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
  • 7870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: I^@.Aw t  
  V>r j$Nc]  
  一、实现方法 5)8 .  
0NrTJ R`  
  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: &<@%{h@=  
SKW;MVC  
#pragma data_seg("shareddata") .c03}RTC^  
HHOOK hHook =NULL; //钩子句柄 GeVc\$K-  
UINT nHookCount =0; //挂接的程序数目 @~hz_Nm@8  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 $^ubo5%  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 %^T!@uZr  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey rX:1_q`xA  
static int KeyCount =0; x~nQm]@`h  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 n{3| E3  
#pragma data_seg() L*v93;|s  
9[Y*k^.!  
  关于共享段,有几点重要的说明:一是必须在链接选项里指定该段为共享:一种方法是在project->settings->link->object/library中加上/section:shareddata,rws;第二种方法是在def文件的sections里加上一句shareddata read write shared;第三种指定共享段的方法在程序里加上一句#pragma comment(linker,"section:shareddata,rws")。二是所有的变量必须初始化,否则链接程序会把它放到普通数据段。三是如果不初始化变量,需要在段外用"__declspec(allocate("shareddata")) 变量类型 变量名"的方式定义。 O[L\T  
K]9tc)  
  DLL中的两个输出函数分别用来添加/删除热键,函数代码如下: rCkYfTYI  
}.OxJ=M  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR RpjSTV8Tkm  
cKey,UCHAR cMask) pb6 Q?QG,  
{ Z+Xc1W^  
 BOOL bAdded=FALSE; OK.-]()!  
 for(int index=0;index<MAX_KEY;index++){ 1-/4Y5?}  
  if(hCallWnd[index]==0){ Y6+k9$h  
   hCallWnd[index]=hWnd; N:d D*[QZ  
   HotKey[index]=cKey; zQn//7#-G  
   HotKeyMask[index]=cMask; Ae.]F)w_\  
   bAdded=TRUE; XA?WUR[e  
   KeyCount++; `k!UjO72  
   break; (%.</|u  
  } EtJD'&  
 } F-$Kv-f  
 return bAdded; 6S)$3Is  
} `TOX1cmw  
//删除热键 NPP3 (3C  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) +H[Q~P8'[  
{ H8( C>w-'  
 BOOL bRemoved=FALSE; 1ZKz3)K  
 for(int index=0;index<MAX_KEY;index++){ S7Qen6lm  
  if(hCallWnd[index]==hWnd){ 6OMb`A@/2  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ ]yw_n^@  
    hCallWnd[index]=NULL; `9:v*KuM#R  
    HotKey[index]=0; xTGP  
    HotKeyMask[index]=0; cK/PQsMP  
    bRemoved=TRUE; EmF]W+!z%  
    KeyCount--; ]S*E  
    break; cj`#Tg.  
   } ,b.kw}k  
  } r,QJG$ Jo  
 } #%;<FFu\  
 return bRemoved; ocq2  
} p?_'|#tz  
Y7*'QKz2  
2n _T2{  
  DLL中的钩子函数如下: @ca#U-:g  
W6)dUi :"  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) !'Gb$l!  
{ ZWov_  
 BOOL bProcessed=FALSE; ^Kb9@lz/  
 if(HC_ACTION==nCode) q#.rYzl0  
 { fp,1qzU[k  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 [f /v LLK  
   switch(wParam) w/hh 4ir  
   {  6vMDm0sv  
    case VK_MENU: $>nkGb%Kp  
     MaskBits&=~ALTBIT; S.qk%NTTD  
     break; t*eleNYeS~  
    case VK_CONTROL: O7! fI'R  
     MaskBits&=~CTRLBIT; UUZ6N ZQI  
     break; e=0l<Rj  
    case VK_SHIFT: :v|r=#OI  
     MaskBits&=~SHIFTBIT; ](]*]a4ss  
     break; $:xF)E  
    default: //judge the key and send message u XaL  
     break; uPM8GIvZX.  
   } W dei`u[  
   for(int index=0;index<MAX_KEY;index++){ iH($rSE  
    if(hCallWnd[index]==NULL) ~+7ad$   
     continue; +#^sy>  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) |^ 2rtI  
    { Y'3k E  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); 0G~%UYB-  
     bProcessed=TRUE; h9,wiT  
    } bM*Pcxv  
   } AM1/\R  
  } c _R)P,P  
  else if((lParam&0xc000ffff)==1){ //有键按下 6z1aG9G  
   switch(wParam) v=dKcruR:  
   { %V@Rk.<  
    case VK_MENU: L#83f]vG  
     MaskBits|=ALTBIT; C}t+t  
     break; *>?):-9"6N  
    case VK_CONTROL: ;LwFbkOuU  
     MaskBits|=CTRLBIT; fRZUY <t  
     break; \VoB=Ac&  
    case VK_SHIFT: cq+nWHqF{J  
     MaskBits|=SHIFTBIT; ?6_"nT*}  
     break; Ah(\%35&  
    default: //judge the key and send message MYur3lj%_  
     break; FKDamHL<  
   } buMiJzU  
   for(int index=0;index<MAX_KEY;index++){ COxZ Q  
    if(hCallWnd[index]==NULL) @n5;|`)\  
     continue; 'vqj5YTj  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) Qi(e`(,'  
    { /1[}G!  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); @5<]W+jk4  
     bProcessed=TRUE; e'}ePvN  
    } D2hAlV)i(  
   } P_:?}h\  
  } zsR  wF  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 hX{g]KE>  
   for(int index=0;index<MAX_KEY;index++){ +?4*,8Tmmz  
    if(hCallWnd[index]==NULL) +ZD[[+  
     continue; Eg287B  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) ?NL&x  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); I;bg?RsF  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 X_^_r{  
   } Ww a41z  
  } luP'JUq  
 } )]0[`iLe  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); ]4LT#  
} Yc. ~qmG/z  
-eSPoZ  
  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: mGM inzf  
"-~D! {rS  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); iXr`0V   
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); Ivd[U`=Q  
/ze_{{o  
  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: rFt,36#  
!."%M^J  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) ;f\R$u-  
{ !ch[I#&J-  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) )%H5iSNG$P  
 { B5?c'[V9  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 2V=FWuXC"  
  SaveBmp(); ?,+C!R?  
  return FALSE; >8F{lbEe  
 } g0; &/;"  
 …… //其它处理及默认处理 `E4!u=%  
} g:uaI  
cLN[o8 ZU  
]HZa:aPY  
  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。 '<{oYXZW3  
@+T{M:&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。 2F*Dkv  
g-{<v4NGI  
  二、编程步骤 'JW_]z1  
3^iQe"P%a@  
  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"; l1iF}>F2  
%BKR}  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; #h #mOJ5  
#1,>Qnl  
  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; dwf #~7h_  
l9ch  
  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; % 0y3/W  
Ztpm_P6  
  5、 添加代码,编译运行程序。 c9cphZ(z  
{C,1w  
三、程序代码 ]C!Y~  
8g2-8pa{  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL *Wuctu^9  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) ]y)R C-N  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ ]<o.aMdV  
#if _MSC_VER > 1000 (x@i,Ba@  
#pragma once ^V0{Ew /x  
#endif // _MSC_VER > 1000 c5mhl;+'  
#ifndef __AFXWIN_H__ M~g~LhsF  
#error include 'stdafx.h' before including this file for PCH -Uhl9 =  
#endif q!9v}R3(  
#include "resource.h" // main symbols U d=gdsL  
class CHookApp : public CWinApp 3 DO$^JJ.  
{ C.9eXa1wkT  
 public: )T$f k  
  CHookApp(); bTo@gJk n  
  // Overrides X~Rk ,d3  
  // ClassWizard generated virtual function overrides !=q:> }g  
  //{{AFX_VIRTUAL(CHookApp) '#An+;x{  
 public: P/1UCITq}  
  virtual BOOL InitInstance(); |<+|Du1  
  virtual int ExitInstance(); L]L~TA<D9i  
  //}}AFX_VIRTUAL @e?[oojrM  
  //{{AFX_MSG(CHookApp) u`H@Q&(^wa  
  // NOTE - the ClassWizard will add and remove member functions here. {eD>E(Y@z1  
  // DO NOT EDIT what you see in these blocks of generated code ! O( 5L2G  
  //}}AFX_MSG /PB3^d>Q2  
  DECLARE_MESSAGE_MAP() 61Iy{-/ZV  
}; >I8hFtAM  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); }5Tyzi(  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); .KwuhmR  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); a@a1TpLQ  
BOOL InitHotkey(); %\z COfN  
BOOL UnInit(); e2=,n6N]c  
#endif -R8!"~o  
=ZJ?xA8  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. U~B}vt  
#include "stdafx.h" =Gg)GSL^  
#include "hook.h" 2I(@aB+  
#include <windowsx.h> w]5f3CIm  
#ifdef _DEBUG MF`k~)bDV  
#define new DEBUG_NEW >. nt'BQ  
#undef THIS_FILE "<n"A7e  
static char THIS_FILE[] = __FILE__; /x8C70W^  
#endif :]z-Rz  
#define MAX_KEY 100 zHum&V8=H  
#define CTRLBIT 0x04 ??e#E[bI  
#define ALTBIT 0x02 OTtanJ?  
#define SHIFTBIT 0x01 YI\Cs=T/  
#pragma data_seg("shareddata") c7TWAG_+  
HHOOK hHook =NULL; 5P t}  
UINT nHookCount =0; 9{^B Tc  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey :7PSZc:xE  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT XL&eJ  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey ka9v2tE\  
static int KeyCount =0; 'N5r2JL[w  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift t=pkYq5t8  
#pragma data_seg() '/qe#S  
HINSTANCE hins; d(B;vL@R2V  
void VerifyWindow(); \z2hXT@D  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) u b>K^  
//{{AFX_MSG_MAP(CHookApp) O@(.ei*HJ!  
// NOTE - the ClassWizard will add and remove mapping macros here. }${ZI  
// DO NOT EDIT what you see in these blocks of generated code! ALt";8Oa  
//}}AFX_MSG_MAP ~\s &]L  
END_MESSAGE_MAP() Ud(dWj-/  
4.kkxQR7r  
CHookApp::CHookApp() Y;5^w=V  
{ t T/*ZzMq#  
 // TODO: add construction code here, ^~1@HcJo  
 // Place all significant initialization in InitInstance w!h{P38  
} Lzx(!<v  
2Lu{@*  
CHookApp theApp; xg1r 3  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) _<~Vxz9  
{ w.F3o4YP  
 BOOL bProcessed=FALSE; u'n%BVt   
 if(HC_ACTION==nCode) xXh]z |  
 { q\pc2Lh?^  
  if((lParam&0xc0000000)==0xc0000000){// Key up 4hr+GO@o(  
   switch(wParam) g8 *|" {  
   { ]~<T` )Hi  
    case VK_MENU: 5xV/&N  
     MaskBits&=~ALTBIT; C5z  
     break; I$qtfGr  
    case VK_CONTROL: McI4oD~"  
     MaskBits&=~CTRLBIT; {]m e?I  
     break; -a^sX%|Bl  
    case VK_SHIFT: ez9M]! 8Lt  
     MaskBits&=~SHIFTBIT; XV9'[V  
     break; }sNZQ89V*v  
    default: //judge the key and send message eDZ3SIZ  
     break; RKZk/ly  
   } gR6T]v  
   for(int index=0;index<MAX_KEY;index++){ yaGVY*M0  
    if(hCallWnd[index]==NULL) J0)WRn"h  
     continue; S gsR;)2  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) =,;3z/k%  
    { ^?VT y5yp  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); \Nn%*?f  
     bProcessed=TRUE; xF>w r r  
    } Xwq2;Bq  
   } Q-%=ZW Z  
  } E|}Nj}(*  
  else if((lParam&0xc000ffff)==1){ //Key down j%<@ui u  
   switch(wParam) 3~09)0"!d  
   { lxJ.h&"P  
    case VK_MENU: wDTV /"Y  
     MaskBits|=ALTBIT; rpI7W?hh  
     break; 2Yf;b9-k  
    case VK_CONTROL: 2F(\}%UT~  
     MaskBits|=CTRLBIT; _)H+..=  
     break; cmLu T/oV  
    case VK_SHIFT: AhZ  
     MaskBits|=SHIFTBIT; 39m"}26*E  
     break; Z#V\[  
    default: //judge the key and send message ng6p#F,3  
     break; }XE/5S}D  
   } Y]Nab0R&  
   for(int index=0;index<MAX_KEY;index++) PvCE}bY{}  
   { XD>@EYN<X  
    if(hCallWnd[index]==NULL) 1pr_d"#4  
     continue; KT?s\w  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) qq{N; C  
    { qk"=nAJX  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); jJnBwHp  
     bProcessed=TRUE; bL[W.O0  
    } Yx/~8K_%M?  
   } .`=PE&xq  
  } JEkVj']?  
  if(!bProcessed){ j_<n~ri-  
   for(int index=0;index<MAX_KEY;index++){ D[y|y 3F  
    if(hCallWnd[index]==NULL) 3&2q\]Y,  
     continue; b,A1(_pzi  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) 5Rp2O4Z  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); tzN;;h4C  
   } 6$.Xj\zl  
  } };sm8P{M  
 } O|m-k0n  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); dgD%I  
} ';V+~pi  
c$z_Zi!g#  
BOOL InitHotkey() LJ#P- `!{&  
{ e-meUf9  
 if(hHook!=NULL){ 2DQC)Pe+z  
  nHookCount++; ![n`n(oN  
  return TRUE; FaM~ 56Pa  
 } mMWNUkDq  
 else  ]bSt[  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); e5]0<s$  
  if(hHook!=NULL) \F3t&:  
   nHookCount++; k3kqgR*  
  return (hHook!=NULL); aE$p;I  
} a5&j=3)|  
BOOL UnInit() 5ZxBmQ  
{ )g F9D1eA  
 if(nHookCount>1){ Agf!6kh  
  nHookCount--; 2p ,6=8^v  
  return TRUE; J[AgOUc  
 } '>$A7  
 BOOL unhooked = UnhookWindowsHookEx(hHook); y70gNPuTOD  
 if(unhooked==TRUE){ |Ay#0uQ5Y  
  nHookCount=0; }y/t~f+  
  hHook=NULL; GTvb^+6  
 } ? xs0J  
 return unhooked; !*-cf$  
} ~h.B\Sc]Q  
R[t[M}q  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) ~ $&  
{ =)bc/309  
 BOOL bAdded=FALSE; RwKN  
 for(int index=0;index<MAX_KEY;index++){ Q+dI,5YF  
  if(hCallWnd[index]==0){ R/|o?qTrj  
   hCallWnd[index]=hWnd; `lzH:B  
   HotKey[index]=cKey; `,"Jc<R7Z  
   HotKeyMask[index]=cMask; 56dl;Z)  
   bAdded=TRUE; Z;:-8 HPDY  
   KeyCount++; w{IqzmPiH  
   break; -nSqB{s!SD  
  } >6 q@Tr  
 } j>23QPG`6U  
 return bAdded; "bH ~CG:Y  
} q<7n5kJ~  
w6 .HvH-@?  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) `r V,<  
{ |<$O5b'  
 BOOL bRemoved=FALSE; kA0 ^~  
 for(int index=0;index<MAX_KEY;index++){ Lf9h;z>#  
  if(hCallWnd[index]==hWnd){ ^g\%VIOD  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ Y8T.RS0  
    hCallWnd[index]=NULL; yvvR%]!.  
    HotKey[index]=0; ER+[gT1CQ  
    HotKeyMask[index]=0; uy~j$lrn  
    bRemoved=TRUE; ,s K-gw  
    KeyCount--; *<1m 2t>.  
    break; UHWun I S  
   } $Izk]o;X~  
  } @P?*<b{  
 } ^D)C|T  
 return bRemoved; %94"e7Hy  
} [<t*&Kr+o  
3*<W`yed  
void VerifyWindow() Iq*7F5B  
{ S"l&=J2dc  
 for(int i=0;i<MAX_KEY;i++){ teb(\% ,  
  if(hCallWnd!=NULL){  VM`."un]  
   if(!IsWindow(hCallWnd)){  f63q  
    hCallWnd=NULL; KtE`L4tW6  
    HotKey=0; /~:ztv\$M"  
    HotKeyMask=0; 78wcMQNX9  
    KeyCount--; BlCKJp{m$  
   } q$P"o].EK  
  } _U %B1s3y  
 } _DQdo  
} A@+.[[  
|Z;Av%%  
BOOL CHookApp::InitInstance() "P~>AXcq  
{ CAO$Zt  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); % |V:F.f  
 hins=AfxGetInstanceHandle(); :gXj( $  
 InitHotkey(); R.@GLx_zpQ  
 return CWinApp::InitInstance(); w&H7S{  
} ,ic}   
7VraWW`H'  
int CHookApp::ExitInstance() V#gXchH[L  
{ xS'So7:h  
 VerifyWindow(); [Pay<]c6g  
 UnInit(); =*pu+o,?  
 return CWinApp::ExitInstance(); n~Ix8|S h  
}  `S|gfJ  
KH-.Z0 2U  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file SWt"QqBU  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) iBCM?RiG  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ O7W}Z1G  
#if _MSC_VER > 1000 RN0Rk 8AC  
#pragma once ?d 4_'y   
#endif // _MSC_VER > 1000 +e\u4k{3V  
4b)xW&K{  
class CCaptureDlg : public CDialog lc^%:#@  
{ +x`tvo  
 // Construction {|cA[#j#  
 public: Tn|re Xc0e  
  BOOL bTray; Z6I!4K  
  BOOL bRegistered; Y*6*;0Kx  
  BOOL RegisterHotkey(); *T3"U|0_y  
  UCHAR cKey; +x1sV*S  
  UCHAR cMask; kDrGl{U}  
  void DeleteIcon(); <mxUgU  
  void AddIcon(); Ur@3_F  
  UINT nCount; =o {`vv  
  void SaveBmp(); j>U.(K  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor ~vgW:]i  
  // Dialog Data pT <H&  
  //{{AFX_DATA(CCaptureDlg) <NUZPX29  
  enum { IDD = IDD_CAPTURE_DIALOG }; cWi2Sls  
  CComboBox m_Key; mEA w^  
  BOOL m_bControl; uQDu<@5^[  
  BOOL m_bAlt; NJ~'`{3v  
  BOOL m_bShift; WJ%b9{<  
  CString m_Path; R$\ieNb  
  CString m_Number; 6 -oQs?  
  //}}AFX_DATA ` H"5nQRV  
  // ClassWizard generated virtual function overrides NQb?&.C   
  //{{AFX_VIRTUAL(CCaptureDlg) 8/=2N  
 public: L.5GX 29  
  virtual BOOL PreTranslateMessage(MSG* pMsg); c;WS !.  
 protected: w v1R ]3}  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support TS-[p d  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); (mzyA%;W  
  //}}AFX_VIRTUAL ~DSle 3  
  // Implementation ,{%[/#~6  
 protected: `hbM 2cM  
  HICON m_hIcon; N7[~Y2i  
  // Generated message map functions QRRZMdEGs[  
  //{{AFX_MSG(CCaptureDlg) up`6IWlLE  
  virtual BOOL OnInitDialog(); *Hs5MXNu  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); Lczcz"t  
  afx_msg void OnPaint(); :r\<DVj  
  afx_msg HCURSOR OnQueryDragIcon(); Tb}b*d3  
  virtual void OnCancel(); ALG +  
  afx_msg void OnAbout(); }"szL=s  
  afx_msg void OnBrowse(); (Fu9lW}n  
  afx_msg void OnChange(); 35ng_,t $  
 //}}AFX_MSG </fzBaTo  
 DECLARE_MESSAGE_MAP() V3UEuA  
}; n4ISHxM  
#endif m~}nM|m%  
f}fM%0/5  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file bv+PbK]iO  
#include "stdafx.h" n9#@ e}r  
#include "Capture.h" [P<oyd@#  
#include "CaptureDlg.h" 4"GY0) Q  
#include <windowsx.h> -1@kt<Es  
#pragma comment(lib,"hook.lib") Mqna0"IYx*  
#ifdef _DEBUG 'rSM6j  
#define new DEBUG_NEW F:n7yey  
#undef THIS_FILE 3o1j l2n  
static char THIS_FILE[] = __FILE__; !$O +M#  
#endif 5!wa\)wY  
#define IDM_SHELL WM_USER+1 1PWDK1GI8  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); y+c+/L8  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); F: \CDM=lS  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; >BiJ/[9  
class CAboutDlg : public CDialog 5nk]{ G> V  
{ H#f FU  
 public: \E n^Vf  
  CAboutDlg(); $:>K-4X\}  
  // Dialog Data ZN. #g_  
  //{{AFX_DATA(CAboutDlg) (u~@@d"  
  enum { IDD = IDD_ABOUTBOX }; Cjw|.c`  
  //}}AFX_DATA 1v`*%95  
  // ClassWizard generated virtual function overrides _- { >e  
  //{{AFX_VIRTUAL(CAboutDlg) V-VR+Ndz  
 protected: QqRL>.)W  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support W&* 0F~  
  //}}AFX_VIRTUAL ZM\Z2L]n  
  // Implementation WzF/wzR  
 protected: iZ&CE5+  
  //{{AFX_MSG(CAboutDlg) %kF6y_h`  
  //}}AFX_MSG D&.+Dx^G  
  DECLARE_MESSAGE_MAP() LnLuWr<;}  
}; o_{-X 1w  
]@_*O$  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) /CH*5w)1   
{ BYRf MtT@+  
 //{{AFX_DATA_INIT(CAboutDlg) SI-s:%O  
 //}}AFX_DATA_INIT M-eX>}CDm  
} -2f_e3jF  
Lb(=:Z!{  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) B%[Yu3gBo  
{ 1X]?-+',.  
 CDialog::DoDataExchange(pDX); :Oxrw5`=  
 //{{AFX_DATA_MAP(CAboutDlg) h^cM#L^B  
 //}}AFX_DATA_MAP "1Vuf<?C  
} g%Eb{~v  
0ZTT^2R  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) y%f'7YZ4  
 //{{AFX_MSG_MAP(CAboutDlg) T$!. :v  
 // No message handlers d7A vx  
 //}}AFX_MSG_MAP (V#5Cs,o:  
END_MESSAGE_MAP() N_wB  
WS4J a$*  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) %R."  
: CDialog(CCaptureDlg::IDD, pParent) \Gg6&:Ua  
{ &iez{[O  
 //{{AFX_DATA_INIT(CCaptureDlg) %qNT<>c  
  m_bControl = FALSE; ;~F&b:CyG  
  m_bAlt = FALSE; kyMWO*>|  
  m_bShift = FALSE; \s<L2uRj  
  m_Path = _T("c:\\"); T=%,^  
  m_Number = _T("0 picture captured."); 4 1q|R[js!  
  nCount=0; r761vtC#  
  bRegistered=FALSE; zW8rC!  
  bTray=FALSE; O,u$L  
 //}}AFX_DATA_INIT 8!sl) R  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 JZB7?@h%  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); (} ?")$.  
} <A<N? `"  
/d*d'3{c  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) N 8 n`f  
{ bu$YW'  
 CDialog::DoDataExchange(pDX); o-c.D=~  
 //{{AFX_DATA_MAP(CCaptureDlg) "=@X>jUc  
  DDX_Control(pDX, IDC_KEY, m_Key); O!#r2Y"?K1  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); '| WY 2>/(  
  DDX_Check(pDX, IDC_ALT, m_bAlt); ;Lr]w8d  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); B^nE^"b  
  DDX_Text(pDX, IDC_PATH, m_Path); *d b,N'rK  
  DDX_Text(pDX, IDC_NUMBER, m_Number); fgdqp8~  
 //}}AFX_DATA_MAP h8'`g 0  
} bL-+  
\xR1|M  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) b*(74>XY  
//{{AFX_MSG_MAP(CCaptureDlg) E+)3n[G  
 ON_WM_SYSCOMMAND() n 'gU  
 ON_WM_PAINT() ir !/{IQx  
 ON_WM_QUERYDRAGICON() 4d-f 6iiFV  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) ~lib~Y'-  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) it77x3Mm F  
 ON_BN_CLICKED(ID_CHANGE, OnChange) c&X2k\  
//}}AFX_MSG_MAP Cl&YN}t5  
END_MESSAGE_MAP() 2!QQypQ  
/-s-W<S[  
BOOL CCaptureDlg::OnInitDialog() ZW7z[,tk<.  
{ nHyqfd<V>  
 CDialog::OnInitDialog(); ^ZP $(a4  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); pr-=<[ d  
 ASSERT(IDM_ABOUTBOX < 0xF000); _Fkz^B*  
 CMenu* pSysMenu = GetSystemMenu(FALSE); %W` }  
 if (pSysMenu != NULL) e*)*__$O  
 { -aPRL HR  
  CString strAboutMenu; |kGj}v3  
  strAboutMenu.LoadString(IDS_ABOUTBOX); z[|2od  
  if (!strAboutMenu.IsEmpty()) iC2``[m"  
  { -?z#  
   pSysMenu->AppendMenu(MF_SEPARATOR); }JI@f14  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); [0MNq]gxf  
  } ?sD4S   
 } OGcq]ue  
 SetIcon(m_hIcon, TRUE); // Set big icon 5v5)vv.kd  
 SetIcon(m_hIcon, FALSE); // Set small icon p4-UW;Xu  
 m_Key.SetCurSel(0); n37P$0  
 RegisterHotkey(); :<gC7UW  
 CMenu* pMenu=GetSystemMenu(FALSE); YxowArV}uz  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); s_o{w"3X  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); z;iNfs0i$  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); V$0mcwH  
 return TRUE; // return TRUE unless you set the focus to a control .7BJq?K.  
} q<[m(]:  
_59f.FsVR  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) #K&XY6cTj  
{ )[wB:kG  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) ]}4JT  
 { HQ:Y:  
  CAboutDlg dlgAbout; 4g+Dp&U  
  dlgAbout.DoModal(); =aBc .PJ^  
 } :_k5[KT.]9  
 else |tN:o= 6  
 {  T_)G5a  
  CDialog::OnSysCommand(nID, lParam); Lo,uH`qU  
 } {^":^N)  
} {'cm;V+  
fj|X`,TiZ;  
void CCaptureDlg::OnPaint() tJ$gH;  
{ 2Y>#FEW/  
 if (IsIconic()) 4ibOVBG:*,  
 { #?"^:,Y  
  CPaintDC dc(this); // device context for painting A3^_'K  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); L.2!Q3&  
  // Center icon in client rectangle ^|%u%UR  
  int cxIcon = GetSystemMetrics(SM_CXICON); r(j:C%?}C  
  int cyIcon = GetSystemMetrics(SM_CYICON); ;W{2\ Es  
  CRect rect; +?)R}\\  
  GetClientRect(&rect); #(7^V y&  
  int x = (rect.Width() - cxIcon + 1) / 2; `l2h65\  
  int y = (rect.Height() - cyIcon + 1) / 2; 18,;2Sr44  
  // Draw the icon b|pp}il  
  dc.DrawIcon(x, y, m_hIcon); O@HL%ha  
 } QpCTHpZ  
 else (}m2}  
 { (&MtK1;;  
  CDialog::OnPaint(); %/oeV;D  
 } Cz|F%>y#  
} NK\0X5##.  
i&^]qL|J  
HCURSOR CCaptureDlg::OnQueryDragIcon() AO]k*N,N  
{ ?U+nR/H:6  
 return (HCURSOR) m_hIcon; DGbEQiX$\  
} _9yW; i-  
qh|fq b  
void CCaptureDlg::OnCancel() 6t=)1T  
{ .WLwAL  
 if(bTray) u-M Td  
  DeleteIcon(); )=nB32~J"  
  CDialog::OnCancel(); b$q~(Z}  
} V3Ep&<=/  
%6\L^RP  
void CCaptureDlg::OnAbout() 4&AGVplgF  
{ > -,$  
 CAboutDlg dlg; GXi)3I%  
 dlg.DoModal(); {ub'   
} V%'' GF   
 {b|V;/  
void CCaptureDlg::OnBrowse() ;#L]7ZY9:-  
{ B[~Q0lPih  
 CString str; <UY9<o  
 BROWSEINFO bi; &PPYxg<  
 char name[MAX_PATH]; 40aD\S>  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); tIk$4)ZAl  
 bi.hwndOwner=GetSafeHwnd(); 4C[kj  
 bi.pszDisplayName=name; 2 ?F?C  
 bi.lpszTitle="Select folder"; Z.`0  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; 97dF  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); =)}Yw)  
 if(idl==NULL) 5/R ~<z  
  return; O03F@v  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); G\R6=K:f7  
 str.ReleaseBuffer(); %Z8wUG  
 m_Path=str; T|p%4hH  
 if(str.GetAt(str.GetLength()-1)!='\\') r6&+pSA>  
  m_Path+="\\"; @^%YOorr  
 UpdateData(FALSE); g_@b- :$Yq  
} W=y9mW|p/  
Y()ZM  
void CCaptureDlg::SaveBmp() s<;{q+1#  
{ cv;2zq=T  
 CDC dc; P6")OWd  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); liBFx6\"S  
 CBitmap bm; )-m/(-  
 int Width=GetSystemMetrics(SM_CXSCREEN); ,#bT  
 int Height=GetSystemMetrics(SM_CYSCREEN); /IlO   
 bm.CreateCompatibleBitmap(&dc,Width,Height); FE1'MUT_  
 CDC tdc; Y.q$"lm7k  
 tdc.CreateCompatibleDC(&dc); cqaq~  
 CBitmap*pOld=tdc.SelectObject(&bm); OepQ Z|2  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); Gzp*Vr  
 tdc.SelectObject(pOld); v%kl*K`*  
 BITMAP btm; }zIWagC6  
 bm.GetBitmap(&btm); )Y`ybADd3  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; Bjh8uW G  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); y Ni3@f  
 BITMAPINFOHEADER bih; hY/qMK5  
 bih.biBitCount=btm.bmBitsPixel; ZFtJoGaR  
 bih.biClrImportant=0; >U.7>K V&  
 bih.biClrUsed=0; {N << JX  
 bih.biCompression=0; RBHU5]5  
 bih.biHeight=btm.bmHeight; 0KZ$v/m  
 bih.biPlanes=1; dGUiMix{N  
 bih.biSize=sizeof(BITMAPINFOHEADER); 21my9Ui]  
 bih.biSizeImage=size; |n;5D,r0C  
 bih.biWidth=btm.bmWidth; C)~%(< D  
 bih.biXPelsPerMeter=0; OnyAM{$g  
 bih.biYPelsPerMeter=0; T+PERz(  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); ~>Y^?l  
 static int filecount=0; Q3'P<"u  
 CString name; ;X:Bh8tEV  
 name.Format("pict%04d.bmp",filecount++); 8K@e8p( y  
 name=m_Path+name; Md0`/F:+2  
 BITMAPFILEHEADER bfh; 3[@:I^q  
 bfh.bfReserved1=bfh.bfReserved2=0; 2Sk hBb=d  
 bfh.bfType=((WORD)('M'<< 8)|'B'); |"[;0)dw^  
 bfh.bfSize=54+size; TEbIU8{Y  
 bfh.bfOffBits=54; r?|(t?  
 CFile bf; g-H,*^g+  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ QVah4wFL*.  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); GPx+]Jw8\  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); C`uL 4r  
  bf.WriteHuge(lpData,size); I+`>e*:@W  
  bf.Close(); P F);KQ  
  nCount++; {suQ"iv  
 } HdyE`FY\  
 GlobalFreePtr(lpData); w4R~0jXy  
 if(nCount==1) ti3S'K0t  
  m_Number.Format("%d picture captured.",nCount); }S4+1 U3  
 else %L$ ?Mey  
  m_Number.Format("%d pictures captured.",nCount); 8w#4T:hsuN  
  UpdateData(FALSE); o?+?@Xb'  
} DH bS=Iih  
n<F3&2w  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) It VVI"-  
{ f%JM a]yV  
 if(pMsg -> message == WM_KEYDOWN) =BbXSwv'(  
 { 8Pva]Q  
  if(pMsg -> wParam == VK_ESCAPE) 7jr+jNsowj  
   return TRUE; hu7o J H  
  if(pMsg -> wParam == VK_RETURN) @1qdnU  
   return TRUE; Nfv` )n@  
 } OB++5Wd  
 return CDialog::PreTranslateMessage(pMsg); i>C%[dk9  
} _n4_;0  
i2-]Xl  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) =4L%A=]`  
{ `-Tb=o}.  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ MwL!2r  
  SaveBmp(); CYsLyk  
  return FALSE; %s;5  
} s2F[v:|Wq  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ /XNC^!z6Js  
 CMenu pop; -S&d5(R  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); Zqv  
 CMenu*pMenu=pop.GetSubMenu(0); yTNHM_P  
 pMenu->SetDefaultItem(ID_EXITICON); IsVR4t]  
 CPoint pt; YS<KyTb"  
 GetCursorPos(&pt); }9N-2]  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); 7UqDPEXU]`  
 if(id==ID_EXITICON) 4QYStDFe  
  DeleteIcon(); vbtjPse  
 else if(id==ID_EXIT) eT?vZH[N  
  OnCancel(); `uqe[u;`6  
 return FALSE; k^#*x2b  
} 4^9qs%&  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); >wR)p\UEb  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) s7\Ee-x)s  
 AddIcon(); 9JeT1\VvHY  
 return res; Z`Jt6QgW  
} BAG#YZB  
nITkgN:s  
void CCaptureDlg::AddIcon() |x=(}g  
{ ,#9i=gp  
 NOTIFYICONDATA data; +i}uRO  
 data.cbSize=sizeof(NOTIFYICONDATA); MlLM $Y-@  
 CString tip; ,Ww.W'#P  
 tip.LoadString(IDS_ICONTIP); hM&VMa[  
 data.hIcon=GetIcon(0); y'<5P~W!a  
 data.hWnd=GetSafeHwnd(); p _2Yc]8  
 strcpy(data.szTip,tip); 6KE64: \;  
 data.uCallbackMessage=IDM_SHELL;  B`vC>  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; @PK 1  
 data.uID=98; iQgr8[ SFf  
 Shell_NotifyIcon(NIM_ADD,&data); + (`.pa z@  
 ShowWindow(SW_HIDE); a=sd&](_  
 bTray=TRUE; "|N0oEG&  
} #WE lL2&  
i3) 7Qa[  
void CCaptureDlg::DeleteIcon() |Qpd<L  
{ g6$\i m  
 NOTIFYICONDATA data; _s:5)  
 data.cbSize=sizeof(NOTIFYICONDATA); ) bd`U  
 data.hWnd=GetSafeHwnd(); Yf1%7+V35  
 data.uID=98; '#yIcV$  
 Shell_NotifyIcon(NIM_DELETE,&data); 2+K - I  
 ShowWindow(SW_SHOW); Cd_H<8__  
 SetForegroundWindow(); 'oM=ZU8wo  
 ShowWindow(SW_SHOWNORMAL); Wd7qpWItjQ  
 bTray=FALSE; X@/wsW(kM\  
} q9\(<<f|  
:3b\pEO9\  
void CCaptureDlg::OnChange() ]w]:9w  
{ YllW2g:  
 RegisterHotkey(); V<U9Pj^?^  
} q AsTiT6r  
1l^ `  
BOOL CCaptureDlg::RegisterHotkey() SP vKq=,  
{ Z}IuR|=  
 UpdateData(); +O8}twt@  
 UCHAR mask=0; <d[GGkY]=  
 UCHAR key=0; M=1~BZQ(Z  
 if(m_bControl) E};1 H  
  mask|=4; 4KW_#d`t  
 if(m_bAlt) >keY x<1  
  mask|=2; [t*-s1cq  
 if(m_bShift) @# . a5  
  mask|=1; roIc1Ax:  
  key=Key_Table[m_Key.GetCurSel()]; a,:Nlr3  
 if(bRegistered){  Sg(\+j=  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); &$h#9  
  bRegistered=FALSE; dd@ D s  
 } vtzbF1?O  
 cMask=mask; 3=0b  
 cKey=key; %4/X;w\3  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); g}BS:#$  
 return bRegistered; aq9Ej]1b  
} kZcGe*  
Re1}aLd  
  四、小结 5X9*K  
?9~|K/`l  
  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