSTANCE hins; 8gQg#^,(t  
void VerifyWindow(); [O"9OW'2!B  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) ScgaWJ  
//{{AFX_MSG_MAP(CHookApp) xp!M A  
// NOTE - the ClassWizard will add and remove mapping macros here. 56;^ NE4  
// DO NOT EDIT what you see in these blocks of generated code! /Ria"lLv  
//}}AFX_MSG_MAP % Rv ;e  
END_MESSAGE_MAP() /E/Z0<l7  
qSg#:;(O  
CHookApp::CHookApp() ~]MACG:'  
{ &%@b;)]J  
 // TODO: add construction code here, B#>7;xy>  
 // Place all significant initialization in InitInstance Y ,Iv<Hg  
} ju jhK'\  
4=G)j+RCH  
CHookApp theApp; $ ]ew<j  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) y@#JzfY?Hr  
{ _ (U|Kpi  
 BOOL bProcessed=FALSE; ^V1.Y  
 if(HC_ACTION==nCode) =RA8^wI  
 { D%=VhKq  
  if((lParam&0xc0000000)==0xc0000000){// Key up H2ZRUFu  
   switch(wParam) !O`aaLc  
   { > FVBn;1  
    case VK_MENU: {Dc{e5K  
     MaskBits&=~ALTBIT; Io|3zE*<  
     break; >1}RiOd3  
    case VK_CONTROL: 4"om;+\  
     MaskBits&=~CTRLBIT; 88@" +2  
     break; | ODi[~y  
    case VK_SHIFT: FZvh]ZX  
     MaskBits&=~SHIFTBIT; -`I&hzl6E  
     break; B<p-qPR K  
    default: //judge the key and send message b"DV8fdX  
     break; 6T?$m7c  
   } .T2P%Jn.  
   for(int index=0;index<MAX_KEY;index++){ }{R?i,j(  
    if(hCallWnd[index]==NULL) CFLWo1  
     continue; UJ/=RBfkJ  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) wWVLwp4-  
    { %nRz~3X|+v  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); 9JDdOjqo  
     bProcessed=TRUE; ]4uY<9VL  
    } F*}.0SQ  
   } w$aiVOjgT  
  } X6T*?t3!9[  
  else if((lParam&0xc000ffff)==1){ //Key down 8_d>=*(  
   switch(wParam) dR9[K4`p/  
   { m]7oTmS  
    case VK_MENU: n$*e(  
     MaskBits|=ALTBIT; 4x2 ;@Pd  
     break; !08\w@  
    case VK_CONTROL: >FR;Ux~a  
     MaskBits|=CTRLBIT; A-&'/IHR"B  
     break; )YtdU(^J$  
    case VK_SHIFT: ?;bsg 9  
     MaskBits|=SHIFTBIT; ~7G@S&<PK(  
     break; 33M10 1X{6  
    default: //judge the key and send message SHAC(3o /e  
     break; LX!MDZz  
   } "f Ni3 <x]  
   for(int index=0;index<MAX_KEY;index++) S [$Os7  
   { 3pk=c-x  
    if(hCallWnd[index]==NULL) .|VWYN  
     continue; Knjg`f  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) u ? }T)B  
    { *_ U=KpZF  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); R7 WGc[  
     bProcessed=TRUE; "PK`Ca@`v  
    } J)o =0i>*  
   } <`f~Z|/-_(  
  } oEuV&m|yX  
  if(!bProcessed){ ~jpdDV&u\  
   for(int index=0;index<MAX_KEY;index++){ gG,"wzj  
    if(hCallWnd[index]==NULL) ndXUR4  
     continue; Z ? F*Z0y  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) (6Y.|u]bq  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam);  EOn[!  
   } +kj d;u#  
  } ?a]1$>r  
 } OgOs9=cE{  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); k-;A9!^h  
} Y) ig:m]#  
~ Pm[Ud  
BOOL InitHotkey() @hG]Gs[,o  
{ OsGKlWM/  
 if(hHook!=NULL){ dfa^5`_  
  nHookCount++; W]-c`32~S  
  return TRUE; vJ a?5Jr  
 } *#| lhf'  
 else VGVb3@  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); ?r%kif)  
  if(hHook!=NULL) :~ ; 48m  
   nHookCount++; B.oD9 <9  
  return (hHook!=NULL); 6+iZJgwAy  
} gz~)v\5D/  
BOOL UnInit() &~ .n}h&  
{  &$ x1^  
 if(nHookCount>1){ !D!1%@ e  
  nHookCount--; iiWm>yy  
  return TRUE; yQ/E0>Uj!  
 } DOa%|H'P  
 BOOL unhooked = UnhookWindowsHookEx(hHook); ? kBX:(g  
 if(unhooked==TRUE){ B=;p wX  
  nHookCount=0; 7xlarns   
  hHook=NULL; v6#i>n~x,  
 } ^rX5C2}G\D  
 return unhooked; }TDoQ]P  
} fhp+Ep!0Y  
VmbfwHRWb  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) b;~?a#Z}  
{ +p\+ 15  
 BOOL bAdded=FALSE; #$?!P1  
 for(int index=0;index<MAX_KEY;index++){ vyXL F'L  
  if(hCallWnd[index]==0){ U'Mxf'q  
   hCallWnd[index]=hWnd; nu<kx  
   HotKey[index]=cKey; H2iC? cSR  
   HotKeyMask[index]=cMask; 7K`Z<v&*  
   bAdded=TRUE; _enS_R  
   KeyCount++; gc"A Tc  
   break; ebTwU]Nb  
  } Y *?hA'  
 } FDQP|,  
 return bAdded; KrzIL[;2o  
} ZR |n\.  
-SeHz.` N  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) j}F;Bfq!  
{ EjjW%"C,  
 BOOL bRemoved=FALSE; 1(4}rB3  
 for(int index=0;index<MAX_KEY;index++){ :vWixgLg  
  if(hCallWnd[index]==hWnd){ 6qYK"^+xu  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ 1m\ihU  
    hCallWnd[index]=NULL; L_(Y[!  
    HotKey[index]=0; |3K]>Lio  
    HotKeyMask[index]=0; J*zm*~8\  
    bRemoved=TRUE; |k [hk  
    KeyCount--; hha!uD~(  
    break; T{B\1|2w  
   } J!"#N}[  
  } <%ZlJ_cM  
 } U_oei3QP  
 return bRemoved; @Z[XV"w|  
} k>W}9^ cK  
& Do|Hw  
void VerifyWindow() #}8 x  
{ [`/d$V!e  
 for(int i=0;i<MAX_KEY;i++){ KpF/g[m  
  if(hCallWnd!=NULL){ yE=tuHv(0  
   if(!IsWindow(hCallWnd)){ !IAd.<,  
    hCallWnd=NULL; yGZsPQIaV  
    HotKey=0; /~6)Vt  
    HotKeyMask=0; dkI(&/  
    KeyCount--; ELa:yIl0  
   } JM>4m)h#  
  } >DkRl  
 } UkzLUok]U  
} .J fV4!=o  
(|t)MnPfY  
BOOL CHookApp::InitInstance() <HMmsw  
{ =+>^:3cCQ  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); E7AYK&  
 hins=AfxGetInstanceHandle(); -s,guW |  
 InitHotkey(); &O;' ?/4 S  
 return CWinApp::InitInstance(); k.K;7GZC  
} &:}}T=@M1  
2y` :#e`x1  
int CHookApp::ExitInstance() je`w$ ^w  
{ &br_opNi  
 VerifyWindow(); r6 :c<p[c  
 UnInit(); n\'@]qG)Z4  
 return CWinApp::ExitInstance(); whb,2=gIE  
} csCi0'u  
.~jn N  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file p5?8E$VHV  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) rG"QK!R5  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ iD`>Bt7gD  
#if _MSC_VER > 1000 ,.-85isco  
#pragma once jB-wJNP/  
#endif // _MSC_VER > 1000 =Xu(Js-  
eczS(KoL4  
class CCaptureDlg : public CDialog h$#zuqm  
{ g'nN#O  
 // Construction wfY]J0l  
 public: ,`.`}'  
  BOOL bTray; NI)q<@ju  
  BOOL bRegistered; a,~}G'U  
  BOOL RegisterHotkey(); n}!D)Gx  
  UCHAR cKey; 03^?+[C  
  UCHAR cMask; e}bY 9  
  void DeleteIcon(); r>.^4Z@  
  void AddIcon(); Y&y5^nG  
  UINT nCount; 8iKupaaOX  
  void SaveBmp(); 4M3{P  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor S1G=hgF_L  
  // Dialog Data  OYwH$5  
  //{{AFX_DATA(CCaptureDlg) ns;nle|m  
  enum { IDD = IDD_CAPTURE_DIALOG }; IP-}J$$1  
  CComboBox m_Key; jSMs<ox  
  BOOL m_bControl; =[x @BzH  
  BOOL m_bAlt; ;&?l1Vu  
  BOOL m_bShift; ^iz2 =}Q8  
  CString m_Path; w/Ej>OS  
  CString m_Number; h& Q9  
  //}}AFX_DATA O({vHqN>  
  // ClassWizard generated virtual function overrides MsLQ'9%Au  
  //{{AFX_VIRTUAL(CCaptureDlg) t]PO4GA  
 public: UCDvN  
  virtual BOOL PreTranslateMessage(MSG* pMsg); u[yUUYe  
 protected: ?KF.v1w7  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support ]id5jVY  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); zyF[I6Gs  
  //}}AFX_VIRTUAL w 7Y>B`wm?  
  // Implementation 97~*Z|#<+  
 protected: .>bvI1  
  HICON m_hIcon; s\#eD0|  
  // Generated message map functions 1h0cId8d  
  //{{AFX_MSG(CCaptureDlg) -YfpfNt  
  virtual BOOL OnInitDialog(); jm$v0=W9#  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); 5p5S_%R$e  
  afx_msg void OnPaint(); ?Rg8u  
  afx_msg HCURSOR OnQueryDragIcon(); B}A7Usm  
  virtual void OnCancel(); f[$9k}.  
  afx_msg void OnAbout(); dab[x@#r>  
  afx_msg void OnBrowse(); ({l!'>?  
  afx_msg void OnChange(); c N^,-~U  
 //}}AFX_MSG 1> wt  
 DECLARE_MESSAGE_MAP() UB&)U\hn  
}; 2 bQC 2  
#endif {S;/+X,  
}iF"&b0n"  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file \/ 8 V|E  
#include "stdafx.h" Gkq<?q({t  
#include "Capture.h" d}e/f)(  
#include "CaptureDlg.h" J;S@Q/s  
#include <windowsx.h> is,r:  
#pragma comment(lib,"hook.lib") ]/C1pG*o  
#ifdef _DEBUG |=CV.Su  
#define new DEBUG_NEW Tr@}  
#undef THIS_FILE SpG^kI #  
static char THIS_FILE[] = __FILE__; )s';m$  
#endif 9azk(OL6  
#define IDM_SHELL WM_USER+1 wtL_c  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); cr_Q,*  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); rBUdHd9  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; 'G-zJcU  
class CAboutDlg : public CDialog *=O~TY<](  
{ /92m5p  
 public: V9o_Q  
  CAboutDlg(); >kJEa8  
  // Dialog Data h r!Htew4  
  //{{AFX_DATA(CAboutDlg) V/jEMJNks  
  enum { IDD = IDD_ABOUTBOX }; Q<F-l. q   
  //}}AFX_DATA _a3,Zuv  
  // ClassWizard generated virtual function overrides ;2=H7dq  
  //{{AFX_VIRTUAL(CAboutDlg) zXHCP.Rmg  
 protected: d;kdw  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support (8*& 42W  
  //}}AFX_VIRTUAL $A/$M\ :  
  // Implementation k_c8\::p#  
 protected: 2Hp#~cE+.  
  //{{AFX_MSG(CAboutDlg) Zk.LGYz  
  //}}AFX_MSG 'nFqq:2Xa  
  DECLARE_MESSAGE_MAP() ZJxUv {J  
}; (|PxR#{l<  
qq+fUfB2:  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) 3B<$6  
{ j+c<0,Kj  
 //{{AFX_DATA_INIT(CAboutDlg) h6dVT9  
 //}}AFX_DATA_INIT TCd1JF0  
} N?'V,p 0=  
~X/1%  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) Z ?{;|Z5  
{ b%fn1Ag9  
 CDialog::DoDataExchange(pDX); aiKZ$KLC  
 //{{AFX_DATA_MAP(CAboutDlg) |W/_S^C  
 //}}AFX_DATA_MAP N:y3tpG  
} 6BJPQdqSl  
_"PT O&E  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) }cL9`a9j  
 //{{AFX_MSG_MAP(CAboutDlg) L##lXUl  
 // No message handlers U[a;e OLx  
 //}}AFX_MSG_MAP GCUzKf&  
END_MESSAGE_MAP() _:,:U[@Vz  
l(T CF  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) )bqfj>%#c  
: CDialog(CCaptureDlg::IDD, pParent) /Wh} ;YTv^  
{ >g]kbes-\  
 //{{AFX_DATA_INIT(CCaptureDlg) /l,V0+p  
  m_bControl = FALSE; yB7=8 Pcx  
  m_bAlt = FALSE; 'y [eH  
  m_bShift = FALSE; }wh)I]]U  
  m_Path = _T("c:\\"); ^+JpI*,  
  m_Number = _T("0 picture captured."); }/yhwijg  
  nCount=0; 1r?<1vh:z  
  bRegistered=FALSE; |8$x  
  bTray=FALSE; \S)\~>.`y!  
 //}}AFX_DATA_INIT NY'sZTM&  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 (o1*7_]e  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); S3[rv  
} +oZq~2?*S6  
K.Tfu"6  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) ;J~NfL  
{ 1Z +3=$P  
 CDialog::DoDataExchange(pDX); [=Y@Ul  
 //{{AFX_DATA_MAP(CCaptureDlg) g3%Xh0007{  
  DDX_Control(pDX, IDC_KEY, m_Key); k;w1y(  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); `4RraJj>0~  
  DDX_Check(pDX, IDC_ALT, m_bAlt); @N,EoSb :  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); $#g1Mx{  
  DDX_Text(pDX, IDC_PATH, m_Path); <|NP!eMsw8  
  DDX_Text(pDX, IDC_NUMBER, m_Number); 4ey m$UWw  
 //}}AFX_DATA_MAP ;[]{O5TB  
} :!M/9D*}0  
#ra~Yb-F  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) V fJYYR  
//{{AFX_MSG_MAP(CCaptureDlg) coHzbD~#H  
 ON_WM_SYSCOMMAND() )v-sde\  
 ON_WM_PAINT() +-=w`  
 ON_WM_QUERYDRAGICON() +zQ a"Ep*  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) X ?/C9  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) h&+dIk\[3  
 ON_BN_CLICKED(ID_CHANGE, OnChange) Ji_3*(  
//}}AFX_MSG_MAP ] ZGP  
END_MESSAGE_MAP() bu[v[U4  
l@a>"\><i*  
BOOL CCaptureDlg::OnInitDialog() :=BFx"Y  
{ 9Xt5{\PJ  
 CDialog::OnInitDialog(); ErK5iTSD  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); -aDGXQM{~  
 ASSERT(IDM_ABOUTBOX < 0xF000);  u%<Je  
 CMenu* pSysMenu = GetSystemMenu(FALSE); ty|E[Ez1  
 if (pSysMenu != NULL) Ll%CeP  
 { 5Xu2MY=  
  CString strAboutMenu; EX%KfWDr  
  strAboutMenu.LoadString(IDS_ABOUTBOX); _ cK"y2  
  if (!strAboutMenu.IsEmpty()) IcMfZ {H1  
  { [];*9vxW  
   pSysMenu->AppendMenu(MF_SEPARATOR); ab!,)^  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); ?GPTJ#=j=]  
  } Cpu L[|51  
 } t<M^/xe2  
 SetIcon(m_hIcon, TRUE); // Set big icon V,<3uQD9a  
 SetIcon(m_hIcon, FALSE); // Set small icon #1i&!et&/  
 m_Key.SetCurSel(0); 5A,@$yp+  
 RegisterHotkey(); B] dvX  
 CMenu* pMenu=GetSystemMenu(FALSE); GndU}[0J  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); pe>R2<!$  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); R _WP r[P  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); GsG.9nd  
 return TRUE; // return TRUE unless you set the focus to a control !rzbm&@  
} )-q#hY  
dd#=_xe  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) \jDD=ew  
{ Bb2;zOGdA  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) XBE+O7  
 { A*jU&3#  
  CAboutDlg dlgAbout; j:# wt70  
  dlgAbout.DoModal(); `9BZ))Pg  
 } V9*Z  
 else fmf3Hp@  
 { nFU'DZ  
  CDialog::OnSysCommand(nID, lParam); +G';no\h  
 } `iYiAc  
} 0b%"=J2/p.  
{3F;:%$`c  
void CCaptureDlg::OnPaint() 45` i  
{ ~Ts^z(v~D2  
 if (IsIconic()) vt@5Hb)  
 { n$RhD93  
  CPaintDC dc(this); // device context for painting 'thWo wE  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);  n4;  
  // Center icon in client rectangle ?AC flU_k  
  int cxIcon = GetSystemMetrics(SM_CXICON); +eSNwR=  
  int cyIcon = GetSystemMetrics(SM_CYICON); % UDz4?zx  
  CRect rect; kH'LG!O  
  GetClientRect(&rect); I8;xuutc  
  int x = (rect.Width() - cxIcon + 1) / 2; QOA7#H-m9  
  int y = (rect.Height() - cyIcon + 1) / 2; pvdM3+6  
  // Draw the icon !"~x.LX \  
  dc.DrawIcon(x, y, m_hIcon); (jbHV.]P9  
 } d[mmwgSR?I  
 else v?e@`;- <  
 { F?#^wm5TZ  
  CDialog::OnPaint(); ru#,pJ=O(  
 } p4QQ5O$;  
} -FRMal4Pg0  
Y5nj _xQJL  
HCURSOR CCaptureDlg::OnQueryDragIcon() ~NT2QY5!K  
{ eT33&:n4  
 return (HCURSOR) m_hIcon; ZbVo<p5* ]  
} [=k$Q (.3  
1h uU7xuf  
void CCaptureDlg::OnCancel() THC7e>P4  
{ S B2R  
 if(bTray) Fk(nf9M%  
  DeleteIcon(); \1Tu P}P  
  CDialog::OnCancel(); KY5it9e  
} `@%hz%8Y  
G?`{OW3:_  
void CCaptureDlg::OnAbout()  -D*,*L  
{ = F*SAz  
 CAboutDlg dlg; FXMrD,qVg  
 dlg.DoModal(); Qh*"B  
} En01LrC?  
MIa#\tJj  
void CCaptureDlg::OnBrowse() {k BHZ$/  
{ j#:IG/)GL  
 CString str; 7A6Qrfw  
 BROWSEINFO bi; 1dDK(RBbQ  
 char name[MAX_PATH]; AA=zDB<N  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); !1G6ZC:z  
 bi.hwndOwner=GetSafeHwnd(); L@9@3?  
 bi.pszDisplayName=name; og0su  
 bi.lpszTitle="Select folder"; \ZNUt$\  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; yW3!V-iA  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); zt&"K0X|  
 if(idl==NULL) BwpEIV@b]  
  return;  zciL'9  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); :wWPEhK  
 str.ReleaseBuffer(); lICpfcc(+  
 m_Path=str; \! `k:lusa  
 if(str.GetAt(str.GetLength()-1)!='\\') @8\7H'K"\  
  m_Path+="\\"; X#v6v)c  
 UpdateData(FALSE); v_U+wga  
} i2bkgyzB.  
'uy\vR&Pz  
void CCaptureDlg::SaveBmp() ?2d! ^!9  
{ Z`jc*jgy  
 CDC dc; :Vdo.uUa  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); % YgGw:wZ  
 CBitmap bm; *vFXe_.  
 int Width=GetSystemMetrics(SM_CXSCREEN); B\WIoz;'  
 int Height=GetSystemMetrics(SM_CYSCREEN); O4`am:@  
 bm.CreateCompatibleBitmap(&dc,Width,Height); 8d|/^U.w~V  
 CDC tdc; DIAHI V<  
 tdc.CreateCompatibleDC(&dc); +\s32o zg  
 CBitmap*pOld=tdc.SelectObject(&bm); 6gr?#D -F  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); {>EM=ZZfg  
 tdc.SelectObject(pOld); hCpX# rg?  
 BITMAP btm; nDG41)|  
 bm.GetBitmap(&btm); W20qn>{z  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; Qqm$Jl!  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); KOv?p@d  
 BITMAPINFOHEADER bih; @wVq%GG}  
 bih.biBitCount=btm.bmBitsPixel; P5?M"j0/^  
 bih.biClrImportant=0; qoZUX3{  
 bih.biClrUsed=0; 6h5DvSO  
 bih.biCompression=0; $3yzB9\a"  
 bih.biHeight=btm.bmHeight; %imI.6   
 bih.biPlanes=1; 5~ip N/)E  
 bih.biSize=sizeof(BITMAPINFOHEADER); VbU*&{j  
 bih.biSizeImage=size; Nbyc,a[o  
 bih.biWidth=btm.bmWidth; xZ=6  
 bih.biXPelsPerMeter=0;  []L yu  
 bih.biYPelsPerMeter=0; QmiS/`AAv  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); 1uwzo9Yg  
 static int filecount=0; QV%,s!_b  
 CString name; }c]u'a!4  
 name.Format("pict%04d.bmp",filecount++); pnTuYT^%)  
 name=m_Path+name; ?z{Z!Bt?=)  
 BITMAPFILEHEADER bfh; "a T "o  
 bfh.bfReserved1=bfh.bfReserved2=0; tKP zM  
 bfh.bfType=((WORD)('M'<< 8)|'B'); "|,;~k1  
 bfh.bfSize=54+size; T[(4z@d`5  
 bfh.bfOffBits=54; o],z/MPL  
 CFile bf; c.?+rcnq  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ >Hd Pcsl L  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); sjW;Nsp  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); &YpWfY&V  
  bf.WriteHuge(lpData,size); zZE@:P&lf  
  bf.Close(); 8+|7*Ud  
  nCount++; <&CzM"\Em  
 } &sA@!  
 GlobalFreePtr(lpData); Y^(NzN  
 if(nCount==1) Kk9eJ\  
  m_Number.Format("%d picture captured.",nCount); #cCR\$-~  
 else <jz\U7TBf  
  m_Number.Format("%d pictures captured.",nCount); be+]kp  
  UpdateData(FALSE); yN/Uyhq  
} i w(4!,4~  
 b^dBX  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) 9zKbzT]  
{ nW"ml$  
 if(pMsg -> message == WM_KEYDOWN) sry`EkS  
 { Om,M8!E  
  if(pMsg -> wParam == VK_ESCAPE) 5^0K5R6GQf  
   return TRUE; #J w\pOn  
  if(pMsg -> wParam == VK_RETURN) #Zq[.9!q{  
   return TRUE;  \X]  
 } yv+DM`0  
 return CDialog::PreTranslateMessage(pMsg); b&g`AnYT  
} kN8?.V%Utw  
x7!YA>  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) m&I5~kD  
{ q% pjY  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ /4{.J=R}  
  SaveBmp(); egHvI&w"o  
  return FALSE; n[c/L8j  
} &{=`g+4n  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ V|T3blG?D  
 CMenu pop; uc?`,;8{`  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); {!av3Pz\  
 CMenu*pMenu=pop.GetSubMenu(0); $ 0Up.  
 pMenu->SetDefaultItem(ID_EXITICON); s9 .nU  
 CPoint pt; <x->.R_  
 GetCursorPos(&pt); :/6gGU>pu  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); dt1,! sHn  
 if(id==ID_EXITICON) )K>2  
  DeleteIcon(); =5D@~?W ZG  
 else if(id==ID_EXIT) Z.{r%W{2  
  OnCancel(); nep-?7x  
 return FALSE; }DzN-g<K  
} X)^&5;\`  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); MU#$tXmnC  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) \+I+Lrj%  
 AddIcon(); &h67LMD!  
 return res; KOP*\\1 J  
} EwuBL6kN  
67b[T~92o  
void CCaptureDlg::AddIcon() !vwx0  
{ d_!l RQ^N  
 NOTIFYICONDATA data; 1v"r8=Wt  
 data.cbSize=sizeof(NOTIFYICONDATA); \*x=q20  
 CString tip; R3!3TJ  
 tip.LoadString(IDS_ICONTIP); &-B&s.,kj  
 data.hIcon=GetIcon(0); Q!(qL[o  
 data.hWnd=GetSafeHwnd(); (.J8Q  
 strcpy(data.szTip,tip); m=e#1Hs   
 data.uCallbackMessage=IDM_SHELL; C+<z ;9`  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; 63Dm{ 2i}F  
 data.uID=98; N^U<;O?YDW  
 Shell_NotifyIcon(NIM_ADD,&data); $P7G,0-  
 ShowWindow(SW_HIDE); H>Ws)aCq  
 bTray=TRUE; 0ofl,mXW  
} t^(#~hx  
Z`97=:W  
void CCaptureDlg::DeleteIcon() |@lVFEl]  
{ :eR[lR^4*  
 NOTIFYICONDATA data; Mz:t[rfs  
 data.cbSize=sizeof(NOTIFYICONDATA); +E-f  
 data.hWnd=GetSafeHwnd(); WC ZDS>  
 data.uID=98; @ZFU< e$!  
 Shell_NotifyIcon(NIM_DELETE,&data); NX5NE2@^qH  
 ShowWindow(SW_SHOW); B'` jdyaE9  
 SetForegroundWindow(); iT}L9\  
 ShowWindow(SW_SHOWNORMAL); O:86*  
 bTray=FALSE;  U<Z\jT[  
} HZ.Jc"+M  
|&xjuBC  
void CCaptureDlg::OnChange() y |0I3n]e  
{ D-!#TN`Y  
 RegisterHotkey(); y+D"LeCAad  
} 3V2w1CERE  
PdNxuy  
BOOL CCaptureDlg::RegisterHotkey() $v*0 \O  
{ 3NA G}S  
 UpdateData(); 5q>u]n9]  
 UCHAR mask=0; M!E#T-)  
 UCHAR key=0; |Je+y;P7  
 if(m_bControl) M_monj}Z  
  mask|=4; dtT2h>h9  
 if(m_bAlt) ~!G&K`u  
  mask|=2; $h|rd+},  
 if(m_bShift) SjRR8p<   
  mask|=1; !&=%#i  
  key=Key_Table[m_Key.GetCurSel()]; D8I)3cXa'  
 if(bRegistered){ W2 ([vRT  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); O&c~7tM%  
  bRegistered=FALSE; $xsmF?Dsx5  
 } @N0(%o&  
 cMask=mask; {x8UL7{  
 cKey=key; $}/Q%r  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); g :Z, ab4  
 return bRegistered; ]p.eFYDh7  
} T1}9^3T?{  
`'^&* 7,  
  四、小结 [ queXDn"m  
wcI4Y0+J  
  本实例通过一个钩子DLL实现了屏幕抓图的功能,它有一个缺陷,那就是只能保存整个屏幕图像,不过读者朋友可以在此基础上,实现屏幕任意区域的抓图功能,具体方法不再赘述,实现起来很容易的了,呵呵。
评价一下你浏览此帖子的感受

精彩

感动

搞笑

开心

愤怒

无聊

灌水
描述
快速回复

您目前还是游客,请 登录注册
温馨提示:欢迎交流讨论,请勿纯表情、纯引用!
认证码:
验证问题:
10+5=?,请输入中文答案:十五