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
  • 5515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: `,Y[Z  
  ^/C $L8#  
  一、实现方法 {#1j"  
2'<=H76  
  热键管理DLL实际上是一个键盘钩子,由它来监视系统的键盘事件。如果有和程序登记符合的按键组合就通知该程序的窗口。为了应用方便,本实例把它做成了一个标准的管理库来为其它的程序通过热键服务,它有两个输出函数:AddHotkey()和DeleteHotkey(),程序只需要调用这两个函数就可以了,如果编译之后不用改变热键,则只需要AddHotkey就可以了。DLL中的所有的全局变量都放在一个共享段中,定义如下: De nt?  
Awa|rIM  
#pragma data_seg("shareddata") |v$%V#Bo  
HHOOK hHook =NULL; //钩子句柄 -<51CDw,  
UINT nHookCount =0; //挂接的程序数目 UhSh(E8p>  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 71l"m^Z3zy  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 5Hwo)S]r  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey VqClM  
static int KeyCount =0; y^!E "  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 D,dHP-v  
#pragma data_seg() +-aU+7tu  
=l8!VJa  
  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。 `?]rr0.}hp  
uojh%@.4  
  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: ! nCjA\$  
xv$)u<Ve  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR JXL9Gge  
cKey,UCHAR cMask) @Xve qUUU  
{ S"P9Nf?9  
 BOOL bAdded=FALSE; ;;YcuzQI3  
 for(int index=0;index<MAX_KEY;index++){ oF;%^XFp  
  if(hCallWnd[index]==0){ Foe>}6~{?  
   hCallWnd[index]=hWnd; dgco*TIGO  
   HotKey[index]=cKey; v;fJM5PA  
   HotKeyMask[index]=cMask; s ~Lfi.  
   bAdded=TRUE; ~[zFQ)([  
   KeyCount++; -OrY{^F  
   break; b$v[@"1  
  } ntj`+7mw  
 } lk[G;=K:.  
 return bAdded; B0)`wsb_  
} 8 _4l"v p  
//删除热键 oI_oz0nHk  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) -v;n"Zy1  
{ F<yy>Wf  
 BOOL bRemoved=FALSE; s-C!uq  
 for(int index=0;index<MAX_KEY;index++){ cXk6e.Uz  
  if(hCallWnd[index]==hWnd){ ha|@ X p  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ .Na&I)udX.  
    hCallWnd[index]=NULL; S9HBr  
    HotKey[index]=0; -}Cc"qm  
    HotKeyMask[index]=0; }z%OnP  
    bRemoved=TRUE; selP=Q!  
    KeyCount--; +z:CZ(fb  
    break; b|sc'eP#?  
   } @PPR$4  
  } (ve+,H6w\  
 } ]~ !X iCqu  
 return bRemoved; *?_qE  
} cc|CC Zl  
*.m{jgi1X  
r"{Is?yKe  
  DLL中的钩子函数如下: 6kt]`H`cfJ  
\}$*}gW[}  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) i1qS ns  
{ Jo{ zy  
 BOOL bProcessed=FALSE; ~~C6)N~1  
 if(HC_ACTION==nCode) 0).fBBNG  
 { T!l mO?Q  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 i>Z|6 5  
   switch(wParam) Lw>-7)  
   {  F8{ldzh  
    case VK_MENU: VLcyPM@"Q!  
     MaskBits&=~ALTBIT; 0LWdJ($?  
     break; j|VXC(6 P,  
    case VK_CONTROL: 81g9ZV(4  
     MaskBits&=~CTRLBIT; Ro'jM0(KE  
     break; CN.6E<9'kK  
    case VK_SHIFT: \f(Y:}9  
     MaskBits&=~SHIFTBIT; / <JY:1|  
     break; 5oz>1  
    default: //judge the key and send message |}_gA  
     break; H1` rM^,%A  
   } \#PP8  
   for(int index=0;index<MAX_KEY;index++){ HUj+-  
    if(hCallWnd[index]==NULL) [O^}rUqq  
     continue; 0TTIaa$  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) CE~r4  
    { f%2%T'Q  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); hzaLx8L  
     bProcessed=TRUE; 9;=q=O/  
    } U r^YG4(  
   } C/F@ ]_y  
  } fd4;mc1T  
  else if((lParam&0xc000ffff)==1){ //有键按下 /@&(P#h  
   switch(wParam) n}19?K]g  
   { -NAmu97V}  
    case VK_MENU: +x(YG(5\w  
     MaskBits|=ALTBIT; hzaU8kb  
     break; RNGO~:k?r  
    case VK_CONTROL: P,(9cyS{  
     MaskBits|=CTRLBIT; ~\2;i]|  
     break; Ll,I-BQ 9  
    case VK_SHIFT: mHKJ  
     MaskBits|=SHIFTBIT; GF&_~48GD  
     break; S#,+Z7  
    default: //judge the key and send message I$n+DwKcN  
     break; +<&E3Or  
   } w{3ycR  
   for(int index=0;index<MAX_KEY;index++){ /K f L+"^|  
    if(hCallWnd[index]==NULL) iBucT"d]  
     continue; v' C@jsx M  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) \H^;'agA  
    { Q*gnAi&.#  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); D>P;Izb  
     bProcessed=TRUE; }@wVW))6$  
    } #+$ zE#je  
   } k=e`*LB\  
  } {o( * f  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 G(3;;F7"  
   for(int index=0;index<MAX_KEY;index++){ /^Y[*5  
    if(hCallWnd[index]==NULL) GjEqU;XBi  
     continue; G%;kGi`m  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) 6;gLwOeOHY  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); 1t.R+1[c  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 sa G8g  
   } x.ba|:5  
  } hqL+_| DW  
 } z?)He)d  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); /N>} 4Ay  
} {#N%Bq}  
}B`Ku5 M  
  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: *,17x`1e  
t ^m~  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); "v5ElYG  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); e^zHw^js  
opXDm\  
  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: [,rn3CA  
(Izf L1  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) %yfE7UPS]  
{ iUTU*El>  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) f~q4{  
 { L"^OdpOs  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 5Dd:r{{ Q  
  SaveBmp(); s"WBw'_<<  
  return FALSE; $C u R}g  
 } w-ALCh8o  
 …… //其它处理及默认处理 Fwb5u!_,  
} ypl G18  
D*QYKW=)  
D^|9/qm$  
  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。 K3L"^a  
yPoSJzC=[  
  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。 gGEIK0\{  
eeW`JG-E  
  二、编程步骤 Kk=LXmL2  
Yk'm?p#~  
  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"; ywO mQcZ  
n}JPYu  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; 9Sz7\W0  
ALXTR%f  
  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; TdFT];:  
wG8 nw;  
  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; &))\2pl  
0elxA8Z~e  
  5、 添加代码,编译运行程序。 vQgq]mA?  
BZ+;n |<r  
三、程序代码 6Hk="$6K  
~>g+2]Bn>$  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL -9d%+O~v6~  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) f}iU& 3S  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ dw9T f^V  
#if _MSC_VER > 1000 +P)ys#=  
#pragma once Wo!;K|~P  
#endif // _MSC_VER > 1000 u h )o  
#ifndef __AFXWIN_H__ {n&Uf{  
#error include 'stdafx.h' before including this file for PCH k3>YBf`fC  
#endif W:vr@e6  
#include "resource.h" // main symbols cDIBDC  
class CHookApp : public CWinApp APq7 f8t  
{ E{% SR  
 public: mlB~V3M'G  
  CHookApp(); moZm0` WR  
  // Overrides D"^'.DL@wG  
  // ClassWizard generated virtual function overrides e)b%`ntF  
  //{{AFX_VIRTUAL(CHookApp) y3JMbl[S0  
 public: Ac`;st%l.  
  virtual BOOL InitInstance(); T<yb#ak  
  virtual int ExitInstance(); KmmQ,e%  
  //}}AFX_VIRTUAL 2khh4?|\  
  //{{AFX_MSG(CHookApp) e;h,V(  
  // NOTE - the ClassWizard will add and remove member functions here. 4-^[%&>}  
  // DO NOT EDIT what you see in these blocks of generated code ! 0[Eb .2I  
  //}}AFX_MSG )+EN$*H  
  DECLARE_MESSAGE_MAP() |>+uw|LtZ  
}; |##GIIv;i  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); (%'9CfPx  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); .Y\EE;8%  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); Ee)xnY%(  
BOOL InitHotkey(); gCJIIzl%Bh  
BOOL UnInit(); jn=:G+0  
#endif Ilq=wPD}j  
R5(T([w'  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. RB$ z]/=  
#include "stdafx.h" [Y8S[YY  
#include "hook.h" q7_+}"i  
#include <windowsx.h> (s&&>M]r_  
#ifdef _DEBUG ? JXa~.dA  
#define new DEBUG_NEW  #^0(  
#undef THIS_FILE g) 1X&>  
static char THIS_FILE[] = __FILE__; dYF=c   
#endif %u!b& 5]e  
#define MAX_KEY 100 !MV@) (.  
#define CTRLBIT 0x04 v* ~3Z1  
#define ALTBIT 0x02 suVmg-d  
#define SHIFTBIT 0x01 FFvCi@oT  
#pragma data_seg("shareddata") NBOCt)C;H  
HHOOK hHook =NULL; r4Q|5kT*i  
UINT nHookCount =0; S|AjL Ng#  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey O|'1B>X  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT }r3~rG<D71  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey K 1W].(-@4  
static int KeyCount =0; !20X sO  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift Bp_wnd  
#pragma data_seg() H=~9CJ+tc  
HINSTANCE hins; (MLhaux-  
void VerifyWindow(); +@:L|uFU  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) , ;jGJr  
//{{AFX_MSG_MAP(CHookApp) m3 -9b"  
// NOTE - the ClassWizard will add and remove mapping macros here. *9 D!A  
// DO NOT EDIT what you see in these blocks of generated code! ^sClz*%?  
//}}AFX_MSG_MAP q>s`uFRg(  
END_MESSAGE_MAP() iqPBsIW  
'*T]fND4  
CHookApp::CHookApp() LW:1/w&pv  
{ 5-vo0:hk  
 // TODO: add construction code here, "pvH0"Q*  
 // Place all significant initialization in InitInstance %l !xkCKA  
} OZ(dpV9.S  
xDjV `E]  
CHookApp theApp; T?wzwGp-[  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) |"Z{I3Umg  
{ qLK?%?.N<  
 BOOL bProcessed=FALSE; Jp~zX lu  
 if(HC_ACTION==nCode) X.V[0$.;  
 { i$uN4tVKT  
  if((lParam&0xc0000000)==0xc0000000){// Key up .%}+R|g  
   switch(wParam) ]Kh2;>= Xj  
   { .F2 :!h$  
    case VK_MENU: /,tAoa~FA  
     MaskBits&=~ALTBIT; FHg0E++?  
     break; 6v732;^  
    case VK_CONTROL: >: Wau  
     MaskBits&=~CTRLBIT; A)NkT`<)  
     break; 2`bdrRD0  
    case VK_SHIFT: =RKSag&  
     MaskBits&=~SHIFTBIT; f.xA_Y>  
     break; 8dO?K*J,H'  
    default: //judge the key and send message E6A /SVp  
     break; ;[ 'a  
   } B\CN<<N>dD  
   for(int index=0;index<MAX_KEY;index++){ o\=n4;S  
    if(hCallWnd[index]==NULL) HdX2YPYn;  
     continue; bGmx7qt#  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) zm#nV Y`  
    {  .\:J~(  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); L%\b'fs  
     bProcessed=TRUE; 2A:,;~UH  
    } A9:NKY{z  
   } E"PcrWB&  
  } nJFg^s 1  
  else if((lParam&0xc000ffff)==1){ //Key down cgT  
   switch(wParam) s0"e'  
   { u{e-G&]^;  
    case VK_MENU: TzG]WsY_  
     MaskBits|=ALTBIT; o l ({AYB  
     break; sen=0SB/  
    case VK_CONTROL: UKBJ_r  
     MaskBits|=CTRLBIT; 6lFfS!ZFA  
     break; rf K8q'@  
    case VK_SHIFT: Ol/N}M|3  
     MaskBits|=SHIFTBIT; n"D ?I  
     break; xge7r3i  
    default: //judge the key and send message #JW+~FU`  
     break; 9pSUIl9|j  
   } Ud(`V:d  
   for(int index=0;index<MAX_KEY;index++) ~mp0B9L%  
   { 1KE:[YQ1  
    if(hCallWnd[index]==NULL) H)(jh  
     continue; rZ03x\2  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) -ysn&d\rV  
    { 7jG(<!,  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); ROb\Rx m  
     bProcessed=TRUE; 19U]2D/z  
    }  kLP0{A  
   } UQ?%|y*Kc  
  } X$n(-65  
  if(!bProcessed){ zu\`1W^  
   for(int index=0;index<MAX_KEY;index++){ 7/Il L  
    if(hCallWnd[index]==NULL) 3iNkoBCg  
     continue; @%ECj)u`O  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) f'Mop= .  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); ,_ 2x{0w:>  
   } K\?]$dK5  
  } DBH#)4do@  
 } k;^ :  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); uE5X~  
} P:xT0gtt  
hpbf&S4  
BOOL InitHotkey() 8Cx^0  
{ 1Y j~fb(  
 if(hHook!=NULL){ YK#fa2ng  
  nHookCount++; Dl\`  
  return TRUE; b1?xeG#  
 } |V,<+BEi  
 else *f+: <=i  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); mEAXM 1J|  
  if(hHook!=NULL) @x&P9M0g  
   nHookCount++; E,[xUz"  
  return (hHook!=NULL); &(pjqV  
} Lxl_"k G  
BOOL UnInit() HLK@xKD<  
{ _8?o'<!8?^  
 if(nHookCount>1){ )xU-;z0"~  
  nHookCount--; 6;b9swmh  
  return TRUE; XP?rOOn  
 } $iw%(H  
 BOOL unhooked = UnhookWindowsHookEx(hHook); %yS3&Ju  
 if(unhooked==TRUE){ cntco@  
  nHookCount=0; H*I4xT@  
  hHook=NULL; b7:0#l$  
 } s][24)99  
 return unhooked; [U{UW4  
} %eWqQ3{P]  
}Fb!?['G5  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) kL*0M<0 (  
{ qdD)e$XW,  
 BOOL bAdded=FALSE; N@T.T=r  
 for(int index=0;index<MAX_KEY;index++){ 9WG{p[  
  if(hCallWnd[index]==0){ vIGw6BJI  
   hCallWnd[index]=hWnd; (8a#\Y[b  
   HotKey[index]=cKey; pbXi9|bI  
   HotKeyMask[index]=cMask; 1 jb/o5n;  
   bAdded=TRUE; F\JUx L@8  
   KeyCount++; K95;rd  
   break; %3Z/+uT@v]  
  } kSncZ0K{  
 } e&<yX  
 return bAdded; 0ezYdS~o  
} {Tp2H_EG  
6=GZLpv  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) YUWn;#  
{ W&Y"K)`  
 BOOL bRemoved=FALSE; VyLH"cCv  
 for(int index=0;index<MAX_KEY;index++){ (=x"Y{%  
  if(hCallWnd[index]==hWnd){ D@ek9ARAq  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ I27,mS+]  
    hCallWnd[index]=NULL; F =a+z/xKT  
    HotKey[index]=0; QCOo  
    HotKeyMask[index]=0; j{++6<tr  
    bRemoved=TRUE; A#wEuX=[  
    KeyCount--; I3b"|%  
    break; [I*! lbt  
   } mB'3N;~  
  } jdA ]2]  
 } v-j3bB  
 return bRemoved; Y$>-%KcKeI  
} }GwVKAjP  
3 fj  
void VerifyWindow() p/6zEZ*  
{ p zw8T  
 for(int i=0;i<MAX_KEY;i++){ c7uG9  
  if(hCallWnd!=NULL){ ~"x5U{K48S  
   if(!IsWindow(hCallWnd)){ <!d"E@%v@  
    hCallWnd=NULL; "8f?h%t  
    HotKey=0; j V3)2C}  
    HotKeyMask=0; h!@,8y[B  
    KeyCount--; JtKp(k&  
   } <i?a0  
  } ^Mkk@F&1  
 } ;!>Wz9  
} Xf'=+f2p  
`(y(w-:W1  
BOOL CHookApp::InitInstance() ,U,By~s  
{ sUkm|K`#  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); 6rti '  
 hins=AfxGetInstanceHandle(); )KSoq/  
 InitHotkey(); K+\nC)oG  
 return CWinApp::InitInstance(); d[gl]tj9  
} 3L>IX8_   
'_s}o<  
int CHookApp::ExitInstance() {Bvj"mL]j  
{ F?+3%>/A @  
 VerifyWindow(); {BBw$m,o  
 UnInit(); RrrK*Fk8=  
 return CWinApp::ExitInstance(); W[bmzvJ_X  
} ;E;To\NCYF  
E`\8TqO  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file C2U~=q>>  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) rt-\g1x  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ Pf_F59"  
#if _MSC_VER > 1000 4p`XG1Pt  
#pragma once #EO1`9f48x  
#endif // _MSC_VER > 1000 e9pOisZ;8  
l*aj#%ha  
class CCaptureDlg : public CDialog yGBQ0o7E  
{ jF ^5}5U  
 // Construction od<b!4k~s  
 public:  cc=gCE  
  BOOL bTray; l U]un&[N  
  BOOL bRegistered; rsNf$v-*  
  BOOL RegisterHotkey(); BbOu/i|  
  UCHAR cKey; or*HC&c7  
  UCHAR cMask; =v~1qWX  
  void DeleteIcon(); AnsjmR:Jv  
  void AddIcon(); _o6G6e,  
  UINT nCount; & -l8n^  
  void SaveBmp(); |[xi/Q^7  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor BG`s6aC|z<  
  // Dialog Data 0 >Z ;Ni  
  //{{AFX_DATA(CCaptureDlg) =s97Z-  
  enum { IDD = IDD_CAPTURE_DIALOG }; VL+C&k v]  
  CComboBox m_Key; $& ~;@*[  
  BOOL m_bControl; D87|q4  
  BOOL m_bAlt; &-yGVx  
  BOOL m_bShift; &a)eJF]:!  
  CString m_Path; q0mOG^  
  CString m_Number; l;X|=eu'  
  //}}AFX_DATA ?9MVM~$  
  // ClassWizard generated virtual function overrides 10[Jl5+t  
  //{{AFX_VIRTUAL(CCaptureDlg) yq[Cq=rBk  
 public: R0Ue0pF7  
  virtual BOOL PreTranslateMessage(MSG* pMsg); zJlQ_U-!  
 protected: Yj(4&&Q  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support 7^TV~E#  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); Iry  
  //}}AFX_VIRTUAL 4NR@u\S  
  // Implementation X&m'.PA  
 protected: U]~^ZR  
  HICON m_hIcon; :& XH?/Wi  
  // Generated message map functions u`:hMFTID  
  //{{AFX_MSG(CCaptureDlg) 0[A9b,MMVO  
  virtual BOOL OnInitDialog(); (P|~>k  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); 5r {;CKKz  
  afx_msg void OnPaint(); "VxWj}+]  
  afx_msg HCURSOR OnQueryDragIcon(); ,{eU P0]  
  virtual void OnCancel(); h&@R| N  
  afx_msg void OnAbout(); Y$8JM  
  afx_msg void OnBrowse(); +#J,BKul  
  afx_msg void OnChange(); ~}ml*<z@  
 //}}AFX_MSG dj6*6qX0'^  
 DECLARE_MESSAGE_MAP() 4pU>x$3$  
}; D<{{ :7n  
#endif !G5a*8]  
~|Y>:M+0Z  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file &:B<Q$g#  
#include "stdafx.h" B#%; Qc  
#include "Capture.h" V_n<?9^4  
#include "CaptureDlg.h" X26   
#include <windowsx.h> f3*?MXxb16  
#pragma comment(lib,"hook.lib") K!AAGj`  
#ifdef _DEBUG /(C~~XP)  
#define new DEBUG_NEW +?D6T!)  
#undef THIS_FILE qf)$$qi  
static char THIS_FILE[] = __FILE__; vC;]jJb:  
#endif 'BMy8  
#define IDM_SHELL WM_USER+1 $K~LM8_CKy  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); $3+PbYY  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); m(OvD!  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; 36m5bYMd)  
class CAboutDlg : public CDialog yI{5m^s{  
{ _A_ A$N~9  
 public: p\v Mc\  
  CAboutDlg(); gieJ}Bv  
  // Dialog Data Ft JjY@#  
  //{{AFX_DATA(CAboutDlg) M&Y .;  
  enum { IDD = IDD_ABOUTBOX }; tCF&OOI4`  
  //}}AFX_DATA 0"k |H&  
  // ClassWizard generated virtual function overrides [p r"ZQ]  
  //{{AFX_VIRTUAL(CAboutDlg) Y]`.InG@  
 protected: 6qvp*35Cx  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support E9! N>0  
  //}}AFX_VIRTUAL rd|uz4d  
  // Implementation Z^KA  
 protected: bBxw#_3A?E  
  //{{AFX_MSG(CAboutDlg) G`=r^$.3WB  
  //}}AFX_MSG eDO!^.<5  
  DECLARE_MESSAGE_MAP() eEc4bVQa  
}; 1[nG}  
AF\T\mtvRm  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) C"T1MTB  
{ J<n+\F-s  
 //{{AFX_DATA_INIT(CAboutDlg) ;+"f  
 //}}AFX_DATA_INIT LS>G4 ]  
} wgeNs9L  
pj|pcv^  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) Q'B6^%:<~  
{ ?@6b>='!  
 CDialog::DoDataExchange(pDX); q(^Q3  
 //{{AFX_DATA_MAP(CAboutDlg) :bU(S<%M  
 //}}AFX_DATA_MAP Ac k}QzXO  
} f5RE9%.#~  
+~Cy$M CX  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) F r?z"  
 //{{AFX_MSG_MAP(CAboutDlg) e59dVFug.U  
 // No message handlers P3tx|:gV  
 //}}AFX_MSG_MAP G1T^a>tj4  
END_MESSAGE_MAP() Q'apG)0I  
8 }'|]JK  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) 3. WF}8  
: CDialog(CCaptureDlg::IDD, pParent) 8U2dcx:G3  
{ VU|dV\>  
 //{{AFX_DATA_INIT(CCaptureDlg) )n7l'}o?+  
  m_bControl = FALSE; )YW<" $s  
  m_bAlt = FALSE; 79J-)e9  
  m_bShift = FALSE; 1,y&d}GW  
  m_Path = _T("c:\\"); DLE8+NV8   
  m_Number = _T("0 picture captured."); vy@rQC %9  
  nCount=0; ] 7;f?+  
  bRegistered=FALSE; ][PzgzG  
  bTray=FALSE; ~o3Hdd_#}N  
 //}}AFX_DATA_INIT }WFf''Z-  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 }7<5hn E  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); Zwt;d5U  
} D6D1S/:ij'  
Z~G my7h(  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) 9W*+SlH@ !  
{ 6Q|k7*,B  
 CDialog::DoDataExchange(pDX); $*[{J+t_  
 //{{AFX_DATA_MAP(CCaptureDlg) :y]Omp  
  DDX_Control(pDX, IDC_KEY, m_Key); \@a$'   
  DDX_Check(pDX, IDC_CONTROL, m_bControl);  Rxpn~QQ  
  DDX_Check(pDX, IDC_ALT, m_bAlt); K2_Qu't0$  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); Weoj|0|t  
  DDX_Text(pDX, IDC_PATH, m_Path); VUU]Pu &  
  DDX_Text(pDX, IDC_NUMBER, m_Number); \79X{mcd  
 //}}AFX_DATA_MAP _=6 rE  
} w [>;a.$  
_S0+;9fhY  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) ajhEL?%D  
//{{AFX_MSG_MAP(CCaptureDlg) z:Sigo_z[  
 ON_WM_SYSCOMMAND() H2gj=krK  
 ON_WM_PAINT() {aKqXL[UP  
 ON_WM_QUERYDRAGICON() F#|O@.tDG  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) P'@<:S|  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse)  84zTCX  
 ON_BN_CLICKED(ID_CHANGE, OnChange) %bXx!x8(  
//}}AFX_MSG_MAP OY-w?'p?W  
END_MESSAGE_MAP() 6+rlXmd  
F^aR+m  
BOOL CCaptureDlg::OnInitDialog() 4] > ]-b  
{ `WEZ"5n  
 CDialog::OnInitDialog(); =iB,["s  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); 9D\4n  
 ASSERT(IDM_ABOUTBOX < 0xF000); Uh}seB#mJj  
 CMenu* pSysMenu = GetSystemMenu(FALSE); d87vl13  
 if (pSysMenu != NULL) PrQ?PvA<L  
 { vEM(bT=H  
  CString strAboutMenu; [a[/_Sf{  
  strAboutMenu.LoadString(IDS_ABOUTBOX); D:\g,\Z  
  if (!strAboutMenu.IsEmpty()) /h2b;"  
  { bte~c  
   pSysMenu->AppendMenu(MF_SEPARATOR); !4"sX+z9  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); fpyz'   
  } XK(`mEi  
 } +KGZ HO!  
 SetIcon(m_hIcon, TRUE); // Set big icon I<b?vR 'F  
 SetIcon(m_hIcon, FALSE); // Set small icon VvbFp  
 m_Key.SetCurSel(0); MWk:sBCqr  
 RegisterHotkey(); Wx'Kp+9'  
 CMenu* pMenu=GetSystemMenu(FALSE); +eX)48  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); S&C1TC  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); EUYCcL'G  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); 1x J TWWj-  
 return TRUE; // return TRUE unless you set the focus to a control GnXNCeE`  
} ivgpS5 M`Y  
vh!v MB}}  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) wu<])&F  
{ Bc-yxjsw  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) SZ![%)83  
 { ({0)@+V8  
  CAboutDlg dlgAbout; v <\A%  
  dlgAbout.DoModal(); " }gVAAvc7  
 } q}uHFp/J  
 else $5`!Z%>/  
 { +Z2MIC|Ud  
  CDialog::OnSysCommand(nID, lParam); m%+IPZ2m  
 } %m5Q"4O  
} {MAQ/5  
h5z)Lc^  
void CCaptureDlg::OnPaint() y@bcYOh3  
{ pb60R|k  
 if (IsIconic()) et,GrL)l  
 { /e\{    
  CPaintDC dc(this); // device context for painting z!QDTIb  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); `+lHeLz':  
  // Center icon in client rectangle =bh*[ , -  
  int cxIcon = GetSystemMetrics(SM_CXICON); ~H)4)r^  
  int cyIcon = GetSystemMetrics(SM_CYICON); $v.C0 x  
  CRect rect; nm$Dd~mxW1  
  GetClientRect(&rect); Thy=yz;p  
  int x = (rect.Width() - cxIcon + 1) / 2; $DFv30 f  
  int y = (rect.Height() - cyIcon + 1) / 2; %,@vWmn  
  // Draw the icon R`Aj|C z  
  dc.DrawIcon(x, y, m_hIcon); wCs3:@UH  
 } 7z6 b@$,  
 else \ A1uhHP!  
 { fHrt+_Zn|  
  CDialog::OnPaint(); yDb'7(3-  
 } >e5 *prx+  
} !U_ K&f  
|6:=}dE#[  
HCURSOR CCaptureDlg::OnQueryDragIcon() $$i. O}  
{ .o%^'m"=D[  
 return (HCURSOR) m_hIcon; )o1eWL}  
} Sydh2d  
,7Y-k'7Kop  
void CCaptureDlg::OnCancel() @4~=CV%j  
{ Dq\ Jz~  
 if(bTray) V{-AP=C7  
  DeleteIcon(); n;HHogA  
  CDialog::OnCancel(); r,SnXjp@  
} 8GPIZh'0 h  
c;f!!3&  
void CCaptureDlg::OnAbout() Z!d7&T}  
{ m4K* <  
 CAboutDlg dlg; P47V:E%  
 dlg.DoModal(); {s?M*_{|  
} 05Fz@31~  
148V2H)  
void CCaptureDlg::OnBrowse() ?[TfpAtQ`  
{ dCYCHHHF  
 CString str; Zt -1h{7  
 BROWSEINFO bi; dBsX*}C  
 char name[MAX_PATH]; h[KvhbD3   
 ZeroMemory(&bi,sizeof(BROWSEINFO)); 7T``-:`[  
 bi.hwndOwner=GetSafeHwnd(); @r(Z%j7  
 bi.pszDisplayName=name; I-D^>\k+  
 bi.lpszTitle="Select folder"; xVB;s.'!  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; vg Ipj3u  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); %z]U LEYrZ  
 if(idl==NULL) *YTo{~  
  return; +.B<Hd  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); t9gfU5?  
 str.ReleaseBuffer(); :pX`?Ew`g  
 m_Path=str; _i_Q?w`  
 if(str.GetAt(str.GetLength()-1)!='\\') C-eA8pYY/  
  m_Path+="\\"; -Ue$T{;RoH  
 UpdateData(FALSE); \mM<\-'p  
} ql{(Lf$  
N(6|yZ<J3M  
void CCaptureDlg::SaveBmp() mM.*b@d-  
{ >DM44  
 CDC dc; V~DMtB7  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); Xm2\0=v5;  
 CBitmap bm; 8VG!TpX/B  
 int Width=GetSystemMetrics(SM_CXSCREEN); -W{DxN1  
 int Height=GetSystemMetrics(SM_CYSCREEN); :%&Q-kk4!  
 bm.CreateCompatibleBitmap(&dc,Width,Height); M6 9 w-  
 CDC tdc; vD/NgRBww  
 tdc.CreateCompatibleDC(&dc); nL@KX>  
 CBitmap*pOld=tdc.SelectObject(&bm); M4LP$N  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); 0l*]L`]L#  
 tdc.SelectObject(pOld); w1x" c>1C  
 BITMAP btm; 'k;4j|<  
 bm.GetBitmap(&btm); B0$:b !  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; ~9^)wCM+  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); <P ,~eX(r  
 BITMAPINFOHEADER bih; @[<nQZw:  
 bih.biBitCount=btm.bmBitsPixel; s..lK "b  
 bih.biClrImportant=0; c@[:V  
 bih.biClrUsed=0; kNqS8R|  
 bih.biCompression=0; z't? ?6  
 bih.biHeight=btm.bmHeight; gXT9 r' k  
 bih.biPlanes=1; .xzEAu;  
 bih.biSize=sizeof(BITMAPINFOHEADER); {u{@ jp  
 bih.biSizeImage=size; ?SQE5Z  
 bih.biWidth=btm.bmWidth; |@?%Ct  
 bih.biXPelsPerMeter=0; !?f5>Bl  
 bih.biYPelsPerMeter=0; _EnwME {@  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); C$Lu]pIL*  
 static int filecount=0; r0t^g9K0  
 CString name; pA.J@,>`}  
 name.Format("pict%04d.bmp",filecount++); >4Y3]6N0.F  
 name=m_Path+name; rD?L  
 BITMAPFILEHEADER bfh; o56`  
 bfh.bfReserved1=bfh.bfReserved2=0; cUqn<Z<n  
 bfh.bfType=((WORD)('M'<< 8)|'B'); # ,uya2!)  
 bfh.bfSize=54+size; %98' @$:0  
 bfh.bfOffBits=54; <99M@ cF  
 CFile bf; ]Y6cwZOe  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ -m'j]1  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); i"zuil  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); jdKOb  
  bf.WriteHuge(lpData,size); I jr\5FA[p  
  bf.Close(); !g~1&Uw1  
  nCount++; 65 z"  
 } ^ &E}r{?  
 GlobalFreePtr(lpData); kp?w2+rz  
 if(nCount==1) 1XG!$ 4DW  
  m_Number.Format("%d picture captured.",nCount); OJT1d-5p  
 else I{JU-J k|  
  m_Number.Format("%d pictures captured.",nCount); 4p%A8%/q  
  UpdateData(FALSE); bn 6WjJ~Z+  
} J{[n?/A{  
7e7 M@8+4  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) DU%w1+u  
{ 1}hIW":3Sr  
 if(pMsg -> message == WM_KEYDOWN) 4%WzIzRb  
 { _(J&aY\  
  if(pMsg -> wParam == VK_ESCAPE) g&dPd7  
   return TRUE; YDC mI@  
  if(pMsg -> wParam == VK_RETURN) hLJM%on  
   return TRUE; z"D.Bm~ ]  
 } 3X9b2RY*L/  
 return CDialog::PreTranslateMessage(pMsg); u4z&!MT}  
} jVLA CWH  
2._X|~0a  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) JvYPC  
{ !8 &=y  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ T5urZq*R  
  SaveBmp(); 86@c't@  
  return FALSE; 3mPjpm  
} :^UFiUzrE  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ 'c\iK=fl  
 CMenu pop; B1]bRxwn?  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1));  zYXV;  
 CMenu*pMenu=pop.GetSubMenu(0); f}guv~K  
 pMenu->SetDefaultItem(ID_EXITICON); =U|N=/y#hJ  
 CPoint pt; 1+b{}d  
 GetCursorPos(&pt); ' |-JWH  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); e\O/H<  
 if(id==ID_EXITICON) '=][J_  
  DeleteIcon(); ~['Kgh_;  
 else if(id==ID_EXIT) /iG*)6*^k  
  OnCancel(); Lb LiB*D#s  
 return FALSE; MO;X>D=  
} e1//4H::t  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); A!1;}x  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) |t$Ma'P  
 AddIcon(); oYWR')8g  
 return res; 0G!]=  
} jYNrD"n  
l & Dxg  
void CCaptureDlg::AddIcon() t|t#vcB  
{ kd"N 29  
 NOTIFYICONDATA data; a^,(v  
 data.cbSize=sizeof(NOTIFYICONDATA); G0E121`h  
 CString tip; ,C3,TkA]  
 tip.LoadString(IDS_ICONTIP); }kg ye2[  
 data.hIcon=GetIcon(0); u!1{Vt87  
 data.hWnd=GetSafeHwnd(); M$f7sx  
 strcpy(data.szTip,tip); RN=` -*E1  
 data.uCallbackMessage=IDM_SHELL; R^{)D3  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; =4d (b ;  
 data.uID=98; HF|oBX$_  
 Shell_NotifyIcon(NIM_ADD,&data); w+1Gs ;  
 ShowWindow(SW_HIDE); @p\}pY$T  
 bTray=TRUE; );-~j  
} O-)-YVU  
" R xP^l  
void CCaptureDlg::DeleteIcon() 0!v ->Dk  
{ 1;<R#>&,*  
 NOTIFYICONDATA data; x@8a''  
 data.cbSize=sizeof(NOTIFYICONDATA); KZ~*Nz+H2  
 data.hWnd=GetSafeHwnd(); G "P4-  
 data.uID=98; f6$b s+oP  
 Shell_NotifyIcon(NIM_DELETE,&data); q -8t'7  
 ShowWindow(SW_SHOW); 3Hf0MAt  
 SetForegroundWindow(); .s$z/Jv  
 ShowWindow(SW_SHOWNORMAL); ;c$J=h]  
 bTray=FALSE; .k,YlFvj  
} CdL< *AH  
0527Wj  
void CCaptureDlg::OnChange() |Ph3#^rM?  
{ "`N-*;*W  
 RegisterHotkey(); \W,I?Kx$  
} KZPEG!-5  
B=|cS;bM$3  
BOOL CCaptureDlg::RegisterHotkey() X$/2[o#g  
{ dH( ('u[  
 UpdateData(); NHlk|Y#6b  
 UCHAR mask=0; q+,Q<2J  
 UCHAR key=0; Jmx Ko+-  
 if(m_bControl) 4@xE8`+b G  
  mask|=4; 1?Z4 K /  
 if(m_bAlt) ;;&}5jcV  
  mask|=2; -W>'^1cR  
 if(m_bShift) n_'{^6*O  
  mask|=1; =-p$jXVW%  
  key=Key_Table[m_Key.GetCurSel()]; 7g_]mG [6  
 if(bRegistered){ 'uy/o)L  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); nB .G  
  bRegistered=FALSE; [=~pe|8:  
 } o6$4/I  
 cMask=mask; sH\5/'?  
 cKey=key; \l~*PG2  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); V^;jJ']  
 return bRegistered; s=CK~+,/  
} w6j/ Dq!  
'] +Uu'a  
  四、小结 DK}"b}Fvq  
%.Q !oYehj  
  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