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
  • 6835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: oKIry 8'^N  
  uzO%+B!  
  一、实现方法 apxZ}  
4:\s.Z{!3  
  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: m6a q_u{W  
g)*[W>M  
#pragma data_seg("shareddata") x1m J&D  
HHOOK hHook =NULL; //钩子句柄 Y[AL!h  
UINT nHookCount =0; //挂接的程序数目 m6BIQ(l  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 ~q]+\qty4  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 DiK@>$v  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey h1.]Nl C  
static int KeyCount =0; D?w?0b Eu  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 1}e1:m]r  
#pragma data_seg() c9\jELO  
]8(_{@ /  
  关于共享段,有几点重要的说明:一是必须在链接选项里指定该段为共享:一种方法是在project->settings->link->object/library中加上/section:shareddata,rws;第二种方法是在def文件的sections里加上一句shareddata read write shared;第三种指定共享段的方法在程序里加上一句#pragma comment(linker,"section:shareddata,rws")。二是所有的变量必须初始化,否则链接程序会把它放到普通数据段。三是如果不初始化变量,需要在段外用"__declspec(allocate("shareddata")) 变量类型 变量名"的方式定义。 QE&rpF7l{  
iH& Izv  
  DLL中的两个输出函数分别用来添加/删除热键,函数代码如下: FbB> Md;  
=`5Xx(  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR ,?GEL>F  
cKey,UCHAR cMask) LL5n{#)N  
{ nB?$W4  
 BOOL bAdded=FALSE; ^Bw2y&nN  
 for(int index=0;index<MAX_KEY;index++){ VnUW UIVJ  
  if(hCallWnd[index]==0){ eK\1cs  
   hCallWnd[index]=hWnd; Vx@JP93|  
   HotKey[index]=cKey; 0c4H2RW  
   HotKeyMask[index]=cMask; ffK A  
   bAdded=TRUE; !/G2vF"  
   KeyCount++; MXY[t  
   break; YC#N],#  
  } nwh7DU i  
 }  Hu|;cbK  
 return bAdded; YaJ[39V  
} q3\ YL?  
//删除热键 m72r6Yq2@  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) !|{T>yy  
{ l5ww-#6Z  
 BOOL bRemoved=FALSE; bX%9'O[-  
 for(int index=0;index<MAX_KEY;index++){ 'Z#8]YP`  
  if(hCallWnd[index]==hWnd){ VfOm#Ue0 q  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ '#REbY5ev  
    hCallWnd[index]=NULL; {)]5o| Hx  
    HotKey[index]=0; o 5dPE{f  
    HotKeyMask[index]=0; H%`Ja('"p  
    bRemoved=TRUE; FU9q|!2Y  
    KeyCount--; 7Z0fMk  
    break; iE$qq ~%  
   } K^j7T[pR  
  } e;9Z/);#s  
 } t<5 $85Y~  
 return bRemoved; =n>&Bl-Bl  
} 25%[nkO4  
'{+5+ J  
?|LR@M!S7  
  DLL中的钩子函数如下: ) -x0xY  
c8!q_H~  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) f QSP]?  
{ ]cvP !  
 BOOL bProcessed=FALSE; WPT0=Hqp7  
 if(HC_ACTION==nCode) F]kn4zr  
 { \^O&){q(9  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 F}p)Q$0  
   switch(wParam) y/57 >.3  
   {  NuZiLtC  
    case VK_MENU: 4X tIMa28  
     MaskBits&=~ALTBIT; z\wY3pIr2  
     break; Q-<N)K$F(4  
    case VK_CONTROL: r:fMd3;gq  
     MaskBits&=~CTRLBIT; G^E"#F  
     break; wWjZXsOd  
    case VK_SHIFT: tnL$v2e6q  
     MaskBits&=~SHIFTBIT; .|Unq`ll  
     break; XS+2OutVo  
    default: //judge the key and send message j4pxu/2  
     break; 4e OS+&  
   } @@->A9'L  
   for(int index=0;index<MAX_KEY;index++){ X@;; h  
    if(hCallWnd[index]==NULL) e$'|EE.=q+  
     continue; Sep/N"7~t  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) a`/\0~  
    { Egy#_ RT{  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); )LOV)z|}  
     bProcessed=TRUE; 44@yQ?  
    } ux>wa+XFa  
   } 7dxTyn=  
  } L>xecep  
  else if((lParam&0xc000ffff)==1){ //有键按下 d2'1 6.lV  
   switch(wParam) Q8d-yJs&  
   { \PU7,*2  
    case VK_MENU: pE&'Xr#P>  
     MaskBits|=ALTBIT; +UvT;"  
     break; mf4C68DI@u  
    case VK_CONTROL: ?rauhTVnJ  
     MaskBits|=CTRLBIT; _m0B6?KJ  
     break; b { M'aV  
    case VK_SHIFT: t[=-4;  
     MaskBits|=SHIFTBIT; Mg pjC`  
     break; zDK"Y{  
    default: //judge the key and send message |FED<  
     break; qnO>F^itF  
   } W=-:<3XL  
   for(int index=0;index<MAX_KEY;index++){ cmcR @zv  
    if(hCallWnd[index]==NULL) a+!r5689  
     continue; A!GQ4.~%  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) ~7;AV(\%e  
    { .#Vup{.  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); j'IZetT  
     bProcessed=TRUE; DH IC:6EY  
    } Bjc<d,]  
   } [\BLb8  
  } wk9qyv<  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 ?"@`SEdnU2  
   for(int index=0;index<MAX_KEY;index++){ U*Sjb% Qb  
    if(hCallWnd[index]==NULL) *!5X!\e_  
     continue; "h\ (a<  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) ][?@) )  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); l $:?82{  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 DnP "7}v  
   } P9yg  
  } A6S|pO1)3  
 } @h E7F}  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); *S= c0  
} JIOeDuw+  
&P:2`\'  
  抓图程序是一个基于对话框的程序,它在建立对话框的时候调用前面的DLL,登记热键,因此需要将hook.lib添加到工程里,在程序里给出两个DLL函数的定义,也可以写个头文件,再包含进来以下代码: #E;a ;$p  
{lO>i&mx  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); lHI?GiB@  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); 1e)5D& njS  
7=`_UqCV  
  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: q]\GBRp  
qBDhCE  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) "lnI@t{o  
{ :pw6#yi8`  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) H[J5A2b  
 { kE[Hq-J=N  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 M{)|9F  
  SaveBmp(); w|[{xn^R  
  return FALSE; FCIA8^}s  
 } :=oIvSnh  
 …… //其它处理及默认处理 e13' dCG  
} ZOzwO6(_  
j`l'Mg  
n eBcS[  
  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。 #-7m@EU;O  
#!7b3>}  
  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。 G_v^IM#B=  
DTN)#G CtF  
  二、编程步骤 fl+dL#]  
<7*d2  
  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"; r}M2t$nv  
r 3FUddF'  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; Y*-dUJK-`  
PL*1-t?#  
  3、 在"Capture"项目中按照图一所示设置对话框的界面,具体设置参见代码部分; FB }8  
3FsX3K,_X  
  4、 使用Class Wizard在"Capture"项目中添加按钮的鼠标单击消息响应函数,并重载对话框的WindowProc()函数; Q=?YY-*$  
n_eN|m?@  
  5、 添加代码,编译运行程序。 a+ s%9l  
Ocf:73t  
三、程序代码 Jl-:@[;  
L8~zQV$h  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL 4;)aGN{e  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) rOTxD/  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ @XN*H- |  
#if _MSC_VER > 1000 i/j eb*d0  
#pragma once q 1~3T;Il  
#endif // _MSC_VER > 1000 !~-@p?kW/  
#ifndef __AFXWIN_H__ KA{ JSi  
#error include 'stdafx.h' before including this file for PCH ^+u/Lw&  
#endif _Eus7  
#include "resource.h" // main symbols ^-g-]?q  
class CHookApp : public CWinApp 5K {{o''  
{ d 6zfP1lQ  
 public:  `s~[q  
  CHookApp(); C7_nA:Rc  
  // Overrides _.+2sm   
  // ClassWizard generated virtual function overrides N'=b8J-fF  
  //{{AFX_VIRTUAL(CHookApp) "#=WD  
 public: sG:tyvln  
  virtual BOOL InitInstance(); +OfHa\Nz  
  virtual int ExitInstance(); arb'.:[z^  
  //}}AFX_VIRTUAL 6GsB*hW  
  //{{AFX_MSG(CHookApp) ;, ^AR{+x  
  // NOTE - the ClassWizard will add and remove member functions here. Ct9dV7SH  
  // DO NOT EDIT what you see in these blocks of generated code ! f!13Ob<8r  
  //}}AFX_MSG qV:TuR-|w  
  DECLARE_MESSAGE_MAP() :0vKt 6>Sp  
}; )5Ofr-Y  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); =m/BH^|&W  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); ;C~:C^Q\H  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); qqr]S^WW  
BOOL InitHotkey(); Tw@:sWC  
BOOL UnInit(); 3\H0Nkubts  
#endif oWV^o8& GH  
Cd'K~Ch3  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. F~zrg+VDjL  
#include "stdafx.h" a"whg~  
#include "hook.h" 3$h yV{  
#include <windowsx.h> !"s~dL,7  
#ifdef _DEBUG FSA"U9 w<  
#define new DEBUG_NEW /YD2F  
#undef THIS_FILE Z lR2  
static char THIS_FILE[] = __FILE__; baz~luM  
#endif O"m(C[+ [  
#define MAX_KEY 100 uM@ve(8\  
#define CTRLBIT 0x04 ^8{:RiN6e~  
#define ALTBIT 0x02 >f-*D25f%  
#define SHIFTBIT 0x01 &0JCZ /e  
#pragma data_seg("shareddata") 2F|06E'  
HHOOK hHook =NULL; 2sYOO>  
UINT nHookCount =0; ,&0iFUwN_  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey $uCY\ xqZ  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT $-"V 2  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey =6< Am  
static int KeyCount =0; 7(]M`bBH  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift /=~o|-n8@  
#pragma data_seg() qL/XGIxL?  
HINSTANCE hins; *S] K@g  
void VerifyWindow(); < SvjvV  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) 8mv}-;  
//{{AFX_MSG_MAP(CHookApp) mH5[(?   
// NOTE - the ClassWizard will add and remove mapping macros here. fSw6nEXn  
// DO NOT EDIT what you see in these blocks of generated code! wfrSI:+>  
//}}AFX_MSG_MAP wSIfqf+y  
END_MESSAGE_MAP() RinaGeim  
ZmzYJ$:6  
CHookApp::CHookApp() 2pV@CT  
{ }e4#Mx  
 // TODO: add construction code here, 0qhSV B5  
 // Place all significant initialization in InitInstance uJu#Vr:m  
} ;ep@ )Y  
CZ}%\2>-v  
CHookApp theApp; 'D17]Lp~.  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) m1,yf*U  
{ }4wIfI83K,  
 BOOL bProcessed=FALSE; *|^}=ioj*  
 if(HC_ACTION==nCode) 1^^9'/  
 { 6[SE*/E@L  
  if((lParam&0xc0000000)==0xc0000000){// Key up dBM> ;S;v  
   switch(wParam) :?J0e4.]  
   { 8D1+["&  
    case VK_MENU: L__J(6,V2  
     MaskBits&=~ALTBIT; U[WR?J4~LX  
     break; Ub| -Q  
    case VK_CONTROL: #F25,:hY  
     MaskBits&=~CTRLBIT; Mi2l BEu,  
     break; " UxKG+   
    case VK_SHIFT: VMgO1-F  
     MaskBits&=~SHIFTBIT; O.^1r  
     break; c/ s$*"  
    default: //judge the key and send message ,G%?}TfC)  
     break; e!.r- v9  
   } Df_*W"(v  
   for(int index=0;index<MAX_KEY;index++){ $ITh)#Nj  
    if(hCallWnd[index]==NULL) mmx; Vt$i  
     continue; ;+Uc} =  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) CZ.XEMN\  
    { GjGt' m*  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); SRBQ"X[M2  
     bProcessed=TRUE; n1 kh8,  
    } #5/.n.X"  
   } JtGBNz!"  
  } [lbe_G;  
  else if((lParam&0xc000ffff)==1){ //Key down 'D<84|w:1  
   switch(wParam) ``9`Xq  
   { O0cKmh6=  
    case VK_MENU: 3Z-N*bhC  
     MaskBits|=ALTBIT; ITf, )?|]Y  
     break; }"o,j>IP  
    case VK_CONTROL: <|R`N)AV;  
     MaskBits|=CTRLBIT; fjwUh>[ }  
     break; l d@B  
    case VK_SHIFT: $TR#-q  
     MaskBits|=SHIFTBIT; ^,WXvOy  
     break; Z9vJF.clO  
    default: //judge the key and send message 1Z| {3W  
     break; /O/pAu>  
   } `-QY<STTP9  
   for(int index=0;index<MAX_KEY;index++) dxAP7v  
   { A:5B6Z  
    if(hCallWnd[index]==NULL) "2a&G3}t"  
     continue; B9(e"cMm  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) Sm(t"#dp  
    { ZclZD{%8J  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); H% "R _[+  
     bProcessed=TRUE; Z{gJm9  
    } :L'U>)k  
   } D^jyG6Ch  
  } ~w9.}   
  if(!bProcessed){ g9K7_T #W  
   for(int index=0;index<MAX_KEY;index++){ U~1jmxE  
    if(hCallWnd[index]==NULL) z=/xv},  
     continue; G" &yE.E5  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) _(.,<R5  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); P6 & _q  
   } etk@ j3#  
  }  J0Ik@  
 } ="=Aac#n`  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); NL76 jF  
} ^:F |2  
@ %}4R`S0  
BOOL InitHotkey() C\WU<!  
{ 4_'($FC1  
 if(hHook!=NULL){ VM[U&g<8n  
  nHookCount++; c5f8pa *  
  return TRUE; a$K.Or}  
 } u(92y]3,  
 else X;D"}X4(E  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); WP b4L9<  
  if(hHook!=NULL) %:~LU]KX  
   nHookCount++; +o94w^'^$b  
  return (hHook!=NULL); vsU1Lzna6@  
} }&I^1BHZs  
BOOL UnInit() )1!jv!  
{ eJv_`#R&Of  
 if(nHookCount>1){ NrrnG]#p1  
  nHookCount--; ^A"TY  
  return TRUE; 7Ne`F(c  
 } q=H dGv  
 BOOL unhooked = UnhookWindowsHookEx(hHook); +dIO+(&g  
 if(unhooked==TRUE){ %1Pn;bUU!  
  nHookCount=0; ]*M-8_D  
  hHook=NULL; D:yj#&I  
 } r6#It$NU  
 return unhooked; }hPFd  
} ~VqDh*0  
QlmZ4fT[r  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) >hcze<^S  
{ tAM t7p-  
 BOOL bAdded=FALSE; .*bu:FuDE  
 for(int index=0;index<MAX_KEY;index++){ +UGWTO\#ha  
  if(hCallWnd[index]==0){ 37S  bF,G  
   hCallWnd[index]=hWnd; 1oSrhUTy  
   HotKey[index]=cKey; PqO PRf  
   HotKeyMask[index]=cMask; ? V0!N;  
   bAdded=TRUE; #J,?oe=<4  
   KeyCount++; _+vE(:T  
   break; yG`J3++ S  
  } >)&]Ss5J  
 } kX2bU$1Q,i  
 return bAdded; nX|f?5 O  
} :'pLuN  
D[NJ{E.{  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) ~KW|<n4m  
{ \.`;p  
 BOOL bRemoved=FALSE; zB?} {@  
 for(int index=0;index<MAX_KEY;index++){ [K\Vc9  
  if(hCallWnd[index]==hWnd){ I)B+h8l72<  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ ds*N1[ *  
    hCallWnd[index]=NULL; 1j9R^  
    HotKey[index]=0; J ^y1=PM  
    HotKeyMask[index]=0; l. 9 i `  
    bRemoved=TRUE; Zt;dPYq>  
    KeyCount--; R-~ZvVw7L  
    break; 7<T1#~w4L  
   } >;$C@  
  } !R;NV|.eI6  
 }  ?)_?YLi  
 return bRemoved; zA ; 7Nv$3  
} J@Qt(rRxi  
5a`f % h%  
void VerifyWindow() >{seaihK  
{ ,m`>  
 for(int i=0;i<MAX_KEY;i++){ 5pNbO[  
  if(hCallWnd!=NULL){ N2yxli  
   if(!IsWindow(hCallWnd)){ $y !k)"k  
    hCallWnd=NULL; D#>+]}5@x  
    HotKey=0; }s;W{Q  
    HotKeyMask=0; xNG 'UbU  
    KeyCount--; ]?P9M<0PM  
   } h.Cr;w,2R  
  } L@*0wx`fU  
 } 76[O3%  
} w$J0/eX{A  
0mB]*<x8  
BOOL CHookApp::InitInstance() @;>TmLs  
{ a jy.K'B*  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); 5TlPs_o  
 hins=AfxGetInstanceHandle(); jd;=5(2  
 InitHotkey(); 'U<-w$!f+^  
 return CWinApp::InitInstance(); 7p"" 5hw  
} K~nk:}3Ui  
J-g#zs  
int CHookApp::ExitInstance() azMrY<  
{ % R~9qO  
 VerifyWindow(); KK-9[S-  
 UnInit(); qX{m7  
 return CWinApp::ExitInstance(); >'#G$f  
} +O23@G?x  
)I<p<HQD  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file X&._<2  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) se](hu~w  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ 2-821Sf#h  
#if _MSC_VER > 1000 _5Q?]-M  
#pragma once wC@5[e$  
#endif // _MSC_VER > 1000 Vm]ltiTVk  
 N7j  
class CCaptureDlg : public CDialog Oqzz9+  
{ rkA0v-N6v  
 // Construction D%cWw0Oq  
 public: <Gzy*1 Q&  
  BOOL bTray; ^=Rqa \;  
  BOOL bRegistered; 'UO,DFq[Fl  
  BOOL RegisterHotkey(); [X:mmM0gd  
  UCHAR cKey; GDC`\cy  
  UCHAR cMask; eW)(u$C|qL  
  void DeleteIcon(); yEUFK  
  void AddIcon(); -}k'a{sj=  
  UINT nCount; S1^u/$*6  
  void SaveBmp(); *zX*k 7LnV  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor ~I6Er6$C^  
  // Dialog Data 'Omi3LXfDT  
  //{{AFX_DATA(CCaptureDlg) ?}sh@;]*h  
  enum { IDD = IDD_CAPTURE_DIALOG }; p2|c8n==  
  CComboBox m_Key; ]B0 >r^  
  BOOL m_bControl; b3e:F{n ^  
  BOOL m_bAlt; w[PWJ! <  
  BOOL m_bShift; "Iu[)O%  
  CString m_Path; 'X{cDdS^  
  CString m_Number; J=>?D@K  
  //}}AFX_DATA (5?5? <  
  // ClassWizard generated virtual function overrides $enh>!mU  
  //{{AFX_VIRTUAL(CCaptureDlg) f&t]O$  
 public: 48M)A  
  virtual BOOL PreTranslateMessage(MSG* pMsg); Ay<'Z6`  
 protected: Fa^5.p  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support 5gW`;Cdbyc  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); W<TW6_*e  
  //}}AFX_VIRTUAL R3F>"(P@tS  
  // Implementation }[Uh4k8P  
 protected: ME~ga,|K  
  HICON m_hIcon; R|H9AM ~E  
  // Generated message map functions 49}yw3-  
  //{{AFX_MSG(CCaptureDlg) ayyn6a8  
  virtual BOOL OnInitDialog(); jD3,z*  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); +Tc4+q!  
  afx_msg void OnPaint(); VE^NSk Oa&  
  afx_msg HCURSOR OnQueryDragIcon(); (6z^m?t?  
  virtual void OnCancel(); 7P9n. [  
  afx_msg void OnAbout(); S5d:?^PGg  
  afx_msg void OnBrowse(); bv0B  
  afx_msg void OnChange(); oM-{)rvQd  
 //}}AFX_MSG k(o[T),_%0  
 DECLARE_MESSAGE_MAP() ;OmmXygl  
}; Y5=~>*e  
#endif 0IBVR,q  
JU:!lyd  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file PC/fb-J  
#include "stdafx.h" ];6c/#2x  
#include "Capture.h" :ORCsl6-  
#include "CaptureDlg.h" wq_c^Ioy  
#include <windowsx.h> b>E%&sf  
#pragma comment(lib,"hook.lib") jpyV52  
#ifdef _DEBUG F }pS'Y  
#define new DEBUG_NEW .=rv,PWjZ  
#undef THIS_FILE p+;Re2Uyg  
static char THIS_FILE[] = __FILE__; ?+GbPG~  
#endif N<hbV0$%  
#define IDM_SHELL WM_USER+1 x +|Fw d  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); K7<'4i~k  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); n=r}jRH1  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; MTb}um.($  
class CAboutDlg : public CDialog Di9yd  
{ x `PIJE  
 public: CSc*UX+  
  CAboutDlg(); b@^M|h.Va  
  // Dialog Data /`hr)  
  //{{AFX_DATA(CAboutDlg) vQ+}rHf`[  
  enum { IDD = IDD_ABOUTBOX }; zJI/j _~W  
  //}}AFX_DATA |_F-Abk  
  // ClassWizard generated virtual function overrides Jl Q%+$  
  //{{AFX_VIRTUAL(CAboutDlg) KU-z;}9s  
 protected: 7;;W{W%  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support &Xe r#6~  
  //}}AFX_VIRTUAL #1hT#YN  
  // Implementation 5|m|R"I*Y  
 protected: & /-@R|  
  //{{AFX_MSG(CAboutDlg) y;0.P?Il"  
  //}}AFX_MSG - c<<A.X  
  DECLARE_MESSAGE_MAP() Mn>dI@/gM  
}; E}k#-+u<S4  
#H O\I7m  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) M=yZ5~3  
{ P :lv Z   
 //{{AFX_DATA_INIT(CAboutDlg) kjaz{&P  
 //}}AFX_DATA_INIT m8 0+b8b  
} {N)\It  
P(X#w  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) /T#<g:   
{ *Q!b%DIa$  
 CDialog::DoDataExchange(pDX); UgJlXB|a%2  
 //{{AFX_DATA_MAP(CAboutDlg) n,PHfydqX  
 //}}AFX_DATA_MAP Da-F(^E  
} t)cG_+rJ  
[2i+f <  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) %T'?7^\>  
 //{{AFX_MSG_MAP(CAboutDlg) y{u6t 3  
 // No message handlers <$?:|  
 //}}AFX_MSG_MAP !Q.c8GRUQ  
END_MESSAGE_MAP() EyBdL  
fEVuH]  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) 07(E/A]  
: CDialog(CCaptureDlg::IDD, pParent) #> CN,eiZ  
{ te6[^_k  
 //{{AFX_DATA_INIT(CCaptureDlg) /@3+zpaw X  
  m_bControl = FALSE; T{uktIO/  
  m_bAlt = FALSE; "b1_vA]03  
  m_bShift = FALSE; g,,cV+  
  m_Path = _T("c:\\"); Q~xR'G[N  
  m_Number = _T("0 picture captured."); So`xd *C!  
  nCount=0; 'Fonn  
  bRegistered=FALSE; >F+:ej  
  bTray=FALSE; +B8Ut{l  
 //}}AFX_DATA_INIT MO _9Yi  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 (S2<6Nm8  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); 3\4Cg()  
} c U{LyZp  
PU'v o4  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) 8ZIv:nO$  
{ Rw/G =zV@2  
 CDialog::DoDataExchange(pDX); s &.Z;X  
 //{{AFX_DATA_MAP(CCaptureDlg) SQ.4IWT(hR  
  DDX_Control(pDX, IDC_KEY, m_Key); I?fE=2}9  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); y.O? c &!  
  DDX_Check(pDX, IDC_ALT, m_bAlt); 'R'>`?Nh  
  DDX_Check(pDX, IDC_SHIFT, m_bShift);  >#q|Pjv]  
  DDX_Text(pDX, IDC_PATH, m_Path); ze 4/XR  
  DDX_Text(pDX, IDC_NUMBER, m_Number); 5vpf;  
 //}}AFX_DATA_MAP mdZELRu  
} >|iy= Zn%'  
{'b8;x8h  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) ] !A;-m  
//{{AFX_MSG_MAP(CCaptureDlg) :EO}uP2  
 ON_WM_SYSCOMMAND() t =*K?'ly  
 ON_WM_PAINT() kEXcEF_9P  
 ON_WM_QUERYDRAGICON() 5G!X4%a  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) S5d{dTPq  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) JNu- z:J  
 ON_BN_CLICKED(ID_CHANGE, OnChange) z)0VP QMT  
//}}AFX_MSG_MAP y^nR=Q]_  
END_MESSAGE_MAP() 9.@(&  
-0]aOT--  
BOOL CCaptureDlg::OnInitDialog() }UO,R~q~  
{ =CVw0'yZ  
 CDialog::OnInitDialog(); >ciq4H43Q|  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); _ 4W#6!  
 ASSERT(IDM_ABOUTBOX < 0xF000); ]u,~/Gy  
 CMenu* pSysMenu = GetSystemMenu(FALSE); lvN{R{7 >  
 if (pSysMenu != NULL) $YC~02{  
 { Q?tV:jogY  
  CString strAboutMenu; x'KsQlI/  
  strAboutMenu.LoadString(IDS_ABOUTBOX); zm"\D vN)  
  if (!strAboutMenu.IsEmpty()) [D,:=p`  
  { ]lo1Kw  
   pSysMenu->AppendMenu(MF_SEPARATOR); 4tC_W!?$t  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); G !~BA*  
  } t,+S~Cj|  
 } _qg6( X  
 SetIcon(m_hIcon, TRUE); // Set big icon `u}x:f !  
 SetIcon(m_hIcon, FALSE); // Set small icon 5_`}$"<~  
 m_Key.SetCurSel(0); vq s~a7E-P  
 RegisterHotkey(); c]]F`B  
 CMenu* pMenu=GetSystemMenu(FALSE); -hzza1DP  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); d"78:+  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); Z])_E 6.  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); /'1y`j<  
 return TRUE; // return TRUE unless you set the focus to a control wI4;/w>  
} z(WpOD   
Cm4 *sN.&)  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) g@2.A;N0  
{ -b$OHFL  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) 1FJ[_ l  
 { SSXS  
  CAboutDlg dlgAbout; W~tOH=9>  
  dlgAbout.DoModal(); k~R[5W|'  
 }  SoX V  
 else Q7r,5w& cm  
 { s2v*  
  CDialog::OnSysCommand(nID, lParam); Q8x{V_Pot  
 } [Mz;:/  
} =dBrmMh  
f 99PwE(=  
void CCaptureDlg::OnPaint()  ?~.&Y  
{ 1 =<|h  
 if (IsIconic()) udFju&!W  
 { ,7P^]V1  
  CPaintDC dc(this); // device context for painting e_], O_ Z  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); E<uOk  
  // Center icon in client rectangle =LxmzQO#  
  int cxIcon = GetSystemMetrics(SM_CXICON); gN(hv.nQ  
  int cyIcon = GetSystemMetrics(SM_CYICON); MPbPq3an  
  CRect rect; MuGg z>CV[  
  GetClientRect(&rect); ef&@aB  
  int x = (rect.Width() - cxIcon + 1) / 2; h<;[P?z  
  int y = (rect.Height() - cyIcon + 1) / 2; =-LX)|x}  
  // Draw the icon "PaGDhS  
  dc.DrawIcon(x, y, m_hIcon); 0@lC5-=  
 } TEyx((SK  
 else f9UaAdJ(  
 { #<Nvy9  
  CDialog::OnPaint(); hxVM]e[  
 } Lc<xgN+cJ  
} I&8SP$S>J  
oxQID  
HCURSOR CCaptureDlg::OnQueryDragIcon() V2{#<d-T!  
{ @z)tC@  
 return (HCURSOR) m_hIcon; _F@p53WE  
} qYZ7Zt;  
>JPJ%~y  
void CCaptureDlg::OnCancel() / 7XdV  
{ i i@1!o  
 if(bTray) qMES<UL>  
  DeleteIcon(); "P5bYq%0v  
  CDialog::OnCancel(); t!~YO'<dS  
} C2rj]t  
KV}U{s+U8  
void CCaptureDlg::OnAbout() 3 9{"T0  
{ H! r Kz  
 CAboutDlg dlg; Pgw%SMEp  
 dlg.DoModal(); U@J/  
} iW1ih Q X  
?h)3S7  
void CCaptureDlg::OnBrowse() $dTfvd  
{ } ndvV~*1  
 CString str; OZ!$%.?l  
 BROWSEINFO bi; zLw h6^?Y  
 char name[MAX_PATH]; b q3fiT9  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); +GYMJK`S+  
 bi.hwndOwner=GetSafeHwnd(); ?3, 64[  
 bi.pszDisplayName=name; s>@#9psm  
 bi.lpszTitle="Select folder"; FW)^O%2s  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; ?FV7|)f  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); j&[.2PW\  
 if(idl==NULL) vbA7I<;  
  return;  m-'(27  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); 7t-*L}~WA  
 str.ReleaseBuffer(); Qw<kX*fxrI  
 m_Path=str;  9VUm=Z#`  
 if(str.GetAt(str.GetLength()-1)!='\\') N=Uc=I7C  
  m_Path+="\\"; -S,ir  
 UpdateData(FALSE); Dl zmAN  
} p_5>?[TW:  
t}XB|h  
void CCaptureDlg::SaveBmp() cCh0?g7nV  
{ 2JA&{ch  
 CDC dc; k?["F%)I  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); y4/>Ol]  
 CBitmap bm; +f\pk \Ith  
 int Width=GetSystemMetrics(SM_CXSCREEN); v$)@AE  
 int Height=GetSystemMetrics(SM_CYSCREEN); K/wiL69  
 bm.CreateCompatibleBitmap(&dc,Width,Height); 7"n)/;la  
 CDC tdc; Q.9Ph ~  
 tdc.CreateCompatibleDC(&dc); ayH%  qp  
 CBitmap*pOld=tdc.SelectObject(&bm); T6R7,Vt'v  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); 9B+ zJ Vte  
 tdc.SelectObject(pOld); Ufaqhh  
 BITMAP btm; h/1nm U]  
 bm.GetBitmap(&btm); f/0v' Jt  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; 2H?I'<NoC  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); mEB2RLCM  
 BITMAPINFOHEADER bih; 8K@"B  
 bih.biBitCount=btm.bmBitsPixel; "[Qb'9/Jc  
 bih.biClrImportant=0; ^_*jp[!`b$  
 bih.biClrUsed=0; `z-H]fU  
 bih.biCompression=0; <+? Y   
 bih.biHeight=btm.bmHeight; $Yx6#m}[M  
 bih.biPlanes=1; 'R4>CZ%jV  
 bih.biSize=sizeof(BITMAPINFOHEADER); RwAbIXG{0  
 bih.biSizeImage=size; Y!Uu173  
 bih.biWidth=btm.bmWidth; jiA5oX^g  
 bih.biXPelsPerMeter=0; sR"zRn  
 bih.biYPelsPerMeter=0; ( }]37  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); <qbZG}u  
 static int filecount=0; L4YVH2`0)  
 CString name; ]]p19[4s  
 name.Format("pict%04d.bmp",filecount++); 93Mdp9v+i  
 name=m_Path+name; '2|1%NSW9  
 BITMAPFILEHEADER bfh; ! Q|J']|  
 bfh.bfReserved1=bfh.bfReserved2=0; F=oHl@  
 bfh.bfType=((WORD)('M'<< 8)|'B'); .sd B3x  
 bfh.bfSize=54+size; jIAW-hc]  
 bfh.bfOffBits=54; S2J#b"Y  
 CFile bf; 6 QN1+MwB  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ c;c:Ea5  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); KWFyw>*)  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); 8w)e/*:j  
  bf.WriteHuge(lpData,size); `4VO&lRm  
  bf.Close(); H|PrsGW  
  nCount++; Ms.PO{wb  
 } >Hdjsu5{N  
 GlobalFreePtr(lpData); LQh^; ]^(  
 if(nCount==1) jA4PDHf+  
  m_Number.Format("%d picture captured.",nCount); #V<`U:.  
 else {iA^rv|  
  m_Number.Format("%d pictures captured.",nCount); +VSZhg,Np8  
  UpdateData(FALSE); sW;7m[o  
} = y?#^  
~_ *H)|  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) ~k9O5S{  
{ WI,40&<  
 if(pMsg -> message == WM_KEYDOWN) .|T2\M  
 { (l Lu?NpIi  
  if(pMsg -> wParam == VK_ESCAPE) @q,)fBZq  
   return TRUE; {UP'tXah  
  if(pMsg -> wParam == VK_RETURN) M[A-1]'  
   return TRUE; pp(H PKs=}  
 } FI\IY R  
 return CDialog::PreTranslateMessage(pMsg); $np=eT)  
} ft{W/ * +_  
O4T'o.  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) v#zPH5xo  
{ 1XG$ z@NN  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ /E)9v$!  
  SaveBmp(); i#k-)N _$  
  return FALSE; zEy&4Kl{+  
} l$M$o(  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ !;i*\ a  
 CMenu pop;  for {  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); &(g|="T  
 CMenu*pMenu=pop.GetSubMenu(0); QW2?n`Fa9-  
 pMenu->SetDefaultItem(ID_EXITICON); PCtkjd  
 CPoint pt; q&Q/?g>f  
 GetCursorPos(&pt); 9GThyY  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); /M:H9Z8!  
 if(id==ID_EXITICON) T: U4:"  
  DeleteIcon(); `Z:3` 7c  
 else if(id==ID_EXIT) QeL{Wa-2F  
  OnCancel(); WJAYM2 6\  
 return FALSE; Fqo&3+J4  
} }S,-uggz  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); 3x![ 8 x  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) prUHjS  
 AddIcon(); sW?B7o?  
 return res; ^1.7Juvb  
} y<|)'(  
s{ =5-:  
void CCaptureDlg::AddIcon() *E}Oh  
{ ?NlSeh  
 NOTIFYICONDATA data; /tP7uVL R  
 data.cbSize=sizeof(NOTIFYICONDATA); gGmxx,i  
 CString tip; _-/x;C  
 tip.LoadString(IDS_ICONTIP); v~}5u 5 $O  
 data.hIcon=GetIcon(0); N#UXP5C(  
 data.hWnd=GetSafeHwnd(); K@6`-|I  
 strcpy(data.szTip,tip); .liyC~YW  
 data.uCallbackMessage=IDM_SHELL; WO@H*  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; ) \ 4 |  
 data.uID=98; izf~w^/  
 Shell_NotifyIcon(NIM_ADD,&data); "7d.i(vw  
 ShowWindow(SW_HIDE); 7 5|pp  
 bTray=TRUE; AFm,CINa  
} =-qf;5[|  
)tD6=Iz^5  
void CCaptureDlg::DeleteIcon() q3)wr%!k5D  
{ LE K/mCL  
 NOTIFYICONDATA data; lbS?/f  
 data.cbSize=sizeof(NOTIFYICONDATA); <m0{'xw  
 data.hWnd=GetSafeHwnd(); ]\BUoQ7I/  
 data.uID=98; q & b5g !  
 Shell_NotifyIcon(NIM_DELETE,&data); \vVSh  
 ShowWindow(SW_SHOW); 's.~$  
 SetForegroundWindow(); MRs,l'  
 ShowWindow(SW_SHOWNORMAL); sB6dp D  
 bTray=FALSE; 7]s%r ya  
} 1ef'7a7e8  
~ezCu_  
void CCaptureDlg::OnChange() 4V$fGjJ3  
{ k2p'G')H  
 RegisterHotkey(); 4\6: \  
} |s f*hlrJ  
!| xZ6KV  
BOOL CCaptureDlg::RegisterHotkey() E:w:4[neh  
{ Sl>>SP  
 UpdateData(); k_?~<vTM  
 UCHAR mask=0; ,H39V+Y*  
 UCHAR key=0; !)c=1EX]"  
 if(m_bControl) x2k*| =$  
  mask|=4; RqLNp?V%  
 if(m_bAlt) LeHiT>aX!  
  mask|=2; 8bOT*^b$H  
 if(m_bShift) 6>,# 6{?jl  
  mask|=1; 6^E`Sa! s  
  key=Key_Table[m_Key.GetCurSel()]; ~;unpym'  
 if(bRegistered){ kXwi{P3D$  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); p7C!G1+z  
  bRegistered=FALSE; O@jqdJu  
 } ,J(lJ,c  
 cMask=mask; <'&F;5F3V  
 cKey=key; `*yAiv>  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); -;pOh;WG  
 return bRegistered; ArzDI{1  
} ZJ(rG((!  
 AmcC:5  
  四、小结 =& -[TPW  
~HmxEk9  
  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
欢迎提供真实交流,考虑发帖者的感受
认证码:
验证问题:
10+5=?,请输入中文答案:十五