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
  • 5432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: ifWQwS/,a  
  TrgKl2xfx  
  一、实现方法 m1K4_a)^[  
Z6So5r%wZ  
  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: E>|fbaN-%  
giIPK&  
#pragma data_seg("shareddata") L;Ynq<x  
HHOOK hHook =NULL; //钩子句柄 @}r s6 G  
UINT nHookCount =0; //挂接的程序数目 Nw ,|4S  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 <}xgp[O  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 qs8^qn0A  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey KAVkYL0  
static int KeyCount =0; U0W2  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 S6JWsi4C:,  
#pragma data_seg() ^VnnYtCRz  
71IM`eL=ED  
  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。 ^IvQdVB  
0<<ATw$aQ  
  DLL中的两个输出函数分别用来添加/删除热键,函数代码如下: 9 %Vy,  
_9=cxwi<w  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR !u:;Ew  
cKey,UCHAR cMask) all2?neK  
{ ([SJ6ff]&  
 BOOL bAdded=FALSE; vwAhNw2-  
 for(int index=0;index<MAX_KEY;index++){ 2/F8kVx{  
  if(hCallWnd[index]==0){  '"hSX=  
   hCallWnd[index]=hWnd; ;i [;%  
   HotKey[index]=cKey; IW}Wt{'m  
   HotKeyMask[index]=cMask; @eESKg(,  
   bAdded=TRUE; 6\UIp#X  
   KeyCount++; t8lGC R  
   break; Q 4L7{^[X  
  } "fN 6_*  
 } PgP\v-.  
 return bAdded; 1=X1<@*  
} _K!)0p  
//删除热键 1'\s7P  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) -) +B!"1  
{ t,A=B(W  
 BOOL bRemoved=FALSE; g^#,!e  
 for(int index=0;index<MAX_KEY;index++){ g&_f%hx?  
  if(hCallWnd[index]==hWnd){ xMpgXB!'  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ k5}Qx'/l  
    hCallWnd[index]=NULL; pFBK'NE  
    HotKey[index]=0; szqR1A  
    HotKeyMask[index]=0; mtLiS3Nk8  
    bRemoved=TRUE; (6 RWI#  
    KeyCount--; XKOPW/  
    break; 3_&s'sG5  
   } &tiJ=;R1  
  } &- My[t  
 } 2PNe~9)*#  
 return bRemoved; {g4w[F!77  
} ZBQ@S  
1bDXv, nD  
#*S.26P^4  
  DLL中的钩子函数如下: (BK_A {5  
?5% o-hB|  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) n-GoG(s..b  
{ lG[j,MDs  
 BOOL bProcessed=FALSE; qJ~fEX  
 if(HC_ACTION==nCode) Da)_OJYE  
 { puh-\Q/P  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 :S-{a  
   switch(wParam) wq8&2(|Fc  
   {  4)XB3$<  
    case VK_MENU: d<m.5ECC}  
     MaskBits&=~ALTBIT; #oR@!?  
     break; fgA-+y  
    case VK_CONTROL: YPKB4p#  
     MaskBits&=~CTRLBIT; <1QXZfQ"  
     break; >oi?aD%  
    case VK_SHIFT:  Oe "%v;-  
     MaskBits&=~SHIFTBIT; 4`o<e)c3  
     break; nYBa+>3BDf  
    default: //judge the key and send message ^nFP#J)_5  
     break; ?1LRR ;-x  
   } ^q|W@uG-(  
   for(int index=0;index<MAX_KEY;index++){ HHs!6`R$0c  
    if(hCallWnd[index]==NULL) e;|$nw-  
     continue; XBcbLF  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) #\K"FE0PGz  
    { <LJb,l"  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); mwZ) PySm)  
     bProcessed=TRUE; lPtML<a  
    } Jm0.\[J  
   } &xt GabNk  
  } )4 ,U  
  else if((lParam&0xc000ffff)==1){ //有键按下 <q I!Dj{  
   switch(wParam) b9v<Jk  
   { x2OAkkH\]i  
    case VK_MENU: 0fqycGSmU  
     MaskBits|=ALTBIT; 'C>sYSL  
     break; e3[Q6d&|  
    case VK_CONTROL: {/,AMJ<:G]  
     MaskBits|=CTRLBIT; _~F 0i?  
     break; O{U j  
    case VK_SHIFT: `'pAiu  
     MaskBits|=SHIFTBIT; @a 7U0$,O#  
     break; Y|tK19  
    default: //judge the key and send message #]gmM  
     break; {&6i$4T  
   } eYu0")  
   for(int index=0;index<MAX_KEY;index++){ :s-9@Yl|  
    if(hCallWnd[index]==NULL) M[Nv>  
     continue; 4_$.gO  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) Fw}|c  
    { <zAYq=IU  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); ip1gCH/?_+  
     bProcessed=TRUE; }O| 9Qb  
    } )me`Ud  
   } 2Je]dj4  
  } -_O j iQ R  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 3od16{YH  
   for(int index=0;index<MAX_KEY;index++){ NBLjBa%eL  
    if(hCallWnd[index]==NULL) -YrMVoZl  
     continue; !E)|[:$XT  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) [ Q/kNK  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); XBO( *6"E  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 t-<BRnxhE  
   } {lg iH+:  
  } ,]Xn9 W  
 } 2. {/ls  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); TgHUH>k  
} ]M'~uTf  
'P[#.9E  
  抓图程序是一个基于对话框的程序,它在建立对话框的时候调用前面的DLL,登记热键,因此需要将hook.lib添加到工程里,在程序里给出两个DLL函数的定义,也可以写个头文件,再包含进来以下代码: j"VDqDDz  
"{Y6.)x  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); 8N3y(y0  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); rI6+St  
O}}rosA  
  为了添加应用程序对热键通知事件的响应,程序中用的办法是重载WindowProc()函数,该函数代码如下: qL[ SwEc  
Mq'm TM  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) ,*?[Rg0]+  
{ ooC9a>X  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) >vO+k^'Y  
 { JZ&_1~Z=  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 aeAx0yE[p  
  SaveBmp(); cL~YQJYp  
  return FALSE; <$WS~tTz  
 } dep"$pys>  
 …… //其它处理及默认处理 j0(jXAc;UB  
} J(w FJg\/  
m - hZ5 i  
k]`-Y E  
  将屏幕图像保存到BMP文件中的任务是由函数SaveBmp()来完成的,具体实现参见代码部分。另外为了顺利实现屏幕抓图,程序中还实现了"托盘"功能,由于这一部分本书在实例中已经专门介绍过了,所以不再赘述,读者朋友可以参考相关实例。 M.:JT31>1  
=);@<Jp  
  最后需要提醒读者朋友们注意的是,源程序的编译与使用时要先编译hook.dll并将其放在系统目录(win2000/NT是system32,98/ME是system),然后编译对话框程序运行即可。 j['B9vG  
Z_ Y'#5o#  
  二、编程步骤 l\uNh~\  
x($Djx  
  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"; uU^iY$w  
Xil;`8h  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; Wcm8,?*  
;Zr7NKs  
  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; ;Me*# /  
;K%/s IIke  
  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; Z&P\}mm   
TU*EtE'g/  
  5、 添加代码,编译运行程序。 t V>qV\>  
z0#2?o  
三、程序代码 6<R[hIWpZ}  
\j3dB tc  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL 4z9lk^#"X  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) rPqM&&+  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ bSz7?NAp  
#if _MSC_VER > 1000 9 %i\)  
#pragma once ~131|e`C  
#endif // _MSC_VER > 1000 Kr `/sWZ  
#ifndef __AFXWIN_H__ ecR)8^1 '  
#error include 'stdafx.h' before including this file for PCH ]^>:)q  
#endif 6 .)Xeb"  
#include "resource.h" // main symbols 3eXIo=  
class CHookApp : public CWinApp vLyazVj..  
{ H\\FAOj  
 public: 5Z5x\CcC3  
  CHookApp(); |r36iUHZS  
  // Overrides Id>4fF:o  
  // ClassWizard generated virtual function overrides >xq. bG  
  //{{AFX_VIRTUAL(CHookApp) m8e()8lZ3  
 public: Kfr1k  
  virtual BOOL InitInstance(); P".IW.^kk~  
  virtual int ExitInstance(); 4v3gpLH  
  //}}AFX_VIRTUAL x;\/Xj ;  
  //{{AFX_MSG(CHookApp) F"O\uo:3  
  // NOTE - the ClassWizard will add and remove member functions here. eF9GhwE=  
  // DO NOT EDIT what you see in these blocks of generated code ! b78~{h t`  
  //}}AFX_MSG IF\ @uo`  
  DECLARE_MESSAGE_MAP() xIC@$GP  
}; h:r?:C>n  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); /]MelW  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); %Ta"H3ZW  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); 0K26\1  
BOOL InitHotkey(); H:~u(N  
BOOL UnInit(); rDa{Ve  
#endif  0yq  
vv{+p(~**O  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. Jww#zEK  
#include "stdafx.h" X;Sb^c"j1  
#include "hook.h" x&0kIF'lq  
#include <windowsx.h> lG%697P  
#ifdef _DEBUG +A)> zx  
#define new DEBUG_NEW V[KN,o{6  
#undef THIS_FILE \=bKuP(it  
static char THIS_FILE[] = __FILE__; lw.[qP  
#endif 19#>\9*  
#define MAX_KEY 100 >eQ.y- 4  
#define CTRLBIT 0x04 0<NS1y  
#define ALTBIT 0x02 4OpzGZ4+  
#define SHIFTBIT 0x01 *X2PT(e[  
#pragma data_seg("shareddata") MGt>:&s(]  
HHOOK hHook =NULL; # #2'QNN  
UINT nHookCount =0; $T^q>v2u  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey &ah%^Z4um  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT oW 6Hufu+o  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey w K#*|  
static int KeyCount =0; yb ?Pyq.D  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift ?4Rd4sIM$u  
#pragma data_seg() V|$PO Qa3  
HINSTANCE hins; qqf*g=f  
void VerifyWindow(); wCruj`$  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) Zis,%XY  
//{{AFX_MSG_MAP(CHookApp) %xOxMK@  
// NOTE - the ClassWizard will add and remove mapping macros here. |%v:>XEO  
// DO NOT EDIT what you see in these blocks of generated code! Z?!AJY  
//}}AFX_MSG_MAP 3IlVSR^py  
END_MESSAGE_MAP() ,aC}0t  
(I#6!Yt9J  
CHookApp::CHookApp() k_7b0 dr%F  
{ tm^joK[{|J  
 // TODO: add construction code here, x5BS|3W$a  
 // Place all significant initialization in InitInstance 4Z~ nWs  
} f!w/zC .  
jTIG#J)  
CHookApp theApp; k'#3fz\  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) iC=>wrqY>  
{ X~0 -WBz  
 BOOL bProcessed=FALSE; _#:7S sJ  
 if(HC_ACTION==nCode) OB$Jv<C@  
 { p TwzVz~  
  if((lParam&0xc0000000)==0xc0000000){// Key up Pd"c*n&9  
   switch(wParam) a'?;;ZC-  
   { a(]&H "  
    case VK_MENU: pka^7OWyN  
     MaskBits&=~ALTBIT; ~1wt=Ln>  
     break; tjb$MW$('  
    case VK_CONTROL: TZt;-t`  
     MaskBits&=~CTRLBIT; A%Ka)UU+n  
     break; Pg(Y}Tu  
    case VK_SHIFT: oMj"l#a*  
     MaskBits&=~SHIFTBIT; $) "\N  
     break; RBn/7  
    default: //judge the key and send message h]ae^M  
     break; L,y q=%h|  
   } 8xgBNQdPT  
   for(int index=0;index<MAX_KEY;index++){ jc Mn   
    if(hCallWnd[index]==NULL) o?>0WSLlm  
     continue; ]$r]GVeN}H  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) yVmp,""a  
    { aO&{.DO2  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); !~~KM?g  
     bProcessed=TRUE; RdWn =;  
    } KYm8|]'g  
   } s0f+AS|}  
  } )__sw  
  else if((lParam&0xc000ffff)==1){ //Key down l! 88|~  
   switch(wParam) u0&R*YV  
   { 9d#?,:JG  
    case VK_MENU: Xpg -rxX  
     MaskBits|=ALTBIT; .eD&UQ  
     break; jsE8=zZs  
    case VK_CONTROL: zP #:Tv'  
     MaskBits|=CTRLBIT; S u6kpC!EW  
     break; {]]%0!n\  
    case VK_SHIFT: GEc-<`-  
     MaskBits|=SHIFTBIT; fGlvum  
     break; V=8db% ^  
    default: //judge the key and send message w)+1^eW  
     break; xB Wl|j  
   } e72Fz#<q  
   for(int index=0;index<MAX_KEY;index++) [#uhMn^  
   { )H W   
    if(hCallWnd[index]==NULL) m 1; Htw  
     continue; 8fP2qj0  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) ^7aqe*|vm  
    { *P=3Pl?j  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); n!/0yR2S  
     bProcessed=TRUE; Ba m.B6-  
    } pJ/]\>#5  
   } @e3+Gs  
  } {L7Pha  
  if(!bProcessed){ q< q IT  
   for(int index=0;index<MAX_KEY;index++){ KMIe%2:b5  
    if(hCallWnd[index]==NULL) >=;-:  
     continue; Dnw^H.  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) {. 9BG&  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); %eDSo9Y  
   } by @qg:  
  } VtLRl0/  
 } @rbd`7$%  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); k37?NoT  
} p]RQ-0  
^t4^gcoZ4Z  
BOOL InitHotkey() ';FJs&=I  
{ wz`% ( \  
 if(hHook!=NULL){ @`L ;_S+  
  nHookCount++; V*\hGNV  
  return TRUE; q"2APvsvp  
 } 1cOR?=G~  
 else jSE)&K4nI  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); $lT8M-yK\  
  if(hHook!=NULL) gdf0  
   nHookCount++; gxVr1DIkN  
  return (hHook!=NULL); (1D1;J4g  
} A)]&L`s  
BOOL UnInit() MygAmV&  
{ 9 fB|e|  
 if(nHookCount>1){ D2&d",%&f  
  nHookCount--; JyE-c}I  
  return TRUE; CjpGo}a/  
 } Wf3BmkZzz  
 BOOL unhooked = UnhookWindowsHookEx(hHook); GbQi3%  
 if(unhooked==TRUE){ !lNyoX/  
  nHookCount=0; ; oa+Z:;f  
  hHook=NULL; h^=;\ng1l  
 } Ak@!F6~  
 return unhooked; <7 U~0@<Y  
} Bu=1-8@=qs  
+S4>}2N33  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) tI{]&dev  
{ Uyb0iQ-,s  
 BOOL bAdded=FALSE; rq3f/_#L!O  
 for(int index=0;index<MAX_KEY;index++){ O^~IY/[  
  if(hCallWnd[index]==0){ L3Y,z3/  
   hCallWnd[index]=hWnd; 7o+L  
   HotKey[index]=cKey; 3XQa%|N(  
   HotKeyMask[index]=cMask; b V  EJ  
   bAdded=TRUE; %RV81H9B  
   KeyCount++; 2QaE&8vW  
   break; ~_EDJp1J  
  } y`n?f|nf  
 } o:QL%J{[  
 return bAdded; vz4( k/  
} ,K,st+s|  
s>6h]H  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) HN5661;8  
{ ;"Gy5  
 BOOL bRemoved=FALSE; O ixqou  
 for(int index=0;index<MAX_KEY;index++){ {4 Yx h8  
  if(hCallWnd[index]==hWnd){ p($vM^_<"  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ %9>w|%+;U+  
    hCallWnd[index]=NULL; $t%IJT  
    HotKey[index]=0; M5WB.L[@ q  
    HotKeyMask[index]=0; 2@tnOs(*  
    bRemoved=TRUE; 9k;,WU(K<  
    KeyCount--; aU(.LC  
    break; oC|oh  
   } g J |#xZ  
  } %.=}v7&<z  
 } !lfE7|\p  
 return bRemoved; Vpg>K #w  
} t~ {O)tt  
i,;JI>U  
void VerifyWindow() qa^cJ1@  
{ Kc\8GkdB  
 for(int i=0;i<MAX_KEY;i++){ nIg 88*6b,  
  if(hCallWnd!=NULL){ LnE/62){N  
   if(!IsWindow(hCallWnd)){ ,7@\e &/&  
    hCallWnd=NULL; X,w X)9]J  
    HotKey=0; [>v1JN  
    HotKeyMask=0; P0}B&B/a:  
    KeyCount--; Fqw4XR_`~  
   } e7GYz7  
  } ?:$ q~[LY  
 } 4x)vy -y  
} PI*@.kqR-  
MuD ? KK  
BOOL CHookApp::InitInstance() phH@{mI  
{ HU>>\t?d  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); m)L50ot:/  
 hins=AfxGetInstanceHandle(); ."ZG0Zg  
 InitHotkey(); cS%dTrfo  
 return CWinApp::InitInstance(); < ?B3^z$  
} /HRKw D  
eaf-_#qb  
int CHookApp::ExitInstance() m:)&:Y0 (a  
{ :^kAFLU  
 VerifyWindow(); o_Zs0/  
 UnInit(); [E p'm  
 return CWinApp::ExitInstance(); K^<?LXJF  
} !nl-}P,  
%@C8EFl%3  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file @LOfqQ$FE  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) /lECgu*#69  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ &fB=&jc*j  
#if _MSC_VER > 1000 GPLop/6   
#pragma once } iKjef#J  
#endif // _MSC_VER > 1000 ~B{08%|oK  
7<WUj K|  
class CCaptureDlg : public CDialog A2gFY}  
{ ;l!<A  
 // Construction 3H!]X M  
 public: i_N8)Z;r  
  BOOL bTray; HFP'b=?`]|  
  BOOL bRegistered; AI3x,rk#  
  BOOL RegisterHotkey(); ;wMu  
  UCHAR cKey; eQuw uT  
  UCHAR cMask; %mss{p!d6  
  void DeleteIcon(); `l]Lvk8O  
  void AddIcon(); `_cv& "K9f  
  UINT nCount; yQ/O[(  
  void SaveBmp(); dUa>XkPa\2  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor /g>-s&w  
  // Dialog Data y%vAEQ2j=  
  //{{AFX_DATA(CCaptureDlg) `0ym3}(O  
  enum { IDD = IDD_CAPTURE_DIALOG }; !T<,fR+8X  
  CComboBox m_Key; @@*x/"GJG  
  BOOL m_bControl; E\D,=|Mul  
  BOOL m_bAlt; Zo2+{a  
  BOOL m_bShift; H4`>B>\  
  CString m_Path; \Ebh6SRp\  
  CString m_Number; b|AjB:G  
  //}}AFX_DATA wzy[sB274  
  // ClassWizard generated virtual function overrides J#C4A]A  
  //{{AFX_VIRTUAL(CCaptureDlg) +#wVe  
 public: ?n{m2.H  
  virtual BOOL PreTranslateMessage(MSG* pMsg); "=DQ {(L  
 protected: WwsNAJ  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support 1f+A_k/@  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); ,X3D< wl  
  //}}AFX_VIRTUAL 3A ^AEO  
  // Implementation kkZ}&OXS;  
 protected: L@O>;zp;  
  HICON m_hIcon; 5nib<B%<V  
  // Generated message map functions ;!f~  
  //{{AFX_MSG(CCaptureDlg) `r1j>F7Xb  
  virtual BOOL OnInitDialog(); VB905%  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); F#|y,<}<  
  afx_msg void OnPaint(); kO}%Y?9d  
  afx_msg HCURSOR OnQueryDragIcon(); 1y:fH4V  
  virtual void OnCancel(); Fq~Zr;A  
  afx_msg void OnAbout(); pBe1:  
  afx_msg void OnBrowse(); dCM &Yf}K  
  afx_msg void OnChange(); ]R\L~Kr  
 //}}AFX_MSG 95IP_1}?  
 DECLARE_MESSAGE_MAP() k(RKAFjY  
}; K@e2%hk9x  
#endif HYO/]\al  
.X3n9]  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file [nHN@ p|  
#include "stdafx.h" v\bWQs1  
#include "Capture.h" axmq/8X  
#include "CaptureDlg.h" 7Ku&Q<mi  
#include <windowsx.h> 1v:Ql\^cT  
#pragma comment(lib,"hook.lib") 4I&(>9 @z<  
#ifdef _DEBUG YSxr(\~j   
#define new DEBUG_NEW 8 !:2:  
#undef THIS_FILE c[2ikI,n[  
static char THIS_FILE[] = __FILE__; G HQ~{  
#endif QaLaw-lx  
#define IDM_SHELL WM_USER+1 >x%HqP#_V  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); (7<G1$:z=  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); b0'}BMJ  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; q 1xSylE  
class CAboutDlg : public CDialog ;iYCeL(  
{ .BxQF  
 public: 3}V (8  
  CAboutDlg(); <;#gcF[7>  
  // Dialog Data Qa/1*Mb  
  //{{AFX_DATA(CAboutDlg) Da)p%E>Q  
  enum { IDD = IDD_ABOUTBOX }; #@-dT,t  
  //}}AFX_DATA $W}:,]hoj  
  // ClassWizard generated virtual function overrides JcYY*p  
  //{{AFX_VIRTUAL(CAboutDlg) :4[>]&:u3  
 protected: {.oz^~zs]g  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support u= dj3q  
  //}}AFX_VIRTUAL &bJBsd@Os  
  // Implementation 5q@s6_"{  
 protected: eb}XooX  
  //{{AFX_MSG(CAboutDlg) q'7.lrKwa>  
  //}}AFX_MSG fcp_<2KH  
  DECLARE_MESSAGE_MAP() .n_Z0&i/w  
}; .s"Og;g  
v$@1q9 5J  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) Cm8h b  
{ -ewR:Y@j  
 //{{AFX_DATA_INIT(CAboutDlg) ]6^S: K_"  
 //}}AFX_DATA_INIT CB9:53zK9  
} #\N8E-d  
/zh:7N  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) Ie!">8."  
{ }BW&1*M{  
 CDialog::DoDataExchange(pDX); Chl^LEN:  
 //{{AFX_DATA_MAP(CAboutDlg) dY. X/f  
 //}}AFX_DATA_MAP eN5F@isy  
} VWt=9D;  
bbS,pid1  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) NApy(e 5%  
 //{{AFX_MSG_MAP(CAboutDlg) IHCxM|/k(M  
 // No message handlers 2sgp$r  
 //}}AFX_MSG_MAP }9U_4k  
END_MESSAGE_MAP() @$kzes\  
a5m[ N'kah  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) ~Fo2MwE2~  
: CDialog(CCaptureDlg::IDD, pParent) id+EBVHAd  
{ :I /9j=@1  
 //{{AFX_DATA_INIT(CCaptureDlg) HZ!<dy3  
  m_bControl = FALSE; z|],s]F>G  
  m_bAlt = FALSE; -]}#Z:&  
  m_bShift = FALSE; R f)|p;  
  m_Path = _T("c:\\"); XySkm2y  
  m_Number = _T("0 picture captured."); f'"PQr^9  
  nCount=0; /T  {R\  
  bRegistered=FALSE; ;2`t0#J$]  
  bTray=FALSE; W\0u[IV.x  
 //}}AFX_DATA_INIT ' xaPahx;  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 I AUc.VH  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); wAu]U6!  
} }+S~Ah?(  
*!%n`BR '  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) T1RY1hb|g>  
{ 9MJ:]F5+  
 CDialog::DoDataExchange(pDX); .K-d  
 //{{AFX_DATA_MAP(CCaptureDlg) 7Q'u>o  
  DDX_Control(pDX, IDC_KEY, m_Key); 1NZpd'$c  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); L~h:>I+pG  
  DDX_Check(pDX, IDC_ALT, m_bAlt); 7s%1?$B  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); vMX\q  
  DDX_Text(pDX, IDC_PATH, m_Path); ~ m vv :u  
  DDX_Text(pDX, IDC_NUMBER, m_Number); 3rZPVR$))  
 //}}AFX_DATA_MAP [vuikJP>1k  
} im+g |9@%  
H_S"4ISS_  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) 8z|]{XW{  
//{{AFX_MSG_MAP(CCaptureDlg) OcpvY~"Pr  
 ON_WM_SYSCOMMAND() -/B*\X[  
 ON_WM_PAINT() &)Zv>P8z`  
 ON_WM_QUERYDRAGICON() m@I}$  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) je#LD  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) d j9i*#F  
 ON_BN_CLICKED(ID_CHANGE, OnChange) ukW L3  
//}}AFX_MSG_MAP n]3'N58  
END_MESSAGE_MAP() Q$: ,N=%  
.#sX|c=W  
BOOL CCaptureDlg::OnInitDialog() GHLFn~z@XJ  
{ sAA;d  
 CDialog::OnInitDialog(); $z)egh(z  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); !jEV75  
 ASSERT(IDM_ABOUTBOX < 0xF000); t]vv&vk>  
 CMenu* pSysMenu = GetSystemMenu(FALSE); iM9k!u FE  
 if (pSysMenu != NULL) xrY >Or  
 { c>c4IQ&d  
  CString strAboutMenu; txMC^-J2l  
  strAboutMenu.LoadString(IDS_ABOUTBOX); yXtQfR  
  if (!strAboutMenu.IsEmpty()) E*tT^x)  
  { 2|1CGHj\  
   pSysMenu->AppendMenu(MF_SEPARATOR); `B8`<3k/(  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); D8B\F5..c#  
  } ]RadwH"0!  
 } .*595SuF  
 SetIcon(m_hIcon, TRUE); // Set big icon \%}]wf}  
 SetIcon(m_hIcon, FALSE); // Set small icon 1W0[|Hf2v*  
 m_Key.SetCurSel(0); )B-[Q#*A-  
 RegisterHotkey(); #@V<{/;49  
 CMenu* pMenu=GetSystemMenu(FALSE); .2rpQa/h  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); ;sUvY*Bcm  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); cw0 @Z0  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); tqB6:p-%  
 return TRUE; // return TRUE unless you set the focus to a control /IX555/dR1  
} D'D IC  
*>EV4Hl  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam)  L`Ys`7  
{  Hi\z-P-  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) Z6WNMQ1:  
 { #U3q +d+^  
  CAboutDlg dlgAbout;  RZqMpW  
  dlgAbout.DoModal(); (B@\Dw8^  
 } )VG>6x  
 else -!T24/l  
 { nnu#rtvZp}  
  CDialog::OnSysCommand(nID, lParam); 6&LmR75C  
 } XdlA)0S)  
} +#UawYLJ  
>#T?]5Z'MF  
void CCaptureDlg::OnPaint() (bNoe(<qU  
{ \Q|,0`  
 if (IsIconic())  9,tk  
 { ,N_V(Cx5pt  
  CPaintDC dc(this); // device context for painting 5[*8C Y  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); nD 4C $  
  // Center icon in client rectangle |{%$x^KyJ  
  int cxIcon = GetSystemMetrics(SM_CXICON); ?%Q=l;W.  
  int cyIcon = GetSystemMetrics(SM_CYICON); s nNd7v.U6  
  CRect rect; l8%BRG  
  GetClientRect(&rect);  0,#n_"  
  int x = (rect.Width() - cxIcon + 1) / 2; a>Aq/=  
  int y = (rect.Height() - cyIcon + 1) / 2; weGsjy(b]N  
  // Draw the icon ;3Z?MQe"NQ  
  dc.DrawIcon(x, y, m_hIcon); ^x( s !4d]  
 } %\'G2  
 else M3d%$q)<rW  
 { 0E3;f;'X  
  CDialog::OnPaint(); '['x'G50  
 } 931GJA~g  
} @,G\` ;Ma  
LH@Kn?R6  
HCURSOR CCaptureDlg::OnQueryDragIcon() 2>CR]  
{ AS4oz:B  
 return (HCURSOR) m_hIcon; )T slI  
} v`qXb$YW  
9*!*n ~  
void CCaptureDlg::OnCancel()  ,HNk<W  
{ "r@G V5ED  
 if(bTray) $RC)e 7  
  DeleteIcon(); elD|b=(-  
  CDialog::OnCancel(); c4Q%MRR  
} X VH( zJ  
FId,/la  
void CCaptureDlg::OnAbout() NJ$Qm.S  
{ f& Sovuuh  
 CAboutDlg dlg; Kb/qM}jS  
 dlg.DoModal(); BuitM|k'  
} y<BG-  
Xoq -  
void CCaptureDlg::OnBrowse() $p }q,f.  
{ E;k$ICOXA  
 CString str; :;]O;RXt  
 BROWSEINFO bi; r'*#i>PkQD  
 char name[MAX_PATH]; m.5@q mQ  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); eG dFupfz  
 bi.hwndOwner=GetSafeHwnd(); ).tTDZ   
 bi.pszDisplayName=name; h>z5m   
 bi.lpszTitle="Select folder"; tC/+  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; ) 2jH&}K  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); wr>6Go%  
 if(idl==NULL) 'OU3-K  
  return; :$XlYJrjK  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); Io /;+R .  
 str.ReleaseBuffer(); #,"[sag  
 m_Path=str; u0ZMrIJ  
 if(str.GetAt(str.GetLength()-1)!='\\') U4iVI#f  
  m_Path+="\\"; *m'&<pg]X  
 UpdateData(FALSE); ?|Wxqo  
} h54\ \Ci  
9'vf2) "  
void CCaptureDlg::SaveBmp() vNm4xa%  
{ }h sR}  
 CDC dc; =[TXH^.0  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); + =U9<8  
 CBitmap bm; ,o3`O|PiK  
 int Width=GetSystemMetrics(SM_CXSCREEN); aCfWbJ@qiG  
 int Height=GetSystemMetrics(SM_CYSCREEN); M~9IL\J^G  
 bm.CreateCompatibleBitmap(&dc,Width,Height); SEM- t   
 CDC tdc; Pn ?gB}l  
 tdc.CreateCompatibleDC(&dc); }JUc!cH8z  
 CBitmap*pOld=tdc.SelectObject(&bm); ,OkI0[  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); GN+,9  
 tdc.SelectObject(pOld); n (Um/  
 BITMAP btm; sr<\fW  
 bm.GetBitmap(&btm); PFbkkQKsT  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; ++|e z{  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); btDTC 9O  
 BITMAPINFOHEADER bih; Izfq`zS+\s  
 bih.biBitCount=btm.bmBitsPixel; O? 7hT!{  
 bih.biClrImportant=0; qE6D"+1y7  
 bih.biClrUsed=0; Z|3[Y@c \  
 bih.biCompression=0; {{ 1qk G9$  
 bih.biHeight=btm.bmHeight; oRmA\R*  
 bih.biPlanes=1; GIS,EwA  
 bih.biSize=sizeof(BITMAPINFOHEADER); _( QW2m?K  
 bih.biSizeImage=size; :vFYqoCn  
 bih.biWidth=btm.bmWidth; 1CUI6@Cz)  
 bih.biXPelsPerMeter=0; AG G xx?I  
 bih.biYPelsPerMeter=0; W7\UZPs5t  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); *4Z! 5iOs  
 static int filecount=0; )<5hga][~a  
 CString name; 9G[t &r  
 name.Format("pict%04d.bmp",filecount++); ;_/!F}d  
 name=m_Path+name; WjvgDNk  
 BITMAPFILEHEADER bfh; 6x16?x  
 bfh.bfReserved1=bfh.bfReserved2=0; P qa;fiJ)  
 bfh.bfType=((WORD)('M'<< 8)|'B'); Rf{YASPIw&  
 bfh.bfSize=54+size; q9Lq+4\  
 bfh.bfOffBits=54; V#~.n ;d  
 CFile bf; &i *e&{L7  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ B\~(:(OPM]  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER));  Q 6r  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); 2FN#63  
  bf.WriteHuge(lpData,size); :;&3"-  
  bf.Close(); 7lzmAih  
  nCount++; @Fb 2c0?Y  
 } zRm@ |IT  
 GlobalFreePtr(lpData); }%3i8e  
 if(nCount==1) Ed#Hilk'  
  m_Number.Format("%d picture captured.",nCount); VF~kjH2>  
 else N1l^%Yf J  
  m_Number.Format("%d pictures captured.",nCount); }~v0o# I  
  UpdateData(FALSE); NU 3s^ 8\(  
} f!B\X*|  
[QwqP=-6  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) V$ " ]f6  
{ UrdSo"%  
 if(pMsg -> message == WM_KEYDOWN) J c:j7}OOV  
 { jZ<f-Ff0  
  if(pMsg -> wParam == VK_ESCAPE) bZgFea_>i  
   return TRUE; P#,g5  
  if(pMsg -> wParam == VK_RETURN) 80LN(0?x  
   return TRUE; 2KNs,4X@  
 } Et;Ubj"+  
 return CDialog::PreTranslateMessage(pMsg); aBKJd  
} [-nPHmZV[  
G;J!3A;TE  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) h- %RSei5  
{ @CA{uP;  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ /Em6+DN>  
  SaveBmp(); 6D4 j];~X  
  return FALSE; 6PMu*-Nv!j  
} 1 @q"rPE^  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ jq(rnbV  
 CMenu pop; 2bOFH6g  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); Ro#O{  
 CMenu*pMenu=pop.GetSubMenu(0); xHlO~:Lc  
 pMenu->SetDefaultItem(ID_EXITICON); $A)[s$  
 CPoint pt; t<SCrLbz  
 GetCursorPos(&pt); ,d8*7my  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); *zv*T"&ZP  
 if(id==ID_EXITICON) 6KX/Yj~B  
  DeleteIcon(); 2))p B/  
 else if(id==ID_EXIT) 1HeE$  
  OnCancel(); 6I\4Yv$N  
 return FALSE; zoau5t  
} !Ic~_7"  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); p$$0**p!`  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) t'HrI-x  
 AddIcon(); ,'@t .XP  
 return res; Nkk+*(Z  
} %p^`,b}  
.:Zb~  
void CCaptureDlg::AddIcon() (l)r.Vj  
{ KtaoU2s  
 NOTIFYICONDATA data; F7`[r9 $  
 data.cbSize=sizeof(NOTIFYICONDATA); T{*!.+E  
 CString tip; W"5VqN6v  
 tip.LoadString(IDS_ICONTIP); S8;5|ya  
 data.hIcon=GetIcon(0); s 5F?m  
 data.hWnd=GetSafeHwnd(); ^7Z.~A y  
 strcpy(data.szTip,tip); Y-]Ne"+vf  
 data.uCallbackMessage=IDM_SHELL; xepp."O  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ;  SB^xq  
 data.uID=98; +QEiY~i  
 Shell_NotifyIcon(NIM_ADD,&data); F>aaUj  
 ShowWindow(SW_HIDE); }J_#N.y  
 bTray=TRUE; #$u7:p [t  
} ^dKtUH/78G  
[9~6, ;6  
void CCaptureDlg::DeleteIcon() =gO4B-[  
{ AL[,&_&uV  
 NOTIFYICONDATA data; -\8v{ry  
 data.cbSize=sizeof(NOTIFYICONDATA); !InC8+be  
 data.hWnd=GetSafeHwnd(); 77%I%<#  
 data.uID=98; %"AB\lL.  
 Shell_NotifyIcon(NIM_DELETE,&data); :Gf  
 ShowWindow(SW_SHOW); Uq(fk9`6  
 SetForegroundWindow(); TL: 6Pe  
 ShowWindow(SW_SHOWNORMAL); R(GL{Dh}L  
 bTray=FALSE; +3r4GEa Z  
} \C"hL(4-  
BB? 4>#D  
void CCaptureDlg::OnChange() Pq3|O Z  
{ evz@c)8  
 RegisterHotkey(); *NoixV1>  
} w*gG1BV  
XK/bE35%^!  
BOOL CCaptureDlg::RegisterHotkey() b4>1UZGW-  
{ Url8&.pw  
 UpdateData(); *^p^tK  
 UCHAR mask=0; )Vpt.4IBd  
 UCHAR key=0; A_I\6&b4  
 if(m_bControl) q'`LwAU}  
  mask|=4; XM:\N$tg  
 if(m_bAlt) _i2k$Nr  
  mask|=2; X 3(*bj>P  
 if(m_bShift) N$P\$  
  mask|=1; otdm r w|  
  key=Key_Table[m_Key.GetCurSel()]; g ?{o2gG  
 if(bRegistered){ :+meaxbu  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); cA B<'44R  
  bRegistered=FALSE; QJU\YH%}  
 } *m[[>wE  
 cMask=mask; o|y1m7X  
 cKey=key; jL:GP}I=  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); ZO]P9b  
 return bRegistered; a}'dIDj  
} d, 0Klew  
_''9-t;n,  
  四、小结 k6(0:/C  
8l >Xbz  
  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:
3+5=?,请输入中文答案:八 正确答案:八