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
  • 6980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: @&EP& $*  
  <n6/np!  
  一、实现方法 "4"L"lJ   
R0/~) P  
  热键管理DLL实际上是一个键盘钩子,由它来监视系统的键盘事件。如果有和程序登记符合的按键组合就通知该程序的窗口。为了应用方便,本实例把它做成了一个标准的管理库来为其它的程序通过热键服务,它有两个输出函数:AddHotkey()和DeleteHotkey(),程序只需要调用这两个函数就可以了,如果编译之后不用改变热键,则只需要AddHotkey就可以了。DLL中的所有的全局变量都放在一个共享段中,定义如下: ZT^PL3j+  
[Xz7.<0#U  
#pragma data_seg("shareddata") Q'A->I<;_s  
HHOOK hHook =NULL; //钩子句柄 (1Kh9w:^"  
UINT nHookCount =0; //挂接的程序数目 M2oKLRt)L  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 c!841~p(Q  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 /,:32H  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey 0f-gQD  
static int KeyCount =0; E* lqCh  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 @l;f';+  
#pragma data_seg() O]~p)E  
x`o_&09;CG  
  关于共享段,有几点重要的说明:一是必须在链接选项里指定该段为共享:一种方法是在project->settings->link->object/library中加上/section:shareddata,rws;第二种方法是在def文件的sections里加上一句shareddata read write shared;第三种指定共享段的方法在程序里加上一句#pragma comment(linker,"section:shareddata,rws")。二是所有的变量必须初始化,否则链接程序会把它放到普通数据段。三是如果不初始化变量,需要在段外用"__declspec(allocate("shareddata")) 变量类型 变量名"的方式定义。 hOwVm;:  
[6/ %ynlP  
  DLL中的两个输出函数分别用来添加/删除热键,函数代码如下: ol:_2G2xQ  
Pt1Htt:BE  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR aqyXxJS8  
cKey,UCHAR cMask) wwp vmb  
{ Wg$MKc9Vy[  
 BOOL bAdded=FALSE; pkxW19h*0  
 for(int index=0;index<MAX_KEY;index++){ -7pZRnv  
  if(hCallWnd[index]==0){ l[.pI];T  
   hCallWnd[index]=hWnd; !MGQ+bD6  
   HotKey[index]=cKey; Y.}n,y|J}  
   HotKeyMask[index]=cMask; "arbUX~d  
   bAdded=TRUE; gqC:r,a  
   KeyCount++; Gm6^BYCk  
   break; ,$*IJeKx  
  } wiFckF/  
 }  z!F?#L5  
 return bAdded; t;4{l`dk  
} `[:f;2(@  
//删除热键  Ng-3|N  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) Pd@?(WQ  
{ ^$T>3@rDB  
 BOOL bRemoved=FALSE; G4=v2_]  
 for(int index=0;index<MAX_KEY;index++){ 9^aMmN&6N2  
  if(hCallWnd[index]==hWnd){ :_?>3c}L  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ GJ((eAS)  
    hCallWnd[index]=NULL; bF}~9WEa  
    HotKey[index]=0; `U;4O)`n  
    HotKeyMask[index]=0; Nz]\%c/-  
    bRemoved=TRUE; xUeLX`73  
    KeyCount--;  F-ijGGL#  
    break; |~Z+Xl a  
   } M"V?fn'  
  } UCq+F96j  
 } w-\GrxlbX  
 return bRemoved; Y]Xal   
} )9PQ j  
VvPTL8Z  
\.*aC)  
  DLL中的钩子函数如下: lJKU^?4S8  
7d9%L}+q  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) Put +<o <  
{ C"YM"9JSJ  
 BOOL bProcessed=FALSE; YxsW Y7J  
 if(HC_ACTION==nCode) {j^}"8GB  
 { D&]SPhX  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 hZyz5aZ)K  
   switch(wParam) X"[c[YT!%[  
   {  >Ks|yNJ  
    case VK_MENU: #|gt(p]C  
     MaskBits&=~ALTBIT; S(rA96n  
     break; hsVWD,w  
    case VK_CONTROL: 3|@Ske1%Y  
     MaskBits&=~CTRLBIT; O-mP{  
     break; @=@WRPGM*9  
    case VK_SHIFT: !rwv~9I  
     MaskBits&=~SHIFTBIT; QRa>W/N  
     break; g y&B"`  
    default: //judge the key and send message 7 bpV=  
     break; :.Np7[~{  
   } 'KXvn0  
   for(int index=0;index<MAX_KEY;index++){ ,!Q2^R   
    if(hCallWnd[index]==NULL) CM~)\prks  
     continue; 0A|.ch  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) f4:g D*YT  
    { 1'}~;?_  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); zs7K :OlkA  
     bProcessed=TRUE; K72U0}$B  
    } fpzC#  
   } wLNO\JP'  
  } !v94FkS>  
  else if((lParam&0xc000ffff)==1){ //有键按下 b^FB[tZ\x  
   switch(wParam) :~g=n&x  
   { CxwZ$0  
    case VK_MENU: + e4o~ p  
     MaskBits|=ALTBIT; S^~GI$  
     break; >D*L0snjV  
    case VK_CONTROL: +]Ydf^rF  
     MaskBits|=CTRLBIT; \/'u(|G  
     break; *R8q)Q  
    case VK_SHIFT: Bm.%bA>  
     MaskBits|=SHIFTBIT; /Wk\ 6  
     break; LUJKR6oT{>  
    default: //judge the key and send message l*/I ; a$  
     break; _kgw+NA&-H  
   } wD"Y1?Mr  
   for(int index=0;index<MAX_KEY;index++){ \~U8<z  
    if(hCallWnd[index]==NULL) JZN'U<R  
     continue; 41,Mt  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) W}nD#9tL  
    { $I+QyKO9k  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); <{7B ^'  
     bProcessed=TRUE; C:zK{+  
    } FhS:.  
   } ?MyXii<a  
  } e=TB/W_  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 jsc1B  
   for(int index=0;index<MAX_KEY;index++){ De\&r~bTW9  
    if(hCallWnd[index]==NULL) Ll%[}C?~]?  
     continue; $^}?98m  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) }"%tlU!}  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); i,Yv  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 quVTqhg"  
   } vt@.fT#e  
  } @'s^  
 } -AJe\ J 2  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); GR Rv0M  
} -T`rk~A9A  
vG69z&  
  抓图程序是一个基于对话框的程序,它在建立对话框的时候调用前面的DLL,登记热键,因此需要将hook.lib添加到工程里,在程序里给出两个DLL函数的定义,也可以写个头文件,再包含进来以下代码: pjWqI 6,  
{Jwh .bJ  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); ( {5LB4  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); +A3@{ 2  
CsJw;]dYI  
  为了添加应用程序对热键通知事件的响应,程序中用的办法是重载WindowProc()函数,该函数代码如下: x{j|Tf3,G  
J9zSBsp_  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) % sbDH  
{ @|idlIey  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) {-09,Q4[&  
 { IXe[JL:  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 j"9bt GX  
  SaveBmp(); nYLq%7}k  
  return FALSE; u4, p.mZtb  
 } kW3V"twx  
 …… //其它处理及默认处理 #\_N-bVu  
} a4Fe MCvV9  
S{7A3 x'B  
k$j>_U? P  
  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。 6DD"Asi+  
nM>oG'm[n  
  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。 ,dLh`t<\  
%!mJ nc%  
  二、编程步骤 ]ECzb/  
@~qlSU&  
  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"; n&jfJgD&g  
*?VbN}g2  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; q okgu$2  
L Me{5H  
  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; uK2MC?LP  
q~48lxDU  
  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; ~D PjTR  
yO; r]`j0  
  5、 添加代码,编译运行程序。 Az8>^|@  
$h"tg9L^)  
三、程序代码 ?~Fk_#jz,@  
6-c3v  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL :GBWQXb G  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) 3&^4%S{/  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ , `ST Va-  
#if _MSC_VER > 1000 *BF5B\[r?  
#pragma once uQ=p } w  
#endif // _MSC_VER > 1000 u^8:/~8K  
#ifndef __AFXWIN_H__ Y!N *J  
#error include 'stdafx.h' before including this file for PCH M{<cqxY  
#endif u%3D{Dj  
#include "resource.h" // main symbols S!j=hj@qW  
class CHookApp : public CWinApp d[9c6C:<q  
{ AKk6kI8F  
 public: ~ODm?k  
  CHookApp(); g"Mqh!{ FI  
  // Overrides -,C">T%\  
  // ClassWizard generated virtual function overrides D6=Z%h\*  
  //{{AFX_VIRTUAL(CHookApp) L0H;y6&  
 public: F[BJhN*]a  
  virtual BOOL InitInstance(); 4 |9M8ocR  
  virtual int ExitInstance(); [*GIR0  
  //}}AFX_VIRTUAL SSEK9UX  
  //{{AFX_MSG(CHookApp) iZ}  w>1  
  // NOTE - the ClassWizard will add and remove member functions here. |2z?8lx  
  // DO NOT EDIT what you see in these blocks of generated code ! mtu/kd'(  
  //}}AFX_MSG >~8;H x].d  
  DECLARE_MESSAGE_MAP() ;[V_w/-u  
}; _w0t+=&  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); ^1^k<  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); :L*"OT7(6  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); /Uth#s:  
BOOL InitHotkey(); Ab ,n^  
BOOL UnInit(); :vZ8n6J[  
#endif ? FGzw  
J6r"_>)z  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. bw\fKZ  
#include "stdafx.h" &MKG#Y}  
#include "hook.h" 3z';Zwz &X  
#include <windowsx.h> 5 0uYU[W  
#ifdef _DEBUG /`McKYIP  
#define new DEBUG_NEW Dvbrpn!sk  
#undef THIS_FILE q1}HsTnBH  
static char THIS_FILE[] = __FILE__; g`I`q3EF)  
#endif  yV[9 (  
#define MAX_KEY 100 "Ah (EZAR  
#define CTRLBIT 0x04 l$N b1&  
#define ALTBIT 0x02 6bF?2 OC  
#define SHIFTBIT 0x01 sLrSi  
#pragma data_seg("shareddata") Z M_ 6A1  
HHOOK hHook =NULL; ywWF+kR_  
UINT nHookCount =0; qKNX^n;  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey Y7(E<1Yx  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT ChO?Lm$y  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey mO<sw  
static int KeyCount =0; wTb7 xBI  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift Whp;wAz  
#pragma data_seg() 41Bp^R}^/  
HINSTANCE hins; s3@sX_2  
void VerifyWindow(); t>.1,'zb  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) [!1z; /  
//{{AFX_MSG_MAP(CHookApp) {C3AxK0  
// NOTE - the ClassWizard will add and remove mapping macros here. q/w<>u  
// DO NOT EDIT what you see in these blocks of generated code! Ja<pvb  
//}}AFX_MSG_MAP tl9=u-D13@  
END_MESSAGE_MAP() ]k~Vh[[  
NsDJ q{  
CHookApp::CHookApp() ,S[,F0"%  
{ ii&{gC  
 // TODO: add construction code here, x dDR/KS  
 // Place all significant initialization in InitInstance >fHg1d2-  
} &U q++f6  
KzD5>Xf]4$  
CHookApp theApp; o (fZZ`6Y  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) g-lF{Z  
{ 5y-8_)y8o  
 BOOL bProcessed=FALSE; >`L)E,=/  
 if(HC_ACTION==nCode) ."b=dkx  
 { $Lg% CY  
  if((lParam&0xc0000000)==0xc0000000){// Key up %{qJkjG  
   switch(wParam) 5dOA^P@`,M  
   { 6Q S[mWU  
    case VK_MENU: Q-;ltJ  
     MaskBits&=~ALTBIT; nn>< k"  
     break; R-nC+)^  
    case VK_CONTROL: at7|r\`?-  
     MaskBits&=~CTRLBIT; N'hj  
     break; P5M+usx  
    case VK_SHIFT: zWvG];fsN  
     MaskBits&=~SHIFTBIT; R{{d4=:S  
     break; n.zVCKN H  
    default: //judge the key and send message 'A@[a_  
     break; 3?|gBiX  
   } gEC*JbA.3  
   for(int index=0;index<MAX_KEY;index++){ 9Br2}!Ny  
    if(hCallWnd[index]==NULL) ^,S\-Uy9  
     continue; d.y2`wT  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) eveGCV;@  
    { b(&~f@% |  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); +LddW0h+=8  
     bProcessed=TRUE; #:Z"V8n'  
    } XgY( Vv  
   } sX53(|?*  
  } hCRW0 I  
  else if((lParam&0xc000ffff)==1){ //Key down G#n99X@-  
   switch(wParam) T3 xr Ua&  
   { `< 8Fc`;[  
    case VK_MENU: BOqq=WY  
     MaskBits|=ALTBIT; d bU  
     break; h.0Y!'?  
    case VK_CONTROL: XvBEC_xWZ  
     MaskBits|=CTRLBIT; "h.}o DS  
     break; ?m-kpW8  
    case VK_SHIFT: Y68`B"3  
     MaskBits|=SHIFTBIT; 9HMW!DSK`  
     break; <}'hkEh{d=  
    default: //judge the key and send message pKK&+umg  
     break; 3$f%{~3  
   } INwc@XB  
   for(int index=0;index<MAX_KEY;index++) cyUNJw  
   { ( 8+_~_  
    if(hCallWnd[index]==NULL) 1lRqjnzve&  
     continue; 6S?a57;&W  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) ^Q8m) 0DP  
    { n =v4m_e  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); it!i'lG  
     bProcessed=TRUE; !fdni}f)  
    } {#M=gDhbX  
   } u:H@]z(x  
  } ]RHR>=;  
  if(!bProcessed){ PHRc*G{  
   for(int index=0;index<MAX_KEY;index++){ A(AyLxB47*  
    if(hCallWnd[index]==NULL) n0:+D R  
     continue; 3}O.B r|  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) )f#@`lf[<  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); 20gPx;  
   } 6suB!XF;  
  } A?Jm59{w  
 } }8Wp X2U  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); ~h-G  
} =0xuH>WY}w  
b!hxx Z  
BOOL InitHotkey() 6$wS7Cu  
{ ko!38BH`/  
 if(hHook!=NULL){ qS{lay  
  nHookCount++; ,u QLXF2  
  return TRUE; *|AnL}GJ  
 } 6Nx TW  
 else dtjaQsJM^  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); xD#PM |I  
  if(hHook!=NULL) lD2>`s 5  
   nHookCount++; @Zd+XWFw  
  return (hHook!=NULL); }4xxge?r  
} o*/\ oVOq  
BOOL UnInit() l ,)l"6OV  
{ g92M\5 x9  
 if(nHookCount>1){ wbI(o4rXE  
  nHookCount--; &:L8; m  
  return TRUE; {neE(0c  
 } 9\TvX!)h  
 BOOL unhooked = UnhookWindowsHookEx(hHook); tjkY[  
 if(unhooked==TRUE){ *sf9(%j  
  nHookCount=0; ] d| -r:4  
  hHook=NULL; :YjOv  
 } Tp~yn  
 return unhooked; ]>E9v&X0  
} eG # (9  
x@.iDP@(  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) qM@][]j:  
{ [$3Zid  
 BOOL bAdded=FALSE; IC[SJVH;  
 for(int index=0;index<MAX_KEY;index++){ !_<.6ja  
  if(hCallWnd[index]==0){ 7=om /  
   hCallWnd[index]=hWnd; x[nv+n ,  
   HotKey[index]=cKey; [.<nt:  
   HotKeyMask[index]=cMask; eFXxkWR)  
   bAdded=TRUE; -a3+C,I8g  
   KeyCount++; fh$U"  
   break; &{&lCBN  
  } H*|Bukgt/M  
 } &.kg8|s{  
 return bAdded; `(;d+fof  
} A4';((OXy  
V]H<:UE  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) PGT!HdX#{  
{ Tv3ZNh  
 BOOL bRemoved=FALSE; P?n!fA>!  
 for(int index=0;index<MAX_KEY;index++){ O~d!* A  
  if(hCallWnd[index]==hWnd){ @babgP,  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ 9 )B>|#\  
    hCallWnd[index]=NULL; g ^)>-$=  
    HotKey[index]=0; {z@vSQ=)=P  
    HotKeyMask[index]=0; G+[>or}  
    bRemoved=TRUE; aC3\Hs  
    KeyCount--; &:]_a?|*S  
    break; o)}b Fw  
   } 4)2*|w  
  } Ms1\J2  
 } nIph[Vs-Z  
 return bRemoved; r_)-NOp  
} z('93vsO  
nS?HH6H  
void VerifyWindow() ?RWd"JTGue  
{ uNXh"?  
 for(int i=0;i<MAX_KEY;i++){ `k\]I |6  
  if(hCallWnd!=NULL){ yF0,}  
   if(!IsWindow(hCallWnd)){ Z+t?ah00  
    hCallWnd=NULL; r\],5x'xSu  
    HotKey=0; (/"T=`3t  
    HotKeyMask=0; K 1:F{*  
    KeyCount--; 2SG|]=  
   } ^0{S!fs  
  } e@]cI/j  
 } oE)c8rE  
} oK5(,8 (4  
8GlH)J+kq  
BOOL CHookApp::InitInstance() 'Iyk`=R  
{ .v1rrH?  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); h:bs/q+-  
 hins=AfxGetInstanceHandle(); WtRy~5A2  
 InitHotkey(); }f&7<E  
 return CWinApp::InitInstance(); )CR8-z1`  
} 3%EwA\V(  
8QC:ro  
int CHookApp::ExitInstance() w5|@vB/pj  
{ '2[ _U&e  
 VerifyWindow(); ^"buF\3L  
 UnInit(); Bl`e+&b  
 return CWinApp::ExitInstance(); T82=R@7  
} SmR*b2U  
vMRKs#&8  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file 2DV{gF  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) H8\{ GGg  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ fI$, ?>  
#if _MSC_VER > 1000 |?8CV\D!  
#pragma once Q ;k_q3  
#endif // _MSC_VER > 1000 +#B%YK|LR  
A5H[g`&  
class CCaptureDlg : public CDialog !uO|T'u0a  
{ e:7aVOm  
 // Construction ;'o>6I7Ph  
 public: ?N|PgNu X  
  BOOL bTray; @XIwp2A{+  
  BOOL bRegistered; '.kbXw0}  
  BOOL RegisterHotkey(); :cC`wX$  
  UCHAR cKey; {Z?!*Ow  
  UCHAR cMask; z0Zl'  
  void DeleteIcon(); ,JZ@qmQ,  
  void AddIcon(); um8ZhXq  
  UINT nCount; J7cqnj  
  void SaveBmp(); ,RT\&Ze5  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor D1g1"^~g  
  // Dialog Data / TJTu_#  
  //{{AFX_DATA(CCaptureDlg) t]&n_]`{.  
  enum { IDD = IDD_CAPTURE_DIALOG }; ]iNSa{G  
  CComboBox m_Key; v#/,,)m  
  BOOL m_bControl; uPo>?hpq+  
  BOOL m_bAlt; n--`zx-['  
  BOOL m_bShift; %xk]y&jv  
  CString m_Path; M]_vb,=1  
  CString m_Number; \Fj4Gy?MW  
  //}}AFX_DATA [FCNW0NV  
  // ClassWizard generated virtual function overrides =G72`]#-  
  //{{AFX_VIRTUAL(CCaptureDlg) cxv) LOl-  
 public: Hd2_Cg FB  
  virtual BOOL PreTranslateMessage(MSG* pMsg); JGdBpj:  
 protected: 9a4RW}S<  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support ;zJ_apZ:{  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); @%fkW"y:  
  //}}AFX_VIRTUAL <'vM+Lk  
  // Implementation \Fe5<G'v  
 protected: zO\"$8q*  
  HICON m_hIcon; ?PQiVL  
  // Generated message map functions 0y ;gi3W  
  //{{AFX_MSG(CCaptureDlg) c`jTdVD  
  virtual BOOL OnInitDialog(); :8QG$Ua1  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); H{$yy)@F  
  afx_msg void OnPaint(); e| l?NXRX  
  afx_msg HCURSOR OnQueryDragIcon(); 2'}2r ~6  
  virtual void OnCancel(); =VSieh  
  afx_msg void OnAbout(); s3knh&'zb  
  afx_msg void OnBrowse(); i*; V4zh  
  afx_msg void OnChange(); dJ;;l7":~  
 //}}AFX_MSG G?V3lQI1n  
 DECLARE_MESSAGE_MAP() k/mY. 2yPv  
}; V\xQM;  
#endif ?nn,RBS-  
J *B`C^i  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file D2mB4  
#include "stdafx.h" @6tx5D?  
#include "Capture.h" JH5])i0  
#include "CaptureDlg.h" 6x7=0}'  
#include <windowsx.h> g!QumRF  
#pragma comment(lib,"hook.lib") aOuon0  
#ifdef _DEBUG W>Kwl*Cis"  
#define new DEBUG_NEW *>#cs#)  
#undef THIS_FILE tsa6: D  
static char THIS_FILE[] = __FILE__; <;T7q EIlo  
#endif @kK=|(OB'  
#define IDM_SHELL WM_USER+1 s1FBz)yCY=  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); D|BN_ai9  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); ~iSW^mi  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; axl?t|~I  
class CAboutDlg : public CDialog +Q9HsfX/  
{ 2U+&F'&Q  
 public: 0jS/U|0  
  CAboutDlg(); t.TQ@c+,J  
  // Dialog Data oe<Y,%u"6  
  //{{AFX_DATA(CAboutDlg) hh{liS% 10  
  enum { IDD = IDD_ABOUTBOX }; d"cfSH;h  
  //}}AFX_DATA  (M=Br  
  // ClassWizard generated virtual function overrides 4CCux4)N  
  //{{AFX_VIRTUAL(CAboutDlg) 0k>&MkM\^  
 protected: 6]3 ZUH;  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support -,tYfQ;:  
  //}}AFX_VIRTUAL ]aR4U`  
  // Implementation Ij8tBT?jlL  
 protected: 1W8W/Y=hT  
  //{{AFX_MSG(CAboutDlg) O^:h_L  
  //}}AFX_MSG 2=|IOkY  
  DECLARE_MESSAGE_MAP() GwV FD%  
}; @W,Y_8:  
IY:O?M  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) ;0 *^98K  
{ !RD,:\5V  
 //{{AFX_DATA_INIT(CAboutDlg) ;n@C(hG  
 //}}AFX_DATA_INIT h.^DRR^S  
} mc=*wr$  
nX S%>1o,  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) 525 >=h  
{ pSP_cYa#(#  
 CDialog::DoDataExchange(pDX); KWUz]>Z  
 //{{AFX_DATA_MAP(CAboutDlg) 0_EF7`T  
 //}}AFX_DATA_MAP f#t^<`7  
} a8 1%M  
rifxr4c[X>  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) `lhLIQ'j  
 //{{AFX_MSG_MAP(CAboutDlg) <j#EyGAV  
 // No message handlers -T8 gV1*(<  
 //}}AFX_MSG_MAP 1sJN^BvuG  
END_MESSAGE_MAP() $Da^z[8e  
@FV;5M:I  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) f0s &9H  
: CDialog(CCaptureDlg::IDD, pParent) EHHxCq?  
{ H^g<`XEgw  
 //{{AFX_DATA_INIT(CCaptureDlg) s*f.` A*)  
  m_bControl = FALSE; 12a #]E  
  m_bAlt = FALSE; (`u!/  
  m_bShift = FALSE; B`aAvD`7  
  m_Path = _T("c:\\"); w-$w  
  m_Number = _T("0 picture captured."); k ))*z FV  
  nCount=0; ;`B35K  
  bRegistered=FALSE; (ZK >WoV  
  bTray=FALSE; jh G7sS|  
 //}}AFX_DATA_INIT DE ws+y-*  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 )'~FDw\6  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); Anv8)J!9u  
} uH[0kh  
OpLSjr  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) l'T0<  
{ p#d UL9  
 CDialog::DoDataExchange(pDX); W wha?W>  
 //{{AFX_DATA_MAP(CCaptureDlg) -#6*T,f0P(  
  DDX_Control(pDX, IDC_KEY, m_Key); )mdNvb[*n  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); t] wM_]+  
  DDX_Check(pDX, IDC_ALT, m_bAlt); m-RY{DO+  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); Ji[g@#  
  DDX_Text(pDX, IDC_PATH, m_Path); (do=o&9p m  
  DDX_Text(pDX, IDC_NUMBER, m_Number); hhGpB$A  
 //}}AFX_DATA_MAP %b;+/s2W  
} j!\0Fyr  
u2]g1XjeG  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) 8 36m5/kH[  
//{{AFX_MSG_MAP(CCaptureDlg) _vH!0@QFU  
 ON_WM_SYSCOMMAND() .M2&ad :  
 ON_WM_PAINT() %Be[DLtE"  
 ON_WM_QUERYDRAGICON() MF}Lv1/[-J  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) ?8@*q6~8  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) C4tl4df9  
 ON_BN_CLICKED(ID_CHANGE, OnChange) E{ s|#  
//}}AFX_MSG_MAP l|A8AuO*?  
END_MESSAGE_MAP() Z!reX6  
v s|6w w  
BOOL CCaptureDlg::OnInitDialog() _KVB~loT  
{ |:+pPh!-  
 CDialog::OnInitDialog(); i(;-n_:, `  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); G3+a+=e  
 ASSERT(IDM_ABOUTBOX < 0xF000); D~OhwsL4  
 CMenu* pSysMenu = GetSystemMenu(FALSE); F |81i$R  
 if (pSysMenu != NULL) +c`C9RXk  
 { ~4MjJKzA  
  CString strAboutMenu; K)&XQ`&  
  strAboutMenu.LoadString(IDS_ABOUTBOX); 8$UZL  
  if (!strAboutMenu.IsEmpty()) vw] D{OBv*  
  { tQ JH'YV  
   pSysMenu->AppendMenu(MF_SEPARATOR); [V, ;X  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); t[,T}BCy.  
  } ddDJXk)!0  
 } Y&f[2+?2NK  
 SetIcon(m_hIcon, TRUE); // Set big icon $S8bp3)  
 SetIcon(m_hIcon, FALSE); // Set small icon OIty ]c  
 m_Key.SetCurSel(0); L"7` \4  
 RegisterHotkey(); a=.db&;vY  
 CMenu* pMenu=GetSystemMenu(FALSE); 8M+F!1-#  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); xKST-:c+  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); P=[x!}.I  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); 14 'x-w^~k  
 return TRUE; // return TRUE unless you set the focus to a control up3<=u{>  
} ysJhP .  
OCO,-(  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) ' 5 qL  
{ B4 Af  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) \w[ZY$/  
 { Z?c=t-yqp  
  CAboutDlg dlgAbout; X1[R*a/p  
  dlgAbout.DoModal(); JS?l?~  
 } [pgkY!R?)  
 else OXX(OCG>  
 { 7TPLVa=hO  
  CDialog::OnSysCommand(nID, lParam); a~>0JmM+N  
 } Bj($_2M%+  
} u|>U`[Zpj  
nQ!#G(_nO  
void CCaptureDlg::OnPaint() IOZ|85u =  
{ :$Q]U2$mPS  
 if (IsIconic()) OGi4m |  
 { :'rZZeb'  
  CPaintDC dc(this); // device context for painting bA^: p3  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); k=~pA iRDN  
  // Center icon in client rectangle \ Q8q9|g?]  
  int cxIcon = GetSystemMetrics(SM_CXICON); 1\J1yOL  
  int cyIcon = GetSystemMetrics(SM_CYICON); }:l%,DBw  
  CRect rect; 5YG@[ic  
  GetClientRect(&rect); K<  
  int x = (rect.Width() - cxIcon + 1) / 2; _B7?C:8Q-  
  int y = (rect.Height() - cyIcon + 1) / 2; YSz$` 7i  
  // Draw the icon ?CW^*So  
  dc.DrawIcon(x, y, m_hIcon); P}WhE  
 } X`v79`g_  
 else FlA\Ad;v  
 { b, **$  
  CDialog::OnPaint(); CE7pg&dJ)i  
 } e9hVX[uq  
} <_{4-Q>S3#  
fRa-bqQ  
HCURSOR CCaptureDlg::OnQueryDragIcon() RQ)!KlY  
{ IfmIX+t?  
 return (HCURSOR) m_hIcon; O{cGk: y  
} q{Ta?|x#  
:f !=_^}  
void CCaptureDlg::OnCancel() @uM3iO7&  
{ 3G/ mB  
 if(bTray) ^%8Hvy  
  DeleteIcon(); iMeRQYW  
  CDialog::OnCancel(); c;8"vJ  
} -f;j1bQ  
5nM9!A\D  
void CCaptureDlg::OnAbout() >-|90CSdSJ  
{ < J<;?%]  
 CAboutDlg dlg; `ToRkk&&>{  
 dlg.DoModal(); GgpQ]rw  
} ~)m t&   
G5nj,$F+  
void CCaptureDlg::OnBrowse() cM<hG:4%wX  
{ 0@e}hv;  
 CString str; {Fp`l\,  
 BROWSEINFO bi; s8yTK2v2\  
 char name[MAX_PATH]; PxVI {:Uz  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); CMxjX  
 bi.hwndOwner=GetSafeHwnd(); qfP"UAc{/  
 bi.pszDisplayName=name; seqF84Xd<  
 bi.lpszTitle="Select folder"; 7k#${,k  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; mA] 84zO  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); +?5Uy*$  
 if(idl==NULL) Fb{`a[&  
  return; Aiks>Cyi23  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); 400Tw`AiJ  
 str.ReleaseBuffer(); G0; EbJ/&  
 m_Path=str; I bv_D$cT  
 if(str.GetAt(str.GetLength()-1)!='\\') At[n<8_|  
  m_Path+="\\"; mp+\!  
 UpdateData(FALSE); ?Str*XA;  
} j#nO6\&o  
8T.5Mhx0jS  
void CCaptureDlg::SaveBmp() #SihedWi  
{ 1l|A[ G  
 CDC dc; ; LF)u2x=  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); F<oc Y0=9p  
 CBitmap bm; $kD`$L@U  
 int Width=GetSystemMetrics(SM_CXSCREEN); 4z0R\tjT  
 int Height=GetSystemMetrics(SM_CYSCREEN); N9JgV,`  
 bm.CreateCompatibleBitmap(&dc,Width,Height); Xx y Bg!R  
 CDC tdc; & L.PU@  
 tdc.CreateCompatibleDC(&dc); RqN_vk\  
 CBitmap*pOld=tdc.SelectObject(&bm); u5{5ts+:  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); kTi PZZI  
 tdc.SelectObject(pOld); ]dGr1 ncu  
 BITMAP btm; kO,VayjT  
 bm.GetBitmap(&btm); wUIsi<Oj  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; )(?UA$"  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); }KaCf,O  
 BITMAPINFOHEADER bih; +zVcOS*-  
 bih.biBitCount=btm.bmBitsPixel; 2NA rE@  
 bih.biClrImportant=0; :9x084ESR)  
 bih.biClrUsed=0; `3sy>GU?  
 bih.biCompression=0; @^:7UI_  
 bih.biHeight=btm.bmHeight; Z*)y.i`  
 bih.biPlanes=1; _sf#J|kQ  
 bih.biSize=sizeof(BITMAPINFOHEADER); k qY3r &  
 bih.biSizeImage=size; XEUa  
 bih.biWidth=btm.bmWidth; z"s%#/#  
 bih.biXPelsPerMeter=0; 7S dV%"  
 bih.biYPelsPerMeter=0; 9HJ'p:{)  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); GOZQ5m -  
 static int filecount=0; q(jkit~`A  
 CString name; ]4 K1%ZV  
 name.Format("pict%04d.bmp",filecount++); .n)!ZN  
 name=m_Path+name; az \<sWb#  
 BITMAPFILEHEADER bfh; :uIi ?  
 bfh.bfReserved1=bfh.bfReserved2=0; &Xn8oe  
 bfh.bfType=((WORD)('M'<< 8)|'B'); V'Z&>6Z  
 bfh.bfSize=54+size; }W__ffH  
 bfh.bfOffBits=54; J2oWssw"  
 CFile bf; dY4k9p8  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ iBtjd`V*  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); tkdBlG]!  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); k binf  
  bf.WriteHuge(lpData,size); :p\(y  
  bf.Close();  zU4V^N'  
  nCount++; Hn#GS9d_?  
 } "J8;4p  
 GlobalFreePtr(lpData); ;Txv -lfS  
 if(nCount==1) u6iU[5  
  m_Number.Format("%d picture captured.",nCount); 56bud3CVs  
 else EZ%w=  
  m_Number.Format("%d pictures captured.",nCount); ?2?S[\@`0U  
  UpdateData(FALSE); `\W   
} ,N@Yk.  
x!"SD3r=4>  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) Bg 7j5  
{ L= :d!UF  
 if(pMsg -> message == WM_KEYDOWN) S/nj5Lh  
 { ;LQ# *NjL\  
  if(pMsg -> wParam == VK_ESCAPE) l\T!)Ql  
   return TRUE; I+Ncmg )>  
  if(pMsg -> wParam == VK_RETURN) Xx3 g3P  
   return TRUE; w'oo-.k  
 } z_:eM7]jv  
 return CDialog::PreTranslateMessage(pMsg); J0ZxhxX35  
} XSm"I[.g  
wQD0 vsD  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) 9lZAa8Rxi  
{ nOAJ9  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ E(QZ!'%K+m  
  SaveBmp(); PJxak3  
  return FALSE; VxkCK02k  
} ZR;8r Z](  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ M#\  <  
 CMenu pop; E[|s>Xv~  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); &dhcKO<4  
 CMenu*pMenu=pop.GetSubMenu(0); %Y cxC0S[  
 pMenu->SetDefaultItem(ID_EXITICON); kf%&d}2to  
 CPoint pt; "*++55  
 GetCursorPos(&pt); 7SgweZ}"  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); b 0LGH. z4  
 if(id==ID_EXITICON) DU5:+" u3  
  DeleteIcon(); :]CzN^k(1c  
 else if(id==ID_EXIT) [%j?.N  
  OnCancel(); ?a'6EAErC  
 return FALSE; oUJj5iu}  
} F_A%8)N  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); h4hN1<ky\  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) gk!E$NyE  
 AddIcon(); Q^z=w![z  
 return res; mR{CVU  
} Y7<zm}=(/  
Vq3gceo'0A  
void CCaptureDlg::AddIcon() ==QWwPpA  
{ hp bwZ  
 NOTIFYICONDATA data; (C8 U   
 data.cbSize=sizeof(NOTIFYICONDATA); doP$N3Zm  
 CString tip; v! 7s M  
 tip.LoadString(IDS_ICONTIP); _GVE^yW~z  
 data.hIcon=GetIcon(0); U@Z>/ q  
 data.hWnd=GetSafeHwnd(); nNt*} k  
 strcpy(data.szTip,tip); f4]N0  
 data.uCallbackMessage=IDM_SHELL; "z rA``  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; ~bdv_|k  
 data.uID=98; #O2wyG)oU  
 Shell_NotifyIcon(NIM_ADD,&data); vU=9ydAj?  
 ShowWindow(SW_HIDE); "$XYIuT  
 bTray=TRUE; yXJ]U \ %  
} J|V K P7  
X}ZlWJ  
void CCaptureDlg::DeleteIcon() 96(R'^kNX  
{ T vrk^!  
 NOTIFYICONDATA data; (GCG/8s  
 data.cbSize=sizeof(NOTIFYICONDATA); Iz DG&c  
 data.hWnd=GetSafeHwnd(); ?Bo?JMV  
 data.uID=98; OF c\fW#  
 Shell_NotifyIcon(NIM_DELETE,&data); 0cHfxy3  
 ShowWindow(SW_SHOW); K&=D-50%  
 SetForegroundWindow(); 6iG(C.b  
 ShowWindow(SW_SHOWNORMAL); Zy^=fM  
 bTray=FALSE; DH 6q7"@  
}  n;wwMMBM  
yL0f1nS  
void CCaptureDlg::OnChange() f|OI`  
{ Vclr)}5  
 RegisterHotkey(); Z&_y0W=t  
} PK_s#uC  
otO j^xU  
BOOL CCaptureDlg::RegisterHotkey() qAoAUD m  
{ 'T\dkSJv;V  
 UpdateData(); )2xE z  
 UCHAR mask=0; {fZb@7?GF  
 UCHAR key=0; geksjVwPH  
 if(m_bControl) ^YGTh0$W  
  mask|=4; Yc^%zxub  
 if(m_bAlt) ?hnx/z+uT  
  mask|=2; !O|ql6^;  
 if(m_bShift) ebqg"tPN{  
  mask|=1; X0`j-*,FX  
  key=Key_Table[m_Key.GetCurSel()]; m6^ 5S  
 if(bRegistered){ lsk_P&M  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); >c<pDNt?  
  bRegistered=FALSE; +R!zs  
 } ~g6"'Cya?k  
 cMask=mask; e}c&LDgU  
 cKey=key; `ncNEHh7K  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); \)OEBN`9#  
 return bRegistered; @Mm/C?#*O  
} jpRBER_X  
*i^`Dw^~y  
  四、小结 h4_ b!E@  
[)^mBVht  
  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
批量上传需要先选择文件,再选择上传
认证码:
验证问题:
10+5=?,请输入中文答案:十五