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
  • 6879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: p^E}%0#  
  FL,av>mV  
  一、实现方法 l'K3)yQEJ  
YFGQPg  
  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: SWrt4G  
,X&(BQj h  
#pragma data_seg("shareddata") T!iRg=<bz  
HHOOK hHook =NULL; //钩子句柄 NV[_XXTv7  
UINT nHookCount =0; //挂接的程序数目 l6AG!8H  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 U&(TqRi,  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 uTX0lu;  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey ranlbxp2l  
static int KeyCount =0; GC<zL }  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 FtEmSKD  
#pragma data_seg() `:4\RcTb/  
[i  ]  
  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。 Q9\6Pn ]T  
HxH.=M8S_  
  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: m9&MTR D\  
#VLO6  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR XW^Sw;[efZ  
cKey,UCHAR cMask) ]Uy cT3A  
{ kY$vPHZpN  
 BOOL bAdded=FALSE; B!z-O*fLE1  
 for(int index=0;index<MAX_KEY;index++){ )=PmHUd  
  if(hCallWnd[index]==0){ !6d6b@Mv  
   hCallWnd[index]=hWnd; {eQ')f  
   HotKey[index]=cKey; pYtvenBy  
   HotKeyMask[index]=cMask; -9L [eYn  
   bAdded=TRUE; /IkSgKJiz\  
   KeyCount++; %.zcE@7*  
   break; WX2w7O'R  
  } J[?7`6\M  
 } ](z?zDk  
 return bAdded; z.xOT;t  
} UImd* ;2TE  
//删除热键 HgY#O r(  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) _F"o0K!u  
{ 'u%;5;%2  
 BOOL bRemoved=FALSE; <f')]  
 for(int index=0;index<MAX_KEY;index++){ >o#^)LN  
  if(hCallWnd[index]==hWnd){ 2&k5X-Y  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ clcj5=:  
    hCallWnd[index]=NULL; DM73 Nn^5  
    HotKey[index]=0; %"1*,g{  
    HotKeyMask[index]=0; MmvMuX]#)  
    bRemoved=TRUE; EE^ N01<"\  
    KeyCount--; cSkJlhwNn  
    break; }'FNGn.~#  
   } C8J3^ ?7E  
  } }I Rx$ cKV  
 } hZudVBn  
 return bRemoved; +( *;F4>  
} )(Z)yz  
6z(eW]p  
#hNp1y2  
  DLL中的钩子函数如下: tSZd0G<A<o  
5GwXZ;(G  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) N?7vcN+-t)  
{ gA&+<SK(  
 BOOL bProcessed=FALSE; x D(RjL+  
 if(HC_ACTION==nCode) Qxvj`Ge  
 { UB4M=R|  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 RgPY,\_9+  
   switch(wParam) Vd'KN2Jm  
   {  #]BpTpRAe<  
    case VK_MENU: c T[.T#I  
     MaskBits&=~ALTBIT; y'a(>s(  
     break; K?4/x4p@  
    case VK_CONTROL: Pdg%:aY  
     MaskBits&=~CTRLBIT; +Yuy%VT  
     break; /j{`hi  
    case VK_SHIFT: S!/N lSr<  
     MaskBits&=~SHIFTBIT; &)8-iO  
     break; Gm]]Z_  
    default: //judge the key and send message @`</Z)  
     break; oQkY@)3.w  
   } g.cD3N  
   for(int index=0;index<MAX_KEY;index++){ #ilU(39e  
    if(hCallWnd[index]==NULL) )bM #s">Y  
     continue; D>YbL0K>X~  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) @\!9dK-W  
    { icX$<lD  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); 6L2Si4OGjG  
     bProcessed=TRUE; vfh0aW-O  
    } \[-z4Fxg|'  
   } LEUD6 M+~t  
  } !*U#,qY  
  else if((lParam&0xc000ffff)==1){ //有键按下 >-~2:d\M3  
   switch(wParam) 0B4&!J  
   { `$X|VAS2  
    case VK_MENU: 8@S5P$b};  
     MaskBits|=ALTBIT; &SzLEbU!  
     break; 5&uS700  
    case VK_CONTROL: C&\vVNV;9  
     MaskBits|=CTRLBIT; w84 ] s%y  
     break; Cw=wU/)  
    case VK_SHIFT: (f5v{S6b(  
     MaskBits|=SHIFTBIT; e|L$e0  
     break; X@ljZ  
    default: //judge the key and send message I& `>6=)  
     break; 'k9?n)<DW  
   } ~vCfMV[F  
   for(int index=0;index<MAX_KEY;index++){ ]wMp`}$b@L  
    if(hCallWnd[index]==NULL) 4HG@moYn@  
     continue; e<wRA["  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) 0P5!fXs*  
    { 9}4EW4  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); )6S;w7  
     bProcessed=TRUE; "dKYJ&$  
    } $J~~.PUXQ  
   } ~/@5&ajz  
  } "! yKX(aTX  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地  9"@P.8_  
   for(int index=0;index<MAX_KEY;index++){ O\5*p=v  
    if(hCallWnd[index]==NULL) ]g>@r.Nc  
     continue; %HRFH  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) >PsP y.  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); 3wS{@'  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 !  Z e  
   } S;o U'KOY  
  } )$#r6fQO  
 } iwHy!Vi-5  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); _HT*>-B  
} /12D >OK  
I6]|dA3G  
  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: [\hk_(}  
*>=vSRL0_  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); /S]W< 8d  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); mErXdb|L  
"EoC7 1  
  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: 62BJ;/ ]  
:'OCQ.[{s  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) gyW*-:C  
{ =5P_xQx  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) h_ ^,|@C "  
 { +[ _)i9a  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 8F$b/Z  
  SaveBmp(); !;SpQ28  
  return FALSE; WC!bB  
 } ~3 {C &c  
 …… //其它处理及默认处理 \ B~9Ue!  
} zS Yh ?NB5  
&FWPb#  
_v=@MOI/J  
  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。 qAH@)}  
HQ%-e5Q  
  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。 Z\=].[,w4  
;Yrg4/Ipa  
  二、编程步骤 Mk=;UBb$X  
L3Leb%,!  
  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"; H=vrF-#  
DPfP)J:~  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; nL}bCX{  
mT.p-C  
  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; IJ^KYho  
}2Lh'0 xY  
  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; >4:W:;R  
_tR%7%3*  
  5、 添加代码,编译运行程序。 U.oxLbJ`  
5Wj+ey^ ^w  
三、程序代码 ]MkZ1~f7  
*G^n<p$"  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL #@,39!;,:O  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) 8Ek<J+& |I  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ #e.2m5T  
#if _MSC_VER > 1000 6 ^X$;  
#pragma once ;Ef:mr"Nu  
#endif // _MSC_VER > 1000 c7j^O P  
#ifndef __AFXWIN_H__ BoB2q(  
#error include 'stdafx.h' before including this file for PCH D[)")xiG  
#endif 4z-sR/d  
#include "resource.h" // main symbols 3G9YpA_}X  
class CHookApp : public CWinApp b#-5b%ON  
{ dbkccO}WB  
 public: %3e}YQe)  
  CHookApp(); e~r%8.Wm  
  // Overrides 5_+vjV;5  
  // ClassWizard generated virtual function overrides -OpI,qyS  
  //{{AFX_VIRTUAL(CHookApp) G7k0P-r,0  
 public: $Yt29AQ  
  virtual BOOL InitInstance(); ,\;;1Kq  
  virtual int ExitInstance(); 'Y+AU#1~H  
  //}}AFX_VIRTUAL ,ZcW+!  
  //{{AFX_MSG(CHookApp) zCD?5*7  
  // NOTE - the ClassWizard will add and remove member functions here. 07"dU  
  // DO NOT EDIT what you see in these blocks of generated code ! v{ .-x\;  
  //}}AFX_MSG 9&}`.Py  
  DECLARE_MESSAGE_MAP() 5y! 4ny _  
}; d"+zDc;  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); g$~3@zD  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); WYTeu "  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); XG"&\FL{T  
BOOL InitHotkey(); %}cGAHV  
BOOL UnInit(); &0Zn21q  
#endif Ebp^-I9.d  
8NJ(l  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. )2}{fFa%  
#include "stdafx.h" 2 [a#wz'  
#include "hook.h" TH2D;uv  
#include <windowsx.h> OpY2Z7_  
#ifdef _DEBUG %R5APMg1  
#define new DEBUG_NEW QP|Ou*Qm)  
#undef THIS_FILE =+q9R`!L]  
static char THIS_FILE[] = __FILE__; BVxg=7%St  
#endif SsDz>PP  
#define MAX_KEY 100 RqW ZhHI1M  
#define CTRLBIT 0x04 Q7$ILW-S  
#define ALTBIT 0x02 DO(-)i zC  
#define SHIFTBIT 0x01 Vg/{;uLAe  
#pragma data_seg("shareddata") S\GC^ FK  
HHOOK hHook =NULL; hS&,Gm`^  
UINT nHookCount =0; L)VEA8}  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey )((Jnm D  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT 0U]wEz*b  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey #NVtZs!V/  
static int KeyCount =0; 38! $9)  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift k,M%/AXd  
#pragma data_seg() 693J?Yah[  
HINSTANCE hins; cu|gM[  
void VerifyWindow(); $rDeI-)S  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) @D8c-`LC"*  
//{{AFX_MSG_MAP(CHookApp) :(?joLA  
// NOTE - the ClassWizard will add and remove mapping macros here. S#qd#Zk|Y  
// DO NOT EDIT what you see in these blocks of generated code! cj-P&D[Ny[  
//}}AFX_MSG_MAP eX 9{wb(  
END_MESSAGE_MAP() qIK"@i[ uq  
cD^n}'ej  
CHookApp::CHookApp() I,vy__ sZ  
{ R8UtX9'*sa  
 // TODO: add construction code here, oK@!yYv  
 // Place all significant initialization in InitInstance S =q.Y  
} Lm\N`  
.ps'{rl8  
CHookApp theApp; +ex@[grsGT  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) ; A~S){  
{ oju7<b9Ez  
 BOOL bProcessed=FALSE; ?b2  
 if(HC_ACTION==nCode) F ^Rt 6Io  
 { UiA\J  
  if((lParam&0xc0000000)==0xc0000000){// Key up  ~%_$e/T  
   switch(wParam) 9 )u*IGj  
   { 6 k+FTDL  
    case VK_MENU: CJk$o K{Q  
     MaskBits&=~ALTBIT; O>xGH0H  
     break; .&.j?kb  
    case VK_CONTROL: =6imrRaaV  
     MaskBits&=~CTRLBIT; $x 6Rmd{  
     break; 9_[TYzpB!  
    case VK_SHIFT: }6.R.*Imz  
     MaskBits&=~SHIFTBIT; :kqJ~  
     break; B;[{7J]  
    default: //judge the key and send message ?ltTJ(Po  
     break; bLGgu#  
   } ex7zg!  
   for(int index=0;index<MAX_KEY;index++){ l]inG^s  
    if(hCallWnd[index]==NULL) /ZZo`   
     continue; >|!F.W  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) E#r6e+e1Q%  
    { _)Q) tOW  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); ed4:r/Dpo  
     bProcessed=TRUE; 2}>jq8Y47  
    } rH8^Fl&jT  
   } `GS!$9j  
  } ;oV dkp  
  else if((lParam&0xc000ffff)==1){ //Key down ,rc5r3  
   switch(wParam) y.2_5&e/  
   {  db^S@}  
    case VK_MENU: DCM ,|FE  
     MaskBits|=ALTBIT; @Z~lM5n$8  
     break; vL@N21u  
    case VK_CONTROL: ?1i>b->  
     MaskBits|=CTRLBIT; !Sfy'v.  
     break; ln)_Jf1r  
    case VK_SHIFT: 8s pGDg\g  
     MaskBits|=SHIFTBIT; CL|t!+wU/  
     break; :}TT1@  
    default: //judge the key and send message ej>8$^y  
     break; ]p:x,%nm  
   } \v{tK;  
   for(int index=0;index<MAX_KEY;index++) KOGbC`TN<  
   { ibex:W^  
    if(hCallWnd[index]==NULL) d*Dq=.F(  
     continue; Ev%4}GwO4  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) ;$l!mv 7  
    { L=3^A'|  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); T[B@7$Dp*  
     bProcessed=TRUE; aiGT!2  
    } w|gtb~oh  
   } AJ[g~ s't  
  } ~"!F&  
  if(!bProcessed){ 9+U%k(9  
   for(int index=0;index<MAX_KEY;index++){ 0[TZ$<v"  
    if(hCallWnd[index]==NULL) lZZ4 O(  
     continue; 7$WO@yOsh  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) !=--pb  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); buX$O{43I  
   } gBUtv|(@>[  
  } o!^':mll  
 } *O,\/aQ+  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); G^!20`p:  
} ]R\k@a|G  
=K .'x  
BOOL InitHotkey() 6tB-  
{ 5c($3Pno=  
 if(hHook!=NULL){ q3JoU/Sf  
  nHookCount++; EC$wi|i  
  return TRUE; bVSa}&*kM  
 } x0@J~ _0  
 else (p26TN;*$5  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); %h 6?/  
  if(hHook!=NULL) )Xg,;^  
   nHookCount++; e5maZ(.;F  
  return (hHook!=NULL); n c:^)G  
} sh[Yu  
BOOL UnInit() 7g}4gX's  
{ FYR%>Em  
 if(nHookCount>1){ ~{iBm"4  
  nHookCount--; P}N%**>`  
  return TRUE; }legh:/*?O  
 } 9"1 0:\U  
 BOOL unhooked = UnhookWindowsHookEx(hHook); _ $PZID  
 if(unhooked==TRUE){ dN\Byl(6  
  nHookCount=0; wQWokpP;T7  
  hHook=NULL; 4_3Jpz*  
 } v>YdPQky  
 return unhooked; ^%-$8sV  
} DhV($&*M  
} *|_P  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) BusD}9QqB  
{ Gp'rN}i^  
 BOOL bAdded=FALSE; :,%~rR  
 for(int index=0;index<MAX_KEY;index++){ st P~/}  
  if(hCallWnd[index]==0){ csz/[*  
   hCallWnd[index]=hWnd; HGfV2FtTz  
   HotKey[index]=cKey; 0RAmwfXm  
   HotKeyMask[index]=cMask; 2MQgTFM9  
   bAdded=TRUE; &Z/aM?  
   KeyCount++; !}|n3wQ  
   break; a_4Ny  
  } <KqZ.7XfB  
 } %&5 !vK  
 return bAdded; $UavM|  
} z:-a7_   
_O2},9L n  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) K,bv\j;f  
{ UhYeyT  
 BOOL bRemoved=FALSE; x$d3 fsEE  
 for(int index=0;index<MAX_KEY;index++){ /+pbO-rW*  
  if(hCallWnd[index]==hWnd){ I>o+INb:  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ d a we!w!  
    hCallWnd[index]=NULL; vpcx 1t<  
    HotKey[index]=0; rM#jxAb  
    HotKeyMask[index]=0; K@Q_q/(%;  
    bRemoved=TRUE; 8o#*0d|  
    KeyCount--; Iq0_X7:{QI  
    break; T`7;Rl'Q  
   } /~NsHStn  
  } _*h,,Q  
 } eU 'DQp*  
 return bRemoved; `G&W%CHB  
} l-xKfp`  
b|U&{I>TH  
void VerifyWindow() zJWBovT/  
{ *gfx'$  
 for(int i=0;i<MAX_KEY;i++){ zQM3n =y  
  if(hCallWnd!=NULL){ ce th)Xm  
   if(!IsWindow(hCallWnd)){ BM!\U 6  
    hCallWnd=NULL; a_XM2dc%  
    HotKey=0; Vd~{SS 2>  
    HotKeyMask=0; Hq[d!qc  
    KeyCount--; <h:>:%#k  
   } #-dfG.*  
  } JUXIE y^  
 } pXf@Y}mH  
} uN20sD}  
Q1 ?O~ao  
BOOL CHookApp::InitInstance() U.is:&]E  
{ y}*rRm.:  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); 2.CjjI  
 hins=AfxGetInstanceHandle(); Ex9%i9H  
 InitHotkey(); sE@t$'=  
 return CWinApp::InitInstance(); /=I&-g xC  
} 90L,.  
L9nv05B  
int CHookApp::ExitInstance() aKXaor@0f.  
{ Nq6~6Rr  
 VerifyWindow(); A]" $O&l  
 UnInit(); opxVxjTT#  
 return CWinApp::ExitInstance(); S%gb1's  
} Qg;A (\z  
2*Hw6@Jj  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file Dw{rjK\TT'  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) xO)vn\uJ  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ c;c'E&9P]  
#if _MSC_VER > 1000 R+k-mbvnt  
#pragma once vKN"o* q  
#endif // _MSC_VER > 1000 3-#|6khqt  
O9*cV3}H  
class CCaptureDlg : public CDialog ss63/   
{ O 4@sN=o  
 // Construction hNs970i  
 public: Ug02G  
  BOOL bTray; e\x=4i  
  BOOL bRegistered; <6^MVaD  
  BOOL RegisterHotkey(); {WUW.(^]G  
  UCHAR cKey; y>wrm:b-O  
  UCHAR cMask; =<w6yeko  
  void DeleteIcon(); d!kiWmw,  
  void AddIcon(); 6, \i0y5n  
  UINT nCount; S6CM/  
  void SaveBmp(); #TZf\0\!  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor 9XWHr/-_@  
  // Dialog Data )w];eF0c  
  //{{AFX_DATA(CCaptureDlg) ''Fy]CwH(  
  enum { IDD = IDD_CAPTURE_DIALOG }; UH/)4Wg  
  CComboBox m_Key; #R$d6N[H  
  BOOL m_bControl; |d^r"wbs3  
  BOOL m_bAlt; TJFxo? gC"  
  BOOL m_bShift; _h>S7-X  
  CString m_Path; Rr ! PU  
  CString m_Number; ofbNg_K>  
  //}}AFX_DATA @/h_v#W  
  // ClassWizard generated virtual function overrides S6-)N(3|  
  //{{AFX_VIRTUAL(CCaptureDlg) @k:f(c  
 public: 9z7^0Ruw  
  virtual BOOL PreTranslateMessage(MSG* pMsg); %^s;{aN*!  
 protected: 2`>/y  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support TY~8`+bJ  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); N1$lG? )+  
  //}}AFX_VIRTUAL 'U ',9  
  // Implementation U ^1Xc#Ff  
 protected: ~01 o  
  HICON m_hIcon; T P'  
  // Generated message map functions 9n{tbabJ  
  //{{AFX_MSG(CCaptureDlg) OJ8ac6cJ  
  virtual BOOL OnInitDialog(); e^kccz2f  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); eq.K77El{J  
  afx_msg void OnPaint(); 9,|{N(N<!  
  afx_msg HCURSOR OnQueryDragIcon(); ~$XbYR-  
  virtual void OnCancel(); >m='#x0>Y  
  afx_msg void OnAbout(); owL>w  
  afx_msg void OnBrowse(); WccTR aq  
  afx_msg void OnChange(); :e>y= s>  
 //}}AFX_MSG )\!_`ob  
 DECLARE_MESSAGE_MAP() '9^+J7iO(+  
}; 9EzXf+f  
#endif vmdu9"H  
h(]aP<49L  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file Dyv 6K_,  
#include "stdafx.h" USfpCRj9  
#include "Capture.h" ceBu i8a |  
#include "CaptureDlg.h" /Am,5X.   
#include <windowsx.h> `|K30hRp:  
#pragma comment(lib,"hook.lib") JU+Uzp   
#ifdef _DEBUG vQB;a?)o  
#define new DEBUG_NEW 2RXU75VY  
#undef THIS_FILE =H&{*Ja  
static char THIS_FILE[] = __FILE__; E!<w t  
#endif qN((Xz+AZE  
#define IDM_SHELL WM_USER+1 .),ql_sXr  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); 19-|.9m(  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); T0BFit6  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; [kwVxaI  
class CAboutDlg : public CDialog ,!+>/RlJ  
{ -w nlJi1f  
 public: <#AS[Q[N  
  CAboutDlg(); Q\>9PKK  
  // Dialog Data 2w)[1s[  
  //{{AFX_DATA(CAboutDlg) p12'^i |  
  enum { IDD = IDD_ABOUTBOX }; ?U'c;*O-  
  //}}AFX_DATA pN# \  
  // ClassWizard generated virtual function overrides zf-)c1$*r  
  //{{AFX_VIRTUAL(CAboutDlg) l>K z5re^  
 protected: fw aq  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support !f5I.r~  
  //}}AFX_VIRTUAL d`]| i:*q  
  // Implementation j3{8]D  
 protected: cU <T;1VQ  
  //{{AFX_MSG(CAboutDlg) 0'u2xe  
  //}}AFX_MSG ?K, xxH  
  DECLARE_MESSAGE_MAP() pvCn+y/U;  
}; "@: b'm  
r.1/ * i  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) $s$j</.q  
{ h+EG) <  
 //{{AFX_DATA_INIT(CAboutDlg) dqwCyYC  
 //}}AFX_DATA_INIT 4oW6&1  
} Y1 RiuJtL  
?EP>yCR9  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) BR\3ij  
{ qr>:meJy4  
 CDialog::DoDataExchange(pDX); R'R LF =  
 //{{AFX_DATA_MAP(CAboutDlg) Hq9yu*!u  
 //}}AFX_DATA_MAP ;xF5P'T?|  
} ~=HrD?-99p  
1.\|,$  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) 3S4'x4*  
 //{{AFX_MSG_MAP(CAboutDlg) 5J!ncLNm{  
 // No message handlers 3[8F:I0UL  
 //}}AFX_MSG_MAP I*c B Ha  
END_MESSAGE_MAP() WrvSYqN  
MZp`  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) >C,=elM  
: CDialog(CCaptureDlg::IDD, pParent) QC@nRy8%  
{ hAx#5@*5  
 //{{AFX_DATA_INIT(CCaptureDlg) 3^p<Wx  
  m_bControl = FALSE; (!kd9uV  
  m_bAlt = FALSE; /G)Y~1ASA%  
  m_bShift = FALSE; %qG nvQ  
  m_Path = _T("c:\\"); i,HafY  
  m_Number = _T("0 picture captured."); 5!WQ  
  nCount=0; Y r3h=XY  
  bRegistered=FALSE; v:otR%yt  
  bTray=FALSE; PDN3=PAR/A  
 //}}AFX_DATA_INIT .48Csc-  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 E ]eVoC  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); 3I0=^ >A  
} ,G2]3 3Z  
^R\et.W`s  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) !OwRx5  
{ :4 9ttJl  
 CDialog::DoDataExchange(pDX); R.n:W;^`  
 //{{AFX_DATA_MAP(CCaptureDlg) EC[2rROn\  
  DDX_Control(pDX, IDC_KEY, m_Key); 2c?-_OCy;  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); s7j#Yg  
  DDX_Check(pDX, IDC_ALT, m_bAlt); aju!Aq54G  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); Y:|_M3&'o  
  DDX_Text(pDX, IDC_PATH, m_Path); piq1cV  
  DDX_Text(pDX, IDC_NUMBER, m_Number); a/ d'(]  
 //}}AFX_DATA_MAP kMD:~ V  
} Q'?{_  
[UO?L2$&  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) aH@Ux?-}  
//{{AFX_MSG_MAP(CCaptureDlg) o$dnp`E  
 ON_WM_SYSCOMMAND() K/oC+Z;K  
 ON_WM_PAINT() |#<PI9)`  
 ON_WM_QUERYDRAGICON() Y=RdxCCx4  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) Oc\Bu6F  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) .&Uu w  
 ON_BN_CLICKED(ID_CHANGE, OnChange) 32DT]{-N!  
//}}AFX_MSG_MAP K_\fO|<k  
END_MESSAGE_MAP() 7A7=~:l\G  
5Ym/'eT  
BOOL CCaptureDlg::OnInitDialog() [S{KGe:g  
{ $dr=M (&  
 CDialog::OnInitDialog();  ByP  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);  Fa  
 ASSERT(IDM_ABOUTBOX < 0xF000); X\X* -.]{  
 CMenu* pSysMenu = GetSystemMenu(FALSE); GLI 5AbQK  
 if (pSysMenu != NULL) 7;cb^fi/  
 { 3yNILj  
  CString strAboutMenu; #$!(8>YJ  
  strAboutMenu.LoadString(IDS_ABOUTBOX); kpc3l[.A  
  if (!strAboutMenu.IsEmpty()) =`VA_xVu  
  { ?6h65GO{  
   pSysMenu->AppendMenu(MF_SEPARATOR); W zM9{c  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); C$MaJHkiF  
  } .xXe *dm%  
 } F$TNYZ  
 SetIcon(m_hIcon, TRUE); // Set big icon ` VL`8  
 SetIcon(m_hIcon, FALSE); // Set small icon +eiM6* /0  
 m_Key.SetCurSel(0); ^[]G sF  
 RegisterHotkey(); EL_rh TWw  
 CMenu* pMenu=GetSystemMenu(FALSE); i <KWFF#  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); XXuIWIhm  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); sT| $@$bN  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); {XC1B  
 return TRUE; // return TRUE unless you set the focus to a control VCOz?Y*  
} y*ae 5=6(  
LKtug>Me  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) ~jK'n4  
{ u,<#z0R|;$  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) $umh&z/  
 { WfbG }%&J  
  CAboutDlg dlgAbout; Y02 cX@K6  
  dlgAbout.DoModal(); SKTf=rY  
 } 5<o8prt B  
 else j$l[OZ:#  
 { U68o"iE  
  CDialog::OnSysCommand(nID, lParam); lR5< G  
 } Wn*>h'R  
} +5n,/YjS`  
xO8-vmf2  
void CCaptureDlg::OnPaint() :1Jg;G  
{ #{973~uj  
 if (IsIconic()) Xg>nb1e  
 { R"Q=U}?$  
  CPaintDC dc(this); // device context for painting \x JGR!  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); y,$kU1yH7  
  // Center icon in client rectangle fmH"&>Loc  
  int cxIcon = GetSystemMetrics(SM_CXICON); CXqU< a&  
  int cyIcon = GetSystemMetrics(SM_CYICON); )6?(K"T  
  CRect rect; y%.^| G  
  GetClientRect(&rect); an+`>}]F  
  int x = (rect.Width() - cxIcon + 1) / 2; lq2P10j@  
  int y = (rect.Height() - cyIcon + 1) / 2; b!W!Vvf^x  
  // Draw the icon HCP' V  
  dc.DrawIcon(x, y, m_hIcon); ~Yrtz   
 } `<I+(8]Uz  
 else * b+ef  
 { Kk?P89=*  
  CDialog::OnPaint(); ia.95H;  
 } 63b?-.!b  
} r)$(>/[$  
U 00}jH  
HCURSOR CCaptureDlg::OnQueryDragIcon() QdaYP  
{ n W2[x;  
 return (HCURSOR) m_hIcon; u<`CkYT  
} ?C#=Q6  
Q v/}WnBk  
void CCaptureDlg::OnCancel() 8 VMe#41  
{ d! 0p^!3  
 if(bTray) Xy{\>}i]N  
  DeleteIcon(); #h'F6  
  CDialog::OnCancel(); #7S[Ch}O  
} ZJev_mj  
P;R`22\3  
void CCaptureDlg::OnAbout() _8$arjx=  
{ }eA2y($N  
 CAboutDlg dlg; qaK9E@l  
 dlg.DoModal(); P]*,955*)  
} %{$iN|%J%$  
P$E#C:=  
void CCaptureDlg::OnBrowse() `Q d_Gu,M  
{ a4gJ-FE  
 CString str; _~m@ SI  
 BROWSEINFO bi; #K1VPezN  
 char name[MAX_PATH]; v]CH L# |  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); X) lzBM  
 bi.hwndOwner=GetSafeHwnd(); :BLD &mb"Y  
 bi.pszDisplayName=name; T_}9b  
 bi.lpszTitle="Select folder"; t!MGSB~  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; %u"3&kOV  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); 3D3/\E#'o  
 if(idl==NULL) ` <+MR6M  
  return; uW*)B_c  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); /Jz?~H{%n  
 str.ReleaseBuffer(); ~(4;P%L:  
 m_Path=str; h^E"eC  
 if(str.GetAt(str.GetLength()-1)!='\\') ZTV|rzE   
  m_Path+="\\"; ,k}-I65M*t  
 UpdateData(FALSE); {[V<mT2/  
} /]~Oa#SQ:  
p<#WueR[  
void CCaptureDlg::SaveBmp() 5 rpX"(  
{ feOX]g#  
 CDC dc; \XaKq8uE  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); qKX3Npw  
 CBitmap bm; m[~fT(NI  
 int Width=GetSystemMetrics(SM_CXSCREEN); =aM(r6 C  
 int Height=GetSystemMetrics(SM_CYSCREEN); ~>:uMXyV2t  
 bm.CreateCompatibleBitmap(&dc,Width,Height); (=n{LMa  
 CDC tdc; C*A!`Q?1Y  
 tdc.CreateCompatibleDC(&dc); Y%AVC9(  
 CBitmap*pOld=tdc.SelectObject(&bm); &S/@i|_  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); ?kfLOJQ:I  
 tdc.SelectObject(pOld); H$2<N@'4z  
 BITMAP btm; - inZX`afA  
 bm.GetBitmap(&btm); Wr.G9zq.+  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; APydZ  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); +C4UM9  
 BITMAPINFOHEADER bih; 2H7b2%  
 bih.biBitCount=btm.bmBitsPixel; *c<=IcA  
 bih.biClrImportant=0; .!yXto:  
 bih.biClrUsed=0; $)w9EGZ  
 bih.biCompression=0; `9IG//  
 bih.biHeight=btm.bmHeight; N?]HWP^pg  
 bih.biPlanes=1;  4[=vt  
 bih.biSize=sizeof(BITMAPINFOHEADER); e nsou!l  
 bih.biSizeImage=size; |X:"AH"S  
 bih.biWidth=btm.bmWidth; X wvH  
 bih.biXPelsPerMeter=0; eEvE3=,hg  
 bih.biYPelsPerMeter=0; y \M]\^[7  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); #bN'N@|  
 static int filecount=0; '!8'Xo@Go3  
 CString name; L1'R6W~%dN  
 name.Format("pict%04d.bmp",filecount++); i,5mH$a&u:  
 name=m_Path+name; hS<lUG!9UJ  
 BITMAPFILEHEADER bfh; Gw 4~  
 bfh.bfReserved1=bfh.bfReserved2=0; C"`,?K(U  
 bfh.bfType=((WORD)('M'<< 8)|'B'); 9?8Yf(MC%u  
 bfh.bfSize=54+size; n o6q3<re  
 bfh.bfOffBits=54; zo!e<>o  
 CFile bf; 0q6$KP}q  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ a o"\L0;{  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); UVND1XV^f  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); Yyl(<,Yi  
  bf.WriteHuge(lpData,size); x+niY;Z E  
  bf.Close(); y7a84)j3  
  nCount++; HV_5 +  
 } QahM)Gb  
 GlobalFreePtr(lpData); ''Lf6S`4X~  
 if(nCount==1) \]bAXa{ p  
  m_Number.Format("%d picture captured.",nCount); /_yJ;l/K  
 else 6Z2a5zO8  
  m_Number.Format("%d pictures captured.",nCount); 5Q $6~\  
  UpdateData(FALSE); PtR8m=O  
} !% 'dyj  
'Z^-(xG,+  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) -_<rmR[:]  
{ wGRMv1|lIu  
 if(pMsg -> message == WM_KEYDOWN) 9 b?Nlk8d  
 { rUJIf;Zwo  
  if(pMsg -> wParam == VK_ESCAPE) (MfPu8j  
   return TRUE; Qq,w6ekr  
  if(pMsg -> wParam == VK_RETURN) kkvG=  
   return TRUE; [FhFeW>  
 } b/>L}/^PM  
 return CDialog::PreTranslateMessage(pMsg); J['pBlEb\  
} F#<$yUf%  
14U:.Q  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) P*9vs%W  
{ Jat|n97$  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ 'Ipp1a Z_M  
  SaveBmp(); )#|I(Gz ^  
  return FALSE; NR </Jm*  
} QzV Q}  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ gK8E|f-z  
 CMenu pop; S5a?KU  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); |}hV_   
 CMenu*pMenu=pop.GetSubMenu(0); =\[}@Kh  
 pMenu->SetDefaultItem(ID_EXITICON); -SF *DZ  
 CPoint pt; ~57.0?IK  
 GetCursorPos(&pt); ak_&\'P  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); S.^/Cl;aj  
 if(id==ID_EXITICON) El9D1],  
  DeleteIcon();  ' ];|  
 else if(id==ID_EXIT) 5Vq&w`sW  
  OnCancel(); vz{Z tE"  
 return FALSE; m :M=De  
} -OvzEmI"  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); w-2?|XvDmf  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) 3rRN~$  
 AddIcon(); +;@p'af!9  
 return res; 1$A7BP  
} 5;:P^[cH9  
eyUhM jd  
void CCaptureDlg::AddIcon() P&3Z,f0  
{ ^seb8o7  
 NOTIFYICONDATA data; OhNEt>  
 data.cbSize=sizeof(NOTIFYICONDATA); i.~*G8!DM  
 CString tip; c5vi Y|C^  
 tip.LoadString(IDS_ICONTIP); 2|n)ZP2cp  
 data.hIcon=GetIcon(0); p`oSI}ZwB  
 data.hWnd=GetSafeHwnd(); r]6X  
 strcpy(data.szTip,tip); ;";#{B:  
 data.uCallbackMessage=IDM_SHELL; ^nPk;%`0  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; dq.'[  
 data.uID=98; #KFpT__F  
 Shell_NotifyIcon(NIM_ADD,&data); 5:" zs  
 ShowWindow(SW_HIDE); klUW_d-  
 bTray=TRUE; _T8o]  
} /8$*{ay  
pb`!_GmB  
void CCaptureDlg::DeleteIcon() mrc% 6Ri  
{ cq?&edjP  
 NOTIFYICONDATA data; p  K=  
 data.cbSize=sizeof(NOTIFYICONDATA); zJxO\  
 data.hWnd=GetSafeHwnd(); T?!D?YV  
 data.uID=98; |mHxkd  
 Shell_NotifyIcon(NIM_DELETE,&data); X3# AYn,  
 ShowWindow(SW_SHOW); ZvSWIQ6  
 SetForegroundWindow(); Y\Grf$e  
 ShowWindow(SW_SHOWNORMAL); -n>JlfCd2  
 bTray=FALSE; B'@a36  
} {Xj2c]A1  
iUH{rh!  
void CCaptureDlg::OnChange() &I=27!S  
{ v&#=1Zb  
 RegisterHotkey(); 1G6 %?Iph  
} <aScA`\B#  
M@ TXzn!&o  
BOOL CCaptureDlg::RegisterHotkey() et-<ib<lY  
{ r=S6yq}  
 UpdateData(); _--kK+rU  
 UCHAR mask=0; Gdi8Al]\Nl  
 UCHAR key=0; ko Tb{UL  
 if(m_bControl)  ~[wh  
  mask|=4; JGZxNUr^  
 if(m_bAlt) +DpiX&^h   
  mask|=2;  o(q][:,h  
 if(m_bShift) li`4&<WGC  
  mask|=1; 3Mlwq'pzD  
  key=Key_Table[m_Key.GetCurSel()]; vwc)d{ND  
 if(bRegistered){ 7y/Pch  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); )|Il@unp/  
  bRegistered=FALSE; 8Ev,9  
 } [Y%H8}  
 cMask=mask; &OXnZT3P  
 cKey=key; )9PP3"I  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); eG F{.]  
 return bRegistered; 0}:wM':G  
} |K7zN\ Wq  
}BR@vY'd  
  四、小结 sy s6 V?  
"c'K8,+?  
  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