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
  • 7232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: ji8 Rd"S  
  ,f1wN{P  
  一、实现方法 eP2 yU  
{Y@[hoHtF  
  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: >'T%=50YH  
;I7Z*'5!  
#pragma data_seg("shareddata") k Z3tz?Du  
HHOOK hHook =NULL; //钩子句柄 ;4_n:XUgo;  
UINT nHookCount =0; //挂接的程序数目 ;|^fAc~9{r  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 *@ o3{0[Z  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 @1 +/r?b  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey WIGb7}egR  
static int KeyCount =0; ?SAi t Q3  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 fBF}-{VX(  
#pragma data_seg() i Bi/9  
L9kP8&&KK  
  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。 ~8X' p6  
LH_2oJ\  
  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: ec0vg.>p  
ZRHTvxf  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR uJO*aA{K  
cKey,UCHAR cMask) /Yh([P>  
{ f6"j-IW[z  
 BOOL bAdded=FALSE; us cR/d  
 for(int index=0;index<MAX_KEY;index++){ ES~]rPVS  
  if(hCallWnd[index]==0){ }n=NHHtJ  
   hCallWnd[index]=hWnd; bk?\=4B:E  
   HotKey[index]=cKey; VO`A  
   HotKeyMask[index]=cMask; ) )F.|w  
   bAdded=TRUE; :d#NnR0^L  
   KeyCount++; Kaa*;T![  
   break; /f[_]LeV]  
  } 8vRiVJ8QS:  
 } lrE0)B5F  
 return bAdded; 9j"\Lr*o "  
} g3Q #B7A  
//删除热键 yS43>UK_W+  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) b?$09,{0  
{ 4TKi)0 #7  
 BOOL bRemoved=FALSE; }cT}G;L'-  
 for(int index=0;index<MAX_KEY;index++){ ;H=6u  
  if(hCallWnd[index]==hWnd){ 2ya`2 m  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ *O5+?J Z!  
    hCallWnd[index]=NULL; OS 6 )`  
    HotKey[index]=0; s`B'vyoaa  
    HotKeyMask[index]=0; k Mo)4 Xp  
    bRemoved=TRUE; _e 3'f:  
    KeyCount--; 5^dw!^d  
    break; `R> O5Rv  
   } 1fy{@j(W  
  } =FbfV*K 9  
 } pUr[MnQLf  
 return bRemoved; 7" [;M  
} ts]7 + 6V  
x\DkS,O  
' 7A7HDJ  
  DLL中的钩子函数如下: _#O?g=1  
FCWphpz  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) JW\"S  
{ +Xp;T`,v  
 BOOL bProcessed=FALSE;  {5udol5?  
 if(HC_ACTION==nCode) jveRiW@  
 { ~roHnJ>  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 k +Oq$Pi  
   switch(wParam) z!+<m<  
   {  a}K+w7VY\  
    case VK_MENU: l)8V:MK  
     MaskBits&=~ALTBIT; b{rmxtx  
     break; RtL<hD  
    case VK_CONTROL: B<LavX>F  
     MaskBits&=~CTRLBIT; %&XX*& q  
     break; WFd2_oAT  
    case VK_SHIFT: iV&#5I  
     MaskBits&=~SHIFTBIT; /v{[Z&z  
     break; )rj mJ  
    default: //judge the key and send message [}2.CM  
     break; aK{\8L3]  
   } mSfhl(<L  
   for(int index=0;index<MAX_KEY;index++){ l.x }I"tf  
    if(hCallWnd[index]==NULL) ECScx02  
     continue; pJz8e&wyLM  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) ry ?2 o!  
    { cPcV[6)5K9  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); C=IH#E=  
     bProcessed=TRUE; S nHAY <  
    } l5[xJH  
   } ".%LBs~$  
  } !r*;R\!n2  
  else if((lParam&0xc000ffff)==1){ //有键按下 kPH^X}O$  
   switch(wParam) Q /c WV  
   { }|Tg_+   
    case VK_MENU: LrMFzd}_O  
     MaskBits|=ALTBIT; -y?Z}5-rs  
     break; >@U<?wP  
    case VK_CONTROL: <o+ 7U  
     MaskBits|=CTRLBIT; k+[KD>;1  
     break; +ca296^  
    case VK_SHIFT: -ZP&zOsDr  
     MaskBits|=SHIFTBIT; gKN_~{{OD  
     break; b3xkJ&Z  
    default: //judge the key and send message j/D)UWkR  
     break; RRqMwy>%  
   } Jche79B  
   for(int index=0;index<MAX_KEY;index++){ o%%x'uC  
    if(hCallWnd[index]==NULL) i4n b#  
     continue; Oq,.Kz  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) sjI[Vq  
    { s;s-6%p  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); |WU`p  
     bProcessed=TRUE; e6HlOGPVQH  
    } tR* W-%  
   } Rr4CcM  
  } /]zib@i  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 |OZ>/l {  
   for(int index=0;index<MAX_KEY;index++){ O'-Zn]@.]  
    if(hCallWnd[index]==NULL) 9+I/y,aC  
     continue; 'c0'P%[5A  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) YeC,@d[  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); eCIRt/ uA  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 npcBpGL{  
   } D?}m h1#  
  } _qt;{,t  
 } ~f10ZB_k>'  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); \'+{X(]  
} 9]@J*A}=l  
f WjS)  
  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: `qDz=,)WP  
P9"D[uz  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); #)A?PO2  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); ckN(`W,xp  
CS5jJi"pD3  
  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: {]\uR-a(o  
3Ge<G  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) AKKU-5 B9c  
{ u45h{i-e  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) o|qeh<2=x  
 { qH%L"J  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 5u)^FIBj  
  SaveBmp(); {0vbC/?]  
  return FALSE; V\K m% vP  
 } ;D"P9b]9$  
 …… //其它处理及默认处理 V,XP&,no\j  
} p (xD/E  
_jrA?pY  
Z"~6yF  
  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。 uP{+?#a_-\  
P}+|`>L  
  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。 xUo)_P\_  
ys[i`~$  
  二、编程步骤 |<3Q+EB^  
K;y\[2;}e,  
  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"; OpbT63@L  
 TXD^Do5^  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数;  %*5g<5  
_"!{7e`Z  
  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; |t65# 1  
:*P___S=  
  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; oyN+pFVB:$  
ccN&h  
  5、 添加代码,编译运行程序。 ay:\P.`5)  
NkA6Cp[Q,1  
三、程序代码 h`EH~W0:z  
;;y@z[ >  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL 0^!,[oh6*  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) ^mgI%_?1  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ R!/,E  
#if _MSC_VER > 1000 ;%rs{XO9  
#pragma once oj^5G ]_ <  
#endif // _MSC_VER > 1000 KSgQ:_u4}  
#ifndef __AFXWIN_H__ W -C0 YU1  
#error include 'stdafx.h' before including this file for PCH [2QY  
#endif N}+B:l]Qy  
#include "resource.h" // main symbols P96Cw~<Q?  
class CHookApp : public CWinApp `z$uw  
{ v;bM.OL  
 public: -Ty<9(~S  
  CHookApp(); EAC(^+15K  
  // Overrides uF]D  
  // ClassWizard generated virtual function overrides #>E3'5b   
  //{{AFX_VIRTUAL(CHookApp) &Qtp"#{  
 public: f=_Bx2ub  
  virtual BOOL InitInstance(); 2yJ7]+Jd7Y  
  virtual int ExitInstance(); KtfkE\KP  
  //}}AFX_VIRTUAL q-3J.VLJ5H  
  //{{AFX_MSG(CHookApp) nz&b5Xb2  
  // NOTE - the ClassWizard will add and remove member functions here. dEQReD  
  // DO NOT EDIT what you see in these blocks of generated code ! |%:q hs,  
  //}}AFX_MSG )~?S0]j}  
  DECLARE_MESSAGE_MAP() [al(>Wr9  
}; C NzSBm  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); cy&  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); (}*\ {  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); F;?TR[4!k  
BOOL InitHotkey(); (EOec5qXU  
BOOL UnInit(); ]xJ'oBhy  
#endif ^Kw&=u  
,<;l"v(  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. K4?t' dd]  
#include "stdafx.h" JO& ;bT<  
#include "hook.h" pu2wEQ  
#include <windowsx.h> ,);= (r9  
#ifdef _DEBUG , `[Z`SUk`  
#define new DEBUG_NEW Qe @A5#  
#undef THIS_FILE =e-a&Ep-z  
static char THIS_FILE[] = __FILE__; Ersr\ZB  
#endif (s V]UGrZ  
#define MAX_KEY 100 j#LV7@H.e?  
#define CTRLBIT 0x04 D y`W5_xSz  
#define ALTBIT 0x02 B7Ki @)  
#define SHIFTBIT 0x01 ]|C_`,ux  
#pragma data_seg("shareddata") 1*!c X  
HHOOK hHook =NULL; 0,1L e$)6  
UINT nHookCount =0; @wYQLZ  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey P EX26==  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT _q$0lqq~u  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey %2@ Tj}xa  
static int KeyCount =0; |z!q r}i  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift Q QsVIHA  
#pragma data_seg() wL8bs- U  
HINSTANCE hins; (1kn):  
void VerifyWindow(); ]689Q%D  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) H7z>S G0  
//{{AFX_MSG_MAP(CHookApp) AQnJxIL:  
// NOTE - the ClassWizard will add and remove mapping macros here. z&C{8aQ'  
// DO NOT EDIT what you see in these blocks of generated code! -(/2_&"  
//}}AFX_MSG_MAP 3D?IG\3  
END_MESSAGE_MAP() :Bx+WW&P.i  
dDv{9D,  
CHookApp::CHookApp() B&%L`v2[  
{ RQj`9F  
 // TODO: add construction code here, xVsa,EX b  
 // Place all significant initialization in InitInstance LT,iS)dY+  
} a gmeiJT  
J+/}K>2#  
CHookApp theApp; vCy.CN$  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) XJ f+Eh  
{ 1V*8,YiC<  
 BOOL bProcessed=FALSE; hb /8Q  
 if(HC_ACTION==nCode) h"VpQhi  
 { hV3,^#9o  
  if((lParam&0xc0000000)==0xc0000000){// Key up 'WKu0Yi^'  
   switch(wParam) "B|nhd  
   { dxzvPgi?  
    case VK_MENU: 26\HV  
     MaskBits&=~ALTBIT;  /gqqKUx  
     break; ]Wy^VcqX  
    case VK_CONTROL: [ -9)T  
     MaskBits&=~CTRLBIT; V9+xL 1U#  
     break; (ZE%tbm2  
    case VK_SHIFT: CbTf"pl  
     MaskBits&=~SHIFTBIT; Qag|nLoT  
     break; ;x!,g5q"q  
    default: //judge the key and send message Z-4K?;g'k  
     break; X;s 3y{ku  
   } )^jQkfL  
   for(int index=0;index<MAX_KEY;index++){ iN:G/ss4O  
    if(hCallWnd[index]==NULL) s0C?Bb}?  
     continue; '`M#UuU  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) -{yDk$"  
    { DHh+%|e  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); SBCL1aM  
     bProcessed=TRUE;  _/8_,9H  
    } |Q5H9<*  
   } k9*J*7l-m  
  } ax-=n(   
  else if((lParam&0xc000ffff)==1){ //Key down 4'+d"Ok  
   switch(wParam) T4V[R N  
   { 0=N4O!X9  
    case VK_MENU: vbr~<JT=  
     MaskBits|=ALTBIT;  'P@=/  
     break; ucQezmie  
    case VK_CONTROL: G*)s%2c>h  
     MaskBits|=CTRLBIT; (A7T}znG  
     break; *)j@G:  
    case VK_SHIFT: (/T +Wpy?  
     MaskBits|=SHIFTBIT; XoDJzrL#  
     break; L/qZ ;{  
    default: //judge the key and send message tpv?`(DDU  
     break; #rhVzN-?)W  
   } 2LCc  
   for(int index=0;index<MAX_KEY;index++) Nb gp_:{  
   { $s e !8s"  
    if(hCallWnd[index]==NULL) Y;fuh[#  
     continue; A m2*-  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) '4af ],  
    { }U2[?  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN);  .LX?VD  
     bProcessed=TRUE; PRMZfYc  
    } 21.YO]Et  
   } !&@2  
  }  K&j' c  
  if(!bProcessed){ z `\# $  
   for(int index=0;index<MAX_KEY;index++){ bcq@N  
    if(hCallWnd[index]==NULL) -(6eVI  
     continue; .[edln  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) pO\ S#GnX  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); o&CghF  
   } b cC\  
  } l9]o\JFXk  
 } *Zc9yZl2  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); Rb{+Ki  
} 5/Ydv RB67  
aF D="Zh  
BOOL InitHotkey() 48lzOG  
{ @; W<dJ<X  
 if(hHook!=NULL){ c eqFQ  
  nHookCount++; E2>im>p  
  return TRUE; XZF%0g2$b  
 } ILNE 4n  
 else ^it4z gx@  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); =fY lzZh  
  if(hHook!=NULL) n(Qj||:  
   nHookCount++; S{o@QVbl  
  return (hHook!=NULL); .?A'6  
} ^/G?QR  
BOOL UnInit() 8r5xs-  
{ DG_}9M!DW@  
 if(nHookCount>1){ jjxIS  
  nHookCount--; RI?NB6U  
  return TRUE; #N; $  
 } cB{%u '  
 BOOL unhooked = UnhookWindowsHookEx(hHook); %rFP#L  
 if(unhooked==TRUE){ }%_qx|(P|t  
  nHookCount=0; HTxB=Q|  
  hHook=NULL; O:2 #_  
 } Tsu\oJ[  
 return unhooked; %wOOzp`  
} y@q1c*|  
QxKAXq@)i  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) [.M  
{ ty':`)  
 BOOL bAdded=FALSE; QyTh!QM~`  
 for(int index=0;index<MAX_KEY;index++){ IoQr+:_R  
  if(hCallWnd[index]==0){ yU> T8oFh  
   hCallWnd[index]=hWnd; 'T%IvJ#Xu  
   HotKey[index]=cKey; O2C6V>Q;  
   HotKeyMask[index]=cMask; ]OUD5T  
   bAdded=TRUE; $H4=QVj6  
   KeyCount++; 6KVV z/  
   break; ki#y&{v9Be  
  } K/DH / r  
 } XnD0eua#  
 return bAdded; 5Qb;2!  
} %?@x]B9Y8E  
=1O?jrl~q  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) AD(xaQ&T  
{ cnbo +U  
 BOOL bRemoved=FALSE; S 9WawI  
 for(int index=0;index<MAX_KEY;index++){ Lg8 ]dBXu  
  if(hCallWnd[index]==hWnd){ D4d]3|/T  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ *`%4loW  
    hCallWnd[index]=NULL; ~M*7N@D  
    HotKey[index]=0; sb'lZFSP~s  
    HotKeyMask[index]=0; sbzeY 1  
    bRemoved=TRUE; 9-B@GFB;8  
    KeyCount--; D^N[=q99&e  
    break;  X@cSP7b  
   } ?b5H 2 W  
  } se!g4XEWD  
 } }&mj.hGv  
 return bRemoved; {798=pC<.  
} AYt*'Zeg!s  
]Uu aN8  
void VerifyWindow() b"^\)|*4;  
{ Xp#~N_S$  
 for(int i=0;i<MAX_KEY;i++){ /GyEVCc  
  if(hCallWnd!=NULL){ o94P I*.  
   if(!IsWindow(hCallWnd)){ >;m{{nj  
    hCallWnd=NULL; (:JjQ`i  
    HotKey=0; Ln:lC( '  
    HotKeyMask=0; O!/ekU|,r  
    KeyCount--; ,b$z!dvhl  
   } Ac J>$L)  
  } 1p~5h(jI  
 } )mj<{Td`  
} l4zw]AYk+X  
,eDu$8J9  
BOOL CHookApp::InitInstance() <H!O:Mf_p  
{ {QMN=O&n  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); O 3G:0xF  
 hins=AfxGetInstanceHandle(); WBa /IM   
 InitHotkey(); xwi!:PAf,o  
 return CWinApp::InitInstance(); 3<+z46`?  
} a`s/qi  
=ydpU<aS  
int CHookApp::ExitInstance() <W?WUF  
{ 7O"hiDQ  
 VerifyWindow(); ("b*? : B  
 UnInit(); /Ad6+cY  
 return CWinApp::ExitInstance(); v3~FR,Kl  
} \PzN XQ$  
NfOp=X?Y  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file RFB(d=o5S  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) L(;.n>/  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ .3(;9};  
#if _MSC_VER > 1000 _Cj(fFL  
#pragma once mLQUcYfR  
#endif // _MSC_VER > 1000 (NPxab8e*  
gXF.on4B  
class CCaptureDlg : public CDialog / xs9.w8-  
{ 7pz\ScSe  
 // Construction @\!ww/QT  
 public: (xbIUz.  
  BOOL bTray; db'K!M)  
  BOOL bRegistered; y>)MAzz~\  
  BOOL RegisterHotkey(); eJW[ ]!  
  UCHAR cKey; 4? v,wq  
  UCHAR cMask; ,! hnm  
  void DeleteIcon(); V +.Q0$~F5  
  void AddIcon(); \<=IMa0  
  UINT nCount; &lUNy L  
  void SaveBmp(); RN vQ  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor Et.j1M|g  
  // Dialog Data ~oo'ky*H!  
  //{{AFX_DATA(CCaptureDlg)  J+lGh9G  
  enum { IDD = IDD_CAPTURE_DIALOG }; sSz%V[X WL  
  CComboBox m_Key; 86y%=!bS  
  BOOL m_bControl; I'?6~Sn3  
  BOOL m_bAlt; =E!x~S;N  
  BOOL m_bShift; a&N%|b K  
  CString m_Path; ? -CV %l  
  CString m_Number; k},>^qE  
  //}}AFX_DATA lYP~3wp99  
  // ClassWizard generated virtual function overrides s+'XQs^{aj  
  //{{AFX_VIRTUAL(CCaptureDlg) !:dL~n  
 public: b#A(*a_gN  
  virtual BOOL PreTranslateMessage(MSG* pMsg); Qne0kB5m  
 protected: IyOpju)?  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support IKo;9|2U  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); LfHzT<)|  
  //}}AFX_VIRTUAL yZ5 x8 8>  
  // Implementation }f]b't  
 protected: M}u1qXa  
  HICON m_hIcon; oE6|Zw  
  // Generated message map functions Fav^^vf*1  
  //{{AFX_MSG(CCaptureDlg) }s(C^0x  
  virtual BOOL OnInitDialog(); h07eE g  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); RT/qcS^Oz  
  afx_msg void OnPaint(); t{6ap+%L  
  afx_msg HCURSOR OnQueryDragIcon(); CIEJql?`  
  virtual void OnCancel(); X% X$Y6  
  afx_msg void OnAbout(); Hv8H.^D>  
  afx_msg void OnBrowse(); .$P|^Zx,  
  afx_msg void OnChange(); Vha'e3 o!  
 //}}AFX_MSG 4T%cTH:.9N  
 DECLARE_MESSAGE_MAP() 3(C :X1  
}; _F^$aZt?e  
#endif McP~}"!^  
qF'~F`6  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file 4~*Y];!Q  
#include "stdafx.h"  cLAe sj  
#include "Capture.h" 6{8/P'@/Zz  
#include "CaptureDlg.h" >J@egIKzP  
#include <windowsx.h> 05"qi6tncz  
#pragma comment(lib,"hook.lib") g}m+f] |  
#ifdef _DEBUG VyY.r#@  
#define new DEBUG_NEW yjFe'  
#undef THIS_FILE WcU@~05b  
static char THIS_FILE[] = __FILE__; QkL@JF]Re  
#endif @iRO7 6m  
#define IDM_SHELL WM_USER+1 Hit Ac8  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); 4#7Umj  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); 9qre|AA  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; v&r=-}z2!  
class CAboutDlg : public CDialog u1N1n;#  
{ ^aHh{BQ%  
 public: M%|f+u&  
  CAboutDlg(); !)nD xM`p  
  // Dialog Data I-bF{  
  //{{AFX_DATA(CAboutDlg) M/} aq  
  enum { IDD = IDD_ABOUTBOX }; z&>|*C.Y  
  //}}AFX_DATA UGCox-W"  
  // ClassWizard generated virtual function overrides p1~*;;F  
  //{{AFX_VIRTUAL(CAboutDlg) 6g~+( ({lQ  
 protected: {-h, ZdH^  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support fnWsm4  
  //}}AFX_VIRTUAL S/fW/W*/}  
  // Implementation CL1 oAk  
 protected: [%?y( q  
  //{{AFX_MSG(CAboutDlg) 2uL9.q  
  //}}AFX_MSG c.0]1  
  DECLARE_MESSAGE_MAP() F"[3c6yF  
}; ABZ06S/  
hiN/S|JN8y  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) lV)G@l[1  
{  NpR6  
 //{{AFX_DATA_INIT(CAboutDlg) 3nrqo<X  
 //}}AFX_DATA_INIT nP;;MX:B  
} !k-` eJ|  
5 VKcV&D  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) A0>x9XSkJ  
{ > H~6NBd5D  
 CDialog::DoDataExchange(pDX); q]XHa,"  
 //{{AFX_DATA_MAP(CAboutDlg) vhpvO >Q  
 //}}AFX_DATA_MAP 0bSz4<}  
} :u-.T.zZl  
) $#(ZL^m  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) N Bz%(? \  
 //{{AFX_MSG_MAP(CAboutDlg) GI_DhU]~)  
 // No message handlers !oGQ8 e  
 //}}AFX_MSG_MAP ?+\E3}:  
END_MESSAGE_MAP() ($S Lb6  
7E~4)k0<  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) ?:/|d\,7@  
: CDialog(CCaptureDlg::IDD, pParent) <m]wi7  
{ W&KM/9d  
 //{{AFX_DATA_INIT(CCaptureDlg) S(w\ZC  
  m_bControl = FALSE; )x[HuIRaa  
  m_bAlt = FALSE; -TS? fne)  
  m_bShift = FALSE; nvH|Ngg Q  
  m_Path = _T("c:\\"); ) Fx ?%  
  m_Number = _T("0 picture captured."); 0D~=SekQ 9  
  nCount=0; ZF'HM@cfo  
  bRegistered=FALSE; 3Oiy)f@{TF  
  bTray=FALSE; 11{y}J  
 //}}AFX_DATA_INIT )$_,?*fq:  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 )*D'csGc  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); +v-LL*fa  
} M _(2sq  
o%qkqK1  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) F~R7~ZE  
{ 7kd|K b(  
 CDialog::DoDataExchange(pDX); OD|1c6+X  
 //{{AFX_DATA_MAP(CCaptureDlg) ,ux+Qz5(  
  DDX_Control(pDX, IDC_KEY, m_Key); CL1 ;Inzl  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); l"5y?jT  
  DDX_Check(pDX, IDC_ALT, m_bAlt); TY6 rwU  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); q% E C  
  DDX_Text(pDX, IDC_PATH, m_Path); u*2JUI*  
  DDX_Text(pDX, IDC_NUMBER, m_Number); ]| WA#8_|  
 //}}AFX_DATA_MAP ]EN&SWh  
} $20s]ywS  
~-<:+9m  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) ._,trb>o  
//{{AFX_MSG_MAP(CCaptureDlg) 5 0Ad,mn<  
 ON_WM_SYSCOMMAND() FW Y[=S  
 ON_WM_PAINT() JJ-i_5\q  
 ON_WM_QUERYDRAGICON() U|?,N0%Z1  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) tT-=hDw  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) L[]BzsIv  
 ON_BN_CLICKED(ID_CHANGE, OnChange) -_|]N/v\  
//}}AFX_MSG_MAP zo44^=~%  
END_MESSAGE_MAP() hVf^  
h[Mdr  
BOOL CCaptureDlg::OnInitDialog() =fWdk\Wv  
{ vi|Zit  
 CDialog::OnInitDialog(); >UWStzH<  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); ZAeQ~ j~  
 ASSERT(IDM_ABOUTBOX < 0xF000); (}"S) #C  
 CMenu* pSysMenu = GetSystemMenu(FALSE); n1 v,#GE  
 if (pSysMenu != NULL) ?0z)EPQ|  
 { X" \}sl 5  
  CString strAboutMenu; sOQcx\dK  
  strAboutMenu.LoadString(IDS_ABOUTBOX); M=[th  
  if (!strAboutMenu.IsEmpty()) QiU_hz6?v  
  { r0Z+ RB^I  
   pSysMenu->AppendMenu(MF_SEPARATOR); H+`*Y<F@  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); *B{-uc3o  
  } v$3_o :  
 } #_fY4vEO  
 SetIcon(m_hIcon, TRUE); // Set big icon ?gG,t4D  
 SetIcon(m_hIcon, FALSE); // Set small icon MD4\QNUa)*  
 m_Key.SetCurSel(0); +?V0:Kz]  
 RegisterHotkey(); [+gzdLad  
 CMenu* pMenu=GetSystemMenu(FALSE); l&|)O6N  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); &k+*3.X  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); 0'@u!m?  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); >?V<$>12  
 return TRUE; // return TRUE unless you set the focus to a control )&z4_l8`=  
} -l JYr/MSL  
xFwXW )  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) 27iy4(4  
{ _+n;A46  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) w[sR7T9*  
 { [Xh\m DU.  
  CAboutDlg dlgAbout; pYh!]0n  
  dlgAbout.DoModal(); $T/#1w P  
 } = t-fYV  
 else Snx<]|  
 {  #>bT<  
  CDialog::OnSysCommand(nID, lParam); X HQh4W3  
 } ppFYc\&=  
} n ,1tD  
6(.H3bu  
void CCaptureDlg::OnPaint() 1J'pB;.]s  
{ =qX*]  
 if (IsIconic()) $',3Pv  
 { ^ $wJi9D6  
  CPaintDC dc(this); // device context for painting  "l2bx  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); ]#5^&w)'  
  // Center icon in client rectangle b^Z$hnh]S  
  int cxIcon = GetSystemMetrics(SM_CXICON); u G[!w!e  
  int cyIcon = GetSystemMetrics(SM_CYICON); P&\X`ZUA  
  CRect rect; tN}c0'H  
  GetClientRect(&rect); lM+ xU;  
  int x = (rect.Width() - cxIcon + 1) / 2; {_7Hz,2U  
  int y = (rect.Height() - cyIcon + 1) / 2; \k4pK &b  
  // Draw the icon |z+9km7,  
  dc.DrawIcon(x, y, m_hIcon); A6i et~h[  
 } [Auc*@  
 else m>YWxa   
 { <`+zvUx^?  
  CDialog::OnPaint(); -5xCQJ[  
 } xD0NZ~w%  
} H/`G  
a[i>;0  
HCURSOR CCaptureDlg::OnQueryDragIcon() Xl?YB Z}  
{ Y-]YDXrPQ  
 return (HCURSOR) m_hIcon; e`AUYli"  
} fkG##!  
4,zvFH*AH  
void CCaptureDlg::OnCancel() h>|u:]I>  
{ 3SFg#  
 if(bTray) :A#+=O0\z  
  DeleteIcon(); gY%&IHQ'  
  CDialog::OnCancel(); +;6)  
} <tW:LU(!  
~v\hIm3=m  
void CCaptureDlg::OnAbout() s ^3[W0hL  
{ oXbI5XY)wb  
 CAboutDlg dlg; 3G.r-  
 dlg.DoModal(); 0T0/fg(o  
} _25d%Ne0  
t\|J&4!Y  
void CCaptureDlg::OnBrowse() uOFnCy 4  
{ ArL-rJ{}  
 CString str; V4EM5 Z\k  
 BROWSEINFO bi; E\iJP^n  
 char name[MAX_PATH]; |K)p]i+  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); !%wdn33"  
 bi.hwndOwner=GetSafeHwnd(); wI>h%y-%!  
 bi.pszDisplayName=name; "qgu$N4/>  
 bi.lpszTitle="Select folder"; {NV:|M!  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; \ =Nm5:  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); &D)2KD"N  
 if(idl==NULL) dr{1CP  
  return; |i u2&p >  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); k#?| yP:  
 str.ReleaseBuffer(); P{Lg{I_w.B  
 m_Path=str; SXh?U,5u  
 if(str.GetAt(str.GetLength()-1)!='\\') %Gu][_.L  
  m_Path+="\\"; p_9g|B0D  
 UpdateData(FALSE); *(p7NYf1  
} }+_9"YQ:  
zU b8NOi  
void CCaptureDlg::SaveBmp() hMWo\qM  
{ ?DRR+n _  
 CDC dc; X?R |x[  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); :t%)5:@A  
 CBitmap bm; dEG ]riO  
 int Width=GetSystemMetrics(SM_CXSCREEN); Fn> <q:  
 int Height=GetSystemMetrics(SM_CYSCREEN); Uh%6LPg^  
 bm.CreateCompatibleBitmap(&dc,Width,Height); D!/0c]"  
 CDC tdc; #EFMgQO  
 tdc.CreateCompatibleDC(&dc); fzyzuS$  
 CBitmap*pOld=tdc.SelectObject(&bm); EU9[F b]  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); )6 k1 P  
 tdc.SelectObject(pOld); 3u4:l  
 BITMAP btm; V pH|R  
 bm.GetBitmap(&btm); *k4+ioFnKE  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; L W?&a3e  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); A9iQ{l  
 BITMAPINFOHEADER bih; _{mJ.1)V;  
 bih.biBitCount=btm.bmBitsPixel; !")WZq^`  
 bih.biClrImportant=0; 'xk1o,;  
 bih.biClrUsed=0; IW mHp]  
 bih.biCompression=0; ,0h3x$l)   
 bih.biHeight=btm.bmHeight; {Y^c*Iqn  
 bih.biPlanes=1; ozuIwzi7N  
 bih.biSize=sizeof(BITMAPINFOHEADER); s|E%~j[9  
 bih.biSizeImage=size; E^82==R  
 bih.biWidth=btm.bmWidth; j=\Mx6os  
 bih.biXPelsPerMeter=0; ,$ mLL  
 bih.biYPelsPerMeter=0; I^@.Aw t  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); mQL8QW[c  
 static int filecount=0; s6IP;}  
 CString name; ?jFc@t*\:  
 name.Format("pict%04d.bmp",filecount++); 3r`<(%\  
 name=m_Path+name; {>A 8g({i  
 BITMAPFILEHEADER bfh; k5C>_( A  
 bfh.bfReserved1=bfh.bfReserved2=0; TGtyJ3x\   
 bfh.bfType=((WORD)('M'<< 8)|'B'); ^7<[}u;qF  
 bfh.bfSize=54+size; p KnIQa[c  
 bfh.bfOffBits=54; l:x _j\  
 CFile bf; | 4 `.#4  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ g/!Otgfu  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); ff[C'  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); j 37:  
  bf.WriteHuge(lpData,size); p8_2y~ !  
  bf.Close(); juXC?2c  
  nCount++; |w4(rs-  
 } ,;c{9H  
 GlobalFreePtr(lpData); 4[Z1r~t\L  
 if(nCount==1) Q Y@nE  
  m_Number.Format("%d picture captured.",nCount); Q+lbN  
 else ;NBT 4  
  m_Number.Format("%d pictures captured.",nCount); 7fUi?41XA  
  UpdateData(FALSE); 7Y)s#FJ  
} y6\ [1nZ  
EL"4E',  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) kv/(rKLp*  
{ LK{a9` h  
 if(pMsg -> message == WM_KEYDOWN) uFWvtL?;_  
 { unpfA#&!"  
  if(pMsg -> wParam == VK_ESCAPE) ~ J%m  
   return TRUE; <jg8y'm@0  
  if(pMsg -> wParam == VK_RETURN) "AV1..mu  
   return TRUE; yTP[,bM  
 } Y5Ft96o))x  
 return CDialog::PreTranslateMessage(pMsg); roL}lM$  
} I51M}b,[d  
FU'^n6[<B  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) q;KshpfRMD  
{ ^fG`DjA)  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ g:;Ya?5N  
  SaveBmp(); !\3 }R25  
  return FALSE; Qf" 6PJ  
} s!NisF  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ `I@)<d  
 CMenu pop; {rs6"X^  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); 6NU8HJp  
 CMenu*pMenu=pop.GetSubMenu(0); )ynA:LXx  
 pMenu->SetDefaultItem(ID_EXITICON); 2YaTT& J  
 CPoint pt; GCZu<,  
 GetCursorPos(&pt); t&8<k+m  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); G[vUOEU ~O  
 if(id==ID_EXITICON) a pKa4nI  
  DeleteIcon(); g<0w/n!jmC  
 else if(id==ID_EXIT) Ja^7$WY  
  OnCancel(); J6= w:c  
 return FALSE; 1k*n1t):  
} MM=W9#  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); O\3r%=TF  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) LR hP7D+A  
 AddIcon(); }rFThI  
 return res; w/hh 4ir  
} 6vMDm0sv  
$>nkGb%Kp  
void CCaptureDlg::AddIcon() S.qk%NTTD  
{ t*eleNYeS~  
 NOTIFYICONDATA data; U.d'a~pH  
 data.cbSize=sizeof(NOTIFYICONDATA); UUZ6N ZQI  
 CString tip; e=0l<Rj  
 tip.LoadString(IDS_ICONTIP); :v|r=#OI  
 data.hIcon=GetIcon(0); ](]*]a4ss  
 data.hWnd=GetSafeHwnd(); $:xF)E  
 strcpy(data.szTip,tip); u XaL  
 data.uCallbackMessage=IDM_SHELL; 3- 4Nad  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; &@-1 "-H  
 data.uID=98; XCKY xv&  
 Shell_NotifyIcon(NIM_ADD,&data); cw*(L5b u  
 ShowWindow(SW_HIDE); *pDXcURw  
 bTray=TRUE; cr2{sGn|  
} )i},@T8[  
07~pf}  
void CCaptureDlg::DeleteIcon() !pG+Ak?  
{ G~Sy&XJuq  
 NOTIFYICONDATA data;  aOaF&6'j  
 data.cbSize=sizeof(NOTIFYICONDATA); N02zPC 8  
 data.hWnd=GetSafeHwnd(); %ZJ),9+  
 data.uID=98; ';i"?D?NAk  
 Shell_NotifyIcon(NIM_DELETE,&data); \=HfO?$ Ro  
 ShowWindow(SW_SHOW); hWl""66+5  
 SetForegroundWindow(); K7)j  
 ShowWindow(SW_SHOWNORMAL); ,Zf :R  
 bTray=FALSE; Y*]l|)a6_]  
} =U)n`#6_j2  
IwZZewb-a  
void CCaptureDlg::OnChange() qz-#LZFTR  
{ &':UlzG  
 RegisterHotkey(); /zChdjz  
} t;Fbt("]:  
COxZ Q  
BOOL CCaptureDlg::RegisterHotkey() @n5;|`)\  
{ $8<j5%/ $M  
 UpdateData(); GapX$Jb,p  
 UCHAR mask=0; zav*  
 UCHAR key=0; TmRrub  
 if(m_bControl) 'LtgA|c=  
  mask|=4; Ek gZxT_&  
 if(m_bAlt) Pu/-Qpqh  
  mask|=2; (cPeee%Q  
 if(m_bShift) Hsd|ka$x>  
  mask|=1; +9=@E  
  key=Key_Table[m_Key.GetCurSel()]; +ZD[[+  
 if(bRegistered){ Eg287B  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); ?NL&x  
  bRegistered=FALSE; I;bg?RsF  
 } X_^_r{  
 cMask=mask; Ww a41z  
 cKey=key; t?3{s\z8+  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); muqfSF  
 return bRegistered; N3S,33 8s  
}  tH<9  
M]%!n3Fb  
  四、小结 PVQ#>_~5  
|j.KFu845  
  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
如果您提交过一次失败了,可以用”恢复数据”来恢复帖子内容
认证码:
验证问题:
10+5=?,请输入中文答案:十五