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
  • 5708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: >\Qyg>Md]  
  /rd6p{F  
  一、实现方法 ]xf lfZ  
Qtmsk:qm  
  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: `pp"htm   
A9lnQCsJ  
#pragma data_seg("shareddata") {nH.  _  
HHOOK hHook =NULL; //钩子句柄 r4}:t$  
UINT nHookCount =0; //挂接的程序数目 'C6 K\E  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 &~ g||rq  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 cdL$T6y  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey $'}:nwq6x  
static int KeyCount =0; X*F#=.lh  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1  ]A;zY%>  
#pragma data_seg() #vhxW=L`=  
6Lw34R  
  关于共享段,有几点重要的说明:一是必须在链接选项里指定该段为共享:一种方法是在project->settings->link->object/library中加上/section:shareddata,rws;第二种方法是在def文件的sections里加上一句shareddata read write shared;第三种指定共享段的方法在程序里加上一句#pragma comment(linker,"section:shareddata,rws")。二是所有的变量必须初始化,否则链接程序会把它放到普通数据段。三是如果不初始化变量,需要在段外用"__declspec(allocate("shareddata")) 变量类型 变量名"的方式定义。 3=!\>0;E-  
_20nOg`o  
  DLL中的两个输出函数分别用来添加/删除热键,函数代码如下: ;o;P2}zD  
}Vw"7  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR sygAEL;.  
cKey,UCHAR cMask) >^%]F[Wo  
{ P@ '<OI  
 BOOL bAdded=FALSE; <`EZ^S L;  
 for(int index=0;index<MAX_KEY;index++){ V7u;"vD  
  if(hCallWnd[index]==0){ Oy$*ZG)  
   hCallWnd[index]=hWnd; `[V]xP%V  
   HotKey[index]=cKey; x$9UHEb kM  
   HotKeyMask[index]=cMask; ' jFSv|g+0  
   bAdded=TRUE; QK -_~9V  
   KeyCount++; n~ \"W  
   break; pR2QS  
  } > TG:}H(J  
 } EzK,SN#  
 return bAdded; UJ1Ui'a(!!  
} `,ZsKxI  
//删除热键 ~4o2!!^tI  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) hKb-l`KO  
{ epi{Ayb  
 BOOL bRemoved=FALSE; gQf'|%)AJ  
 for(int index=0;index<MAX_KEY;index++){ o Y_(UIa  
  if(hCallWnd[index]==hWnd){  :0ZFbIy  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ F*hOa|7/  
    hCallWnd[index]=NULL; ~a&s5E {  
    HotKey[index]=0; yhQv $D,^f  
    HotKeyMask[index]=0; zDY!0QZLF\  
    bRemoved=TRUE; HF}%Ow  
    KeyCount--; 2SEfEkk  
    break; :.6kXX'~  
   } xlF$PpRNM  
  } C5#3c yf*B  
 } JnH>L|G{;%  
 return bRemoved; A-r-^S0\  
} }X94M7+->  
cP63q|[[  
D1t@Y.vl  
  DLL中的钩子函数如下: qsn6i%VH  
Q PgM<ns  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) \D>vdn"Lx  
{ Z8+{ -  
 BOOL bProcessed=FALSE; *A.E?9pL\  
 if(HC_ACTION==nCode) c?5e|dZz  
 { U)a}XRS  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 si,fs%D&  
   switch(wParam) ECqcK~h#E  
   {  w+ gA3Dg  
    case VK_MENU: Zp]{e6J  
     MaskBits&=~ALTBIT; 6j@3C`Yd  
     break; "P`V|g  
    case VK_CONTROL: F)g.CDQ!c  
     MaskBits&=~CTRLBIT; :Lqz`  
     break; `|e?91@vEa  
    case VK_SHIFT: wMNtN3   
     MaskBits&=~SHIFTBIT; @V:4tG.<sw  
     break; W&dYH 4O  
    default: //judge the key and send message c*$&MCh  
     break;  bz'V50  
   } jdiFb~5R  
   for(int index=0;index<MAX_KEY;index++){ B'>(kZYMs  
    if(hCallWnd[index]==NULL) Q9=vgOW+  
     continue; 8nw_Jatk1  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) )| @'}k+  
    { H Yt& MK  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); yg\bCvL&  
     bProcessed=TRUE; @SeE,<  
    } YpMQY-n  
   } pJ-/"Q|:i  
  } qwJeeax  
  else if((lParam&0xc000ffff)==1){ //有键按下 9{_D"h}}  
   switch(wParam) )MqF~[k<-  
   { U,S&"`a  
    case VK_MENU: :{?8rA5  
     MaskBits|=ALTBIT; cN_e0;*Ua  
     break; \xJTsdd  
    case VK_CONTROL: /Ps}IW  
     MaskBits|=CTRLBIT; ujsJ;\c  
     break; '|Dm\cy  
    case VK_SHIFT: VXlTA>a }  
     MaskBits|=SHIFTBIT; bSsX)wHm  
     break; ]@_M)[ x  
    default: //judge the key and send message A$ v Cm  
     break; M0g!"0?  
   } u6h"=l {  
   for(int index=0;index<MAX_KEY;index++){ ?-[.H^]s~  
    if(hCallWnd[index]==NULL) F M:ax{  
     continue; +ew2+2  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) 5#/" 0:2  
    { G m40u/  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); l@7X gsey  
     bProcessed=TRUE; SFAh(+t  
    } @bU(z$eB  
   } [Dd?c,5AD  
  } 10xo<@l  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 <kIg>+  
   for(int index=0;index<MAX_KEY;index++){ o!EPF-:  
    if(hCallWnd[index]==NULL) } _Yk.@J5  
     continue; %cJ]Ds%V  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) ~jMdM~}  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); . OA_)J7  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 u|h>z|4lJj  
   } 3{B`[$  
  } uV?[eiezD0  
 } R06q~ >  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); Qag@#!&n  
} E8#r<=(m  
 so_  
  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: +o})Cs`|=A  
g(m3 &  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); \NwL#bQ~  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); mle"!*  
[I:D\)$<  
  为了添加应用程序对热键通知事件的响应,程序中用的办法是重载WindowProc()函数,该函数代码如下: 2^N 4(  
+V*FFv  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) AU@K5jwDwQ  
{ 0kP, Zj<  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) ?h4-D:!$L  
 { A8Q1x/d(  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 p|VoIQY  
  SaveBmp(); /]4[b!OTJ  
  return FALSE; aW$( lf2;  
 } 44axOk!G[/  
 …… //其它处理及默认处理 U{n< n8  
} KA1Z{7UK%  
=\H.C@r  
:FOMRrf7.  
  将屏幕图像保存到BMP文件中的任务是由函数SaveBmp()来完成的,具体实现参见代码部分。另外为了顺利实现屏幕抓图,程序中还实现了"托盘"功能,由于这一部分本书在实例中已经专门介绍过了,所以不再赘述,读者朋友可以参考相关实例。 H@%Y!z@\  
>AIkkQT  
  最后需要提醒读者朋友们注意的是,源程序的编译与使用时要先编译hook.dll并将其放在系统目录(win2000/NT是system32,98/ME是system),然后编译对话框程序运行即可。 TGx:#x*k  
biFy*+|  
  二、编程步骤 9Cbf[\J!bq  
n)$T zND  
  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"; J8w#J  
|KFRC)g  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; }I_/>58  
2@WF]*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; g|_-O" l  
j<w";I&Diz  
  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; Xi3:Ok6FZ  
Ht#5;c2/  
  5、 添加代码,编译运行程序。 En%PIkxeR  
]h8[b9$<")  
三、程序代码 @Q~Oc_z  
b}63?.M{  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL xJ H]>#XJ  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) ><9E^ k0.  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ Et{4*+A  
#if _MSC_VER > 1000 #x Z7%    
#pragma once aV3:wp]Gn  
#endif // _MSC_VER > 1000 F.ml]k&(m  
#ifndef __AFXWIN_H__ =y.!Ny5A  
#error include 'stdafx.h' before including this file for PCH _/0vmgQ&  
#endif q]+'{Ci@  
#include "resource.h" // main symbols Ru8k2d$B  
class CHookApp : public CWinApp nE+OBdl  
{ tM3eB= .*  
 public: D4WvRxki  
  CHookApp(); kx=.K'd5H  
  // Overrides Cw"Y=`  
  // ClassWizard generated virtual function overrides pX3Q@3,$  
  //{{AFX_VIRTUAL(CHookApp) mEsOYIu{  
 public: Nb/W+& y  
  virtual BOOL InitInstance(); f,{O%*PUA  
  virtual int ExitInstance(); h ,;f6  
  //}}AFX_VIRTUAL FWpcWmS`s  
  //{{AFX_MSG(CHookApp) ?u`+?" 'H  
  // NOTE - the ClassWizard will add and remove member functions here. `0a=A#]1o  
  // DO NOT EDIT what you see in these blocks of generated code ! K~Lh'6  
  //}}AFX_MSG 1j7^2Y|UT`  
  DECLARE_MESSAGE_MAP() '?Fw]z1$  
}; $oKT-G  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); w_o|k&~,  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); O!#yP Sq?  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); 1"k"<{%  
BOOL InitHotkey(); 3_k.`s_Z  
BOOL UnInit(); $S{B{FK  
#endif Cz@[l=-T7  
U_!Wg|  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. b?Dhhf  
#include "stdafx.h" ?CSc5b`eo  
#include "hook.h" d $~q  
#include <windowsx.h> CSF-2lSG  
#ifdef _DEBUG Z6@W)QX  
#define new DEBUG_NEW Y] Q=kI  
#undef THIS_FILE WN8XiV  
static char THIS_FILE[] = __FILE__; ,m<t/@^]  
#endif yhF{ cK =  
#define MAX_KEY 100 yu8xTh$:  
#define CTRLBIT 0x04 2xy &mNx  
#define ALTBIT 0x02 {s^vAD<~x3  
#define SHIFTBIT 0x01 CjW`cHd  
#pragma data_seg("shareddata") Kgev*xg  
HHOOK hHook =NULL; rGjP|v@3^  
UINT nHookCount =0; d&mSoPf  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey xb`,9.a7  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT I9JiH,+  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey 09FHE/L  
static int KeyCount =0; x3cno#  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift =2;2_u?  
#pragma data_seg() QU0FeGtz  
HINSTANCE hins; lP$bxUNt  
void VerifyWindow(); fB .xjp?  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) !ho~@sc{W  
//{{AFX_MSG_MAP(CHookApp) 9='a9\((mH  
// NOTE - the ClassWizard will add and remove mapping macros here. "`Y.N$M`k  
// DO NOT EDIT what you see in these blocks of generated code! 6:Eu[PE~w  
//}}AFX_MSG_MAP Nr24Rv  
END_MESSAGE_MAP() 7S"W7O1>  
tu.Tvtudzj  
CHookApp::CHookApp() Ur^~fW1 o  
{ 6|# +  
 // TODO: add construction code here, %Ot2bhK;  
 // Place all significant initialization in InitInstance k [6%+  
} RZwjc<T  
'rWu}#Nb  
CHookApp theApp; :)/%*<vq,  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) +n#kpi'T  
{ "'389*-  
 BOOL bProcessed=FALSE; 5v1f?btc  
 if(HC_ACTION==nCode) v.eNWp  
 { ARcPHV<(2  
  if((lParam&0xc0000000)==0xc0000000){// Key up W*D]?hXU;  
   switch(wParam) 0MV^-M   
   { 3I|&}+Z6  
    case VK_MENU: O3U6"{yJ)  
     MaskBits&=~ALTBIT; : z=C   
     break; ^Rgm3?7  
    case VK_CONTROL: "S#}iYp  
     MaskBits&=~CTRLBIT; ^Kvbpi,  
     break; :`FL95  
    case VK_SHIFT: iF.eBL%  
     MaskBits&=~SHIFTBIT; /]0-|Kg+R  
     break; )HLe8:PG~  
    default: //judge the key and send message P<Wtv;Z1Z  
     break; ] qT\z<}  
   } +o{]0~ y  
   for(int index=0;index<MAX_KEY;index++){ <p_r{  
    if(hCallWnd[index]==NULL) j/I^\Ms  
     continue; -68E]O  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) k-o(Q"[ '  
    { x2@Q5|a  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); ;4E.Yr*  
     bProcessed=TRUE; M$|r8%z1  
    } /jBjqE;_  
   } wI\ n%#  
  } YX||\  
  else if((lParam&0xc000ffff)==1){ //Key down n veHLHvC7  
   switch(wParam) .=y-T=}  
   { 2&L2G'  
    case VK_MENU: SZGeF;N  
     MaskBits|=ALTBIT; os=Pr{  
     break; MS`wd  
    case VK_CONTROL: <2{CR0]u  
     MaskBits|=CTRLBIT; yrp;G_  
     break; Tt,<@U[/}  
    case VK_SHIFT: P)h ZFX  
     MaskBits|=SHIFTBIT; FlWgTn>  
     break; z(-j%?  
    default: //judge the key and send message AOh\%|}  
     break; v0~'`*|&  
   } wUnz D)  
   for(int index=0;index<MAX_KEY;index++) SONv] ));  
   { \ C^fi}/]  
    if(hCallWnd[index]==NULL) n|G x29 E  
     continue; Y}G9(Ci&  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) |AY`OVgcKD  
    { /}%$fB  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); DK!QGATh  
     bProcessed=TRUE; {*/&`$0lH|  
    } cc LTA  
   } ba=-F4?  
  } vDG AC'  
  if(!bProcessed){ _$wXHONt  
   for(int index=0;index<MAX_KEY;index++){ {'.[N79xP  
    if(hCallWnd[index]==NULL) HnDz4eD  
     continue; Dd1\$RBo  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) FXpI-?#E<  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); ]n8 5.DF  
   } r8o9C  
  } [M:ag_rm+f  
 } Z0Tpz2m  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); m)5,ut/  
} pN-l82]'  
Bz&6kRPv  
BOOL InitHotkey() 4|?y [j6  
{ ~ULD{Ov'F  
 if(hHook!=NULL){ PP2>v|  
  nHookCount++; 7Wd}H Z  
  return TRUE; ;IN!H@bq  
 } Q]Kc< [E  
 else )oEHE7y  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); &#keI.,  
  if(hHook!=NULL) ;zMZ+GZ?;+  
   nHookCount++; -i,=sZXB  
  return (hHook!=NULL); R2]2#3`  
} /QA:`_</oh  
BOOL UnInit() 0j =xWC  
{ L7\ rx w  
 if(nHookCount>1){ =) Aav!  
  nHookCount--; y:C=Ni&,"  
  return TRUE; w=dTa5  
 } *%[L @WF  
 BOOL unhooked = UnhookWindowsHookEx(hHook); 4,nUCT  
 if(unhooked==TRUE){ (%bqeI!ob  
  nHookCount=0; RDX$Wy$@L  
  hHook=NULL; td}%reH  
 } LSX;|#AI  
 return unhooked; }^ g6Y3\  
} Q+Sx5JUR~  
vz\^Aa #fv  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) Ng1{ NI+S  
{ SxAZ2|/-  
 BOOL bAdded=FALSE; jrF#DDH?I  
 for(int index=0;index<MAX_KEY;index++){ IB'gY0*  
  if(hCallWnd[index]==0){ |a>W9Ym  
   hCallWnd[index]=hWnd; i4Ps#R_wx  
   HotKey[index]=cKey; #i t)  
   HotKeyMask[index]=cMask; 2YS1%<-g*  
   bAdded=TRUE; ,aA%,C.0U  
   KeyCount++; vs*Q {  
   break; p3Ey[kURp  
  } X:0-FCT;\  
 } \& KfIh8  
 return bAdded;  qHU=X"rn  
} 4!l%@R>O2  
x{o&nhuk[S  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) %^zGM^PD  
{ IP#?$X  
 BOOL bRemoved=FALSE; u0s25JY.%  
 for(int index=0;index<MAX_KEY;index++){ ,MmX(O0  
  if(hCallWnd[index]==hWnd){  D|8Pe{`  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ r+yl{  
    hCallWnd[index]=NULL; wjRv =[  
    HotKey[index]=0; 9fj8r3 F#  
    HotKeyMask[index]=0; K6..N\7  
    bRemoved=TRUE; #9's^}i  
    KeyCount--; Ub"6OT1tl  
    break; \DgWp:|  
   } +nOa&d\  
  } 8c1ma  
 } q]^Q?r<g::  
 return bRemoved; :S_3(/} \  
} ML)5nJD  
K:<0!C!  
void VerifyWindow()  ~T'!.^/  
{ 0v"h /  
 for(int i=0;i<MAX_KEY;i++){ Ok*aP+Wq  
  if(hCallWnd!=NULL){ gf]k@-)  
   if(!IsWindow(hCallWnd)){ >EJ`Z7E6  
    hCallWnd=NULL; ;d#`wSF`G  
    HotKey=0; $Fr>'H+i  
    HotKeyMask=0; sX,."@[  
    KeyCount--; DV6B_A{kI  
   } kJfMTfl,  
  } Jh6 z5xUV  
 } 1>"Yw|F-|3  
} aj\ zc I  
Wh7}G   
BOOL CHookApp::InitInstance() Y}aaW[  
{ bS2)L4MQY  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); {*lRI  
 hins=AfxGetInstanceHandle(); !^h{7NmP[  
 InitHotkey(); o4l=oY:'  
 return CWinApp::InitInstance(); s2N~p^  
}  FTk`Mq  
K7jz*|2  
int CHookApp::ExitInstance() Q"Ur*/-U  
{ ky^u.+cZ  
 VerifyWindow(); (vXes.|+t  
 UnInit(); ! ,v!7I  
 return CWinApp::ExitInstance(); zmEg4v'I  
} { d*?O  
sDF5  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file ' Akt5q  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) ?_<14%r;  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ IFd2r;W8  
#if _MSC_VER > 1000 F2bAo6~R  
#pragma once '{ I YANVT  
#endif // _MSC_VER > 1000 5m(V(@a3  
 fcLVE  
class CCaptureDlg : public CDialog TQjM3Ri=V  
{ D?Y j5eOa  
 // Construction q<2b,w==  
 public: r'/H3  
  BOOL bTray; d7)EzW|I;  
  BOOL bRegistered; "A0J~YvYWJ  
  BOOL RegisterHotkey(); 6t0-u~  
  UCHAR cKey; ybNy"2Wk  
  UCHAR cMask; 017(I:V?(:  
  void DeleteIcon(); =w#sCy  
  void AddIcon(); uz8Y)b  
  UINT nCount; 1|8<!Hx#-  
  void SaveBmp(); |mO4+:-~D+  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor >kN%R8*Sx  
  // Dialog Data 6Pzz= ai<  
  //{{AFX_DATA(CCaptureDlg) q,->E<8  
  enum { IDD = IDD_CAPTURE_DIALOG }; -NgL4?p=  
  CComboBox m_Key; <:gNx%R  
  BOOL m_bControl; m-h+UKt  
  BOOL m_bAlt; QaAWO  
  BOOL m_bShift; OY?x'h  
  CString m_Path; }.$5'VGO  
  CString m_Number;  E qc,/  
  //}}AFX_DATA #y4+O;{  
  // ClassWizard generated virtual function overrides )vcyoq  
  //{{AFX_VIRTUAL(CCaptureDlg) M6mJ'Q482  
 public: ZY Ci&l  
  virtual BOOL PreTranslateMessage(MSG* pMsg); p~!UE/V  
 protected: fSL'+l3  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support 7yDWcm_y  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); S.$/uDwo  
  //}}AFX_VIRTUAL P+j5_V{\b  
  // Implementation q4wS<, 3  
 protected: XzH"dDAVE  
  HICON m_hIcon; c|,6(4j>$  
  // Generated message map functions rgOc+[X  
  //{{AFX_MSG(CCaptureDlg) =SEgv;#KZ~  
  virtual BOOL OnInitDialog(); kbHfdA  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); F4xXJ"vc  
  afx_msg void OnPaint(); k9|8@3(h  
  afx_msg HCURSOR OnQueryDragIcon(); |[lmW%  
  virtual void OnCancel(); (TjY1,f!H  
  afx_msg void OnAbout(); {*jo,<4ee  
  afx_msg void OnBrowse(); +YA,HhX9  
  afx_msg void OnChange(); {0t-Q k  
 //}}AFX_MSG 0zC mU)ng  
 DECLARE_MESSAGE_MAP() l2lyi  
}; TODTR7yGo  
#endif m+ww  
; wpX  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file ]?$e Bbt  
#include "stdafx.h" PAUepO_  
#include "Capture.h" {"x>ewAf  
#include "CaptureDlg.h" {|Pg]#Wi&  
#include <windowsx.h> }bZcVc2  
#pragma comment(lib,"hook.lib") `1T?\  
#ifdef _DEBUG 0:SR29(p1  
#define new DEBUG_NEW Y>l92=G  
#undef THIS_FILE p!wx10b  
static char THIS_FILE[] = __FILE__; -3)]IA  
#endif `c )//o  
#define IDM_SHELL WM_USER+1 i7UE9Nyl*  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); >cE@m=[  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); .e,(}_[[<  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; A3#^R%2)W  
class CAboutDlg : public CDialog bx5f\)  
{ 3r[}'ba\  
 public: H}[kit*9  
  CAboutDlg(); :nPLQqXGQ  
  // Dialog Data 42Vz6 k:  
  //{{AFX_DATA(CAboutDlg) *NEA(9  
  enum { IDD = IDD_ABOUTBOX }; }0 BKKU+  
  //}}AFX_DATA ;<9dND  
  // ClassWizard generated virtual function overrides av.L%l&d  
  //{{AFX_VIRTUAL(CAboutDlg) E<|p9,M  
 protected: bhqs%B!:  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support Gop;!aV1*  
  //}}AFX_VIRTUAL u0M? l  
  // Implementation GF3"$?Cw  
 protected: v p>,}nx4  
  //{{AFX_MSG(CAboutDlg) 1lJY=`8qa  
  //}}AFX_MSG h ?Ni5  
  DECLARE_MESSAGE_MAP() IQ`#M~:  
}; ^-24S#KE  
<1L?Xhoc6  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) +frkC| .  
{ f.~-31  
 //{{AFX_DATA_INIT(CAboutDlg) 0)?.rthk4S  
 //}}AFX_DATA_INIT %~`y82r6  
} >\x   
VEuT!^0Z  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) PZDj)x_%B&  
{ S5W*,?  
 CDialog::DoDataExchange(pDX); %O! ~!'  
 //{{AFX_DATA_MAP(CAboutDlg) <![]=~z $  
 //}}AFX_DATA_MAP k70o=}  
} Jp0*Y-*Y  
giDe  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) n&`=.[+A  
 //{{AFX_MSG_MAP(CAboutDlg) SG)hrd  
 // No message handlers v`Iw:?)%  
 //}}AFX_MSG_MAP %DKQ   
END_MESSAGE_MAP() 5c W2  
ks=l Nz9  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) l.V{H<v}  
: CDialog(CCaptureDlg::IDD, pParent) .BWCGb2bH  
{ &6yh4-(7  
 //{{AFX_DATA_INIT(CCaptureDlg) lhyWlO  
  m_bControl = FALSE; !@r1B`]j+"  
  m_bAlt = FALSE; 2}ttC m  
  m_bShift = FALSE; _aR_ [  
  m_Path = _T("c:\\"); {!$E\e^d  
  m_Number = _T("0 picture captured."); AaVj^iy/X  
  nCount=0; $Ka-ZPy<#  
  bRegistered=FALSE; 7AE)P[  
  bTray=FALSE; " wB~*,Ny  
 //}}AFX_DATA_INIT |fJpX5W-l  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 w=]bj0<A=  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); D]{#!w(d  
} ;~2RWj=-  
nO'lN<L  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) <vP{U  
{ @F+zME   
 CDialog::DoDataExchange(pDX); c%5G3j  
 //{{AFX_DATA_MAP(CCaptureDlg) %`kO\q_  
  DDX_Control(pDX, IDC_KEY, m_Key); ,:Q+>h  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); .5i\L OTd  
  DDX_Check(pDX, IDC_ALT, m_bAlt); q13bV  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); kb27$4mm  
  DDX_Text(pDX, IDC_PATH, m_Path); wNHvYu lI  
  DDX_Text(pDX, IDC_NUMBER, m_Number); P|>pm]>C  
 //}}AFX_DATA_MAP N,iYUM?  
} HI` q!LPv  
6@"lIKeP  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) K>"]*#aBv  
//{{AFX_MSG_MAP(CCaptureDlg) 0 e}N{,&Y  
 ON_WM_SYSCOMMAND() QO0#p1fom'  
 ON_WM_PAINT() XS L*e  
 ON_WM_QUERYDRAGICON() iiWs]5  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) $50/wb6s  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) q0Hor   
 ON_BN_CLICKED(ID_CHANGE, OnChange) z qM:'x*  
//}}AFX_MSG_MAP 7Vn;LW  
END_MESSAGE_MAP() s/;iZiWK  
X ^ ?M4  
BOOL CCaptureDlg::OnInitDialog() @w%{yzr%  
{ ^#-i%V%  
 CDialog::OnInitDialog(); lK}W%hzU  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); i'[o,dbE  
 ASSERT(IDM_ABOUTBOX < 0xF000); Ewfzjc  
 CMenu* pSysMenu = GetSystemMenu(FALSE); !\)9fOLs  
 if (pSysMenu != NULL) N8]DW_bsB  
 { TVkC pO,H  
  CString strAboutMenu; zA~aiX  
  strAboutMenu.LoadString(IDS_ABOUTBOX); 7a,/DI2o  
  if (!strAboutMenu.IsEmpty()) p\"WX  
  { \Ax[/J2aO  
   pSysMenu->AppendMenu(MF_SEPARATOR); 5IwQ <V  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); h{J=Rq  
  } wM]j#  
 } yF~iVt  
 SetIcon(m_hIcon, TRUE); // Set big icon pb\W7G  
 SetIcon(m_hIcon, FALSE); // Set small icon TQor-Cymz  
 m_Key.SetCurSel(0); #@i1jZ  
 RegisterHotkey(); %,Pwo{SH  
 CMenu* pMenu=GetSystemMenu(FALSE); S)$)AN<O  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); da'7* &/  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); q|;Sn  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); m(B,a,g<  
 return TRUE; // return TRUE unless you set the focus to a control A6D@#(D  
} m(CbMu  
=b{!p|  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) X-Yy1"6m1  
{ 8 [z<gxP`?  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) jt*VD>ji  
 { &!adW@y  
  CAboutDlg dlgAbout; q=_&izmE'7  
  dlgAbout.DoModal(); c`F~vrr)X  
 } Zi!6dl ev  
 else JdP[ cN  
 { Ah_T tj  
  CDialog::OnSysCommand(nID, lParam); " ,qcqG(  
 } b8>2Y'X  
} JfrPK/Vn  
zv Dg1p  
void CCaptureDlg::OnPaint() !9n!:"(r  
{ N ?RJuDW  
 if (IsIconic()) ]+OHxCj:  
 { hj8S".A_  
  CPaintDC dc(this); // device context for painting #fuc`X3:HL  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); U&(TqRi,  
  // Center icon in client rectangle 'K"7Tex  
  int cxIcon = GetSystemMetrics(SM_CXICON); [pc6!qhDG&  
  int cyIcon = GetSystemMetrics(SM_CYICON); ';CL;A;  
  CRect rect; A3!xYG=+  
  GetClientRect(&rect); 9rCvnP=  
  int x = (rect.Width() - cxIcon + 1) / 2; ITq$8  
  int y = (rect.Height() - cyIcon + 1) / 2; _(TYR*  
  // Draw the icon UTThl2=+  
  dc.DrawIcon(x, y, m_hIcon); <+/:}S4w)  
 } -9L [eYn  
 else $PNS`@B  
 { DNh{J^S"}w  
  CDialog::OnPaint(); ]Zj6W9]m  
 } W,g0n=2V  
} HZG<aY="  
.t7mTpi  
HCURSOR CCaptureDlg::OnQueryDragIcon() !Q0aKkMfL  
{ =$^<@-;  
 return (HCURSOR) m_hIcon; LHS^[}x^1  
} 6{qI  
xpzQ"'be  
void CCaptureDlg::OnCancel() Hy_}e"  
{ 2f=7`1RCD  
 if(bTray) PN +<C7/  
  DeleteIcon(); 7wm9S4+|  
  CDialog::OnCancel(); ?9?eA^X%  
} .2si[:_(p  
 =Y0>b4  
void CCaptureDlg::OnAbout() pFUW7jE  
{ mHnHB.OL  
 CAboutDlg dlg; itp$c|{  
 dlg.DoModal(); =,UuQJ,l  
} 3=SN;cn  
D+y_&+&,t  
void CCaptureDlg::OnBrowse() fuwv,[m  
{ 8:iu 8c$  
 CString str; N@z+h  
 BROWSEINFO bi; oI!L2  
 char name[MAX_PATH]; RgPY,\_9+  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); P'#m1ntxQ  
 bi.hwndOwner=GetSafeHwnd(); O)MKEMuA  
 bi.pszDisplayName=name; DBl.bgf  
 bi.lpszTitle="Select folder"; 0lNVQxG  
 bi.ulFlags=BIF_RETURNONLYFSDIRS;  :GC <U|p  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); M}4%LjD  
 if(idl==NULL) (NUk{MTX  
  return; c'_-jdi`>_  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); bz_Zk  
 str.ReleaseBuffer(); |U?5% L  
 m_Path=str; l=5(5\  
 if(str.GetAt(str.GetLength()-1)!='\\') :Ia3yi#  
  m_Path+="\\"; oC>QJ(o,8  
 UpdateData(FALSE); ~V?O%1)k?\  
} )2}{fFa%  
YW9 [^  
void CCaptureDlg::SaveBmp() ~b/lr  
{ Y*;Z(W.V#  
 CDC dc; hNmC(saMGm  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); zM"OateA  
 CBitmap bm; "pdmz+k8S  
 int Width=GetSystemMetrics(SM_CXSCREEN); Gp'rN}i^  
 int Height=GetSystemMetrics(SM_CYSCREEN); SdBv?`u|g  
 bm.CreateCompatibleBitmap(&dc,Width,Height); b>=MG8  
 CDC tdc; 8hba3L_Z  
 tdc.CreateCompatibleDC(&dc); !}|n3wQ  
 CBitmap*pOld=tdc.SelectObject(&bm); KRQKL`}}  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); K#H}=Y A  
 tdc.SelectObject(pOld); t%ye :  
 BITMAP btm; \~d|MP}"F:  
 bm.GetBitmap(&btm); U(3+*'8r,1  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; 1%Xwk2l,8b  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); ]#P9.c_}  
 BITMAPINFOHEADER bih; j9u/R01d  
 bih.biBitCount=btm.bmBitsPixel; <#<4A0:  
 bih.biClrImportant=0; 3P~I' FQ  
 bih.biClrUsed=0; V.#,dDC@j  
 bih.biCompression=0; ewg&DBbN"  
 bih.biHeight=btm.bmHeight; 7YsBwo  
 bih.biPlanes=1; :zdMV6s  
 bih.biSize=sizeof(BITMAPINFOHEADER); ce th)Xm  
 bih.biSizeImage=size; =fG c?PQ  
 bih.biWidth=btm.bmWidth; |F[E h ~  
 bih.biXPelsPerMeter=0; exrsYo!%  
 bih.biYPelsPerMeter=0; r,X5@/  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); |P7c {  
 static int filecount=0; ks|[`FH  
 CString name; \~!9T5/*  
 name.Format("pict%04d.bmp",filecount++); Y)^qF)v,d  
 name=m_Path+name; 0Ci\(  
 BITMAPFILEHEADER bfh; ( ,1}P  
 bfh.bfReserved1=bfh.bfReserved2=0; RaT(^b(  
 bfh.bfType=((WORD)('M'<< 8)|'B'); Y,EReamp  
 bfh.bfSize=54+size; ofbNg_K>  
 bfh.bfOffBits=54; 6Ug( J$Ouh  
 CFile bf; 7uG@ hL36  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ EeGP E  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); @s!9 T  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); T P'  
  bf.WriteHuge(lpData,size); tu\;I{ h=0  
  bf.Close(); XH4!|wz  
  nCount++; ^|y6oj  
 } d%_v eVIe  
 GlobalFreePtr(lpData); pOP`n3m0  
 if(nCount==1) m qgA  
  m_Number.Format("%d picture captured.",nCount); .,zrr&Po  
 else DpjiE/*  
  m_Number.Format("%d pictures captured.",nCount); {a`t1oX(  
  UpdateData(FALSE); Jj+|>(P  
} 3 EH/6  
tdSy&]P  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) H_)\:gTG  
{ -=BQVJ_dK{  
 if(pMsg -> message == WM_KEYDOWN) .Tr!/mf_  
 { ]oB-qfbH  
  if(pMsg -> wParam == VK_ESCAPE) 5=%:CN!/@p  
   return TRUE; ixF '-  
  if(pMsg -> wParam == VK_RETURN) +F3@-A  
   return TRUE; (t'hWS  
 } ,jJ&x7ra8  
 return CDialog::PreTranslateMessage(pMsg); q[p+OpA  
} e! V`cg0  
Yqz(@( %  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) {<0=y#@u  
{ i5wXT  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ +U/+iI>0  
  SaveBmp(); %!%G\nv  
  return FALSE; t mAj  
} g a|RW0  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ 3YT>3f!\  
 CMenu pop; rFJ(t7\9h  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); 7U68|\fI!  
 CMenu*pMenu=pop.GetSubMenu(0); Nd!0\ "AE  
 pMenu->SetDefaultItem(ID_EXITICON); OB"Ur-hJ0  
 CPoint pt; S <~"\<ED  
 GetCursorPos(&pt); -oc@$*t  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); U-/-aNJ]U  
 if(id==ID_EXITICON) @+II@[ _lT  
  DeleteIcon(); iu!j#VO  
 else if(id==ID_EXIT) &}}c>]m  
  OnCancel(); gN#&Ag<?  
 return FALSE; w$I<WS{J:Z  
} l`c&nf6  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); ,b;eU[!]  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) ERcj$ [:T(  
 AddIcon(); O=E"n*U  
 return res; 9sYN7x  
} `s HrC  
ZuZe8&  
void CCaptureDlg::AddIcon() yZ?|u57  
{ I4'mU$)U  
 NOTIFYICONDATA data; N8a+X|3]0  
 data.cbSize=sizeof(NOTIFYICONDATA); *L_+rJj,  
 CString tip; Pd-0u> k  
 tip.LoadString(IDS_ICONTIP); W,&z:z>  
 data.hIcon=GetIcon(0); {p J{UJKv?  
 data.hWnd=GetSafeHwnd(); lx9tUTaus/  
 strcpy(data.szTip,tip); dXr=&@ 1  
 data.uCallbackMessage=IDM_SHELL; r ;:5P%:  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; !DsKa6Zj  
 data.uID=98; }^r=(  
 Shell_NotifyIcon(NIM_ADD,&data); xb/L AlJ  
 ShowWindow(SW_HIDE); E__^>=  
 bTray=TRUE; UeNa  
} SF$'$6x}  
H}m%=?y@  
void CCaptureDlg::DeleteIcon() E}eu]2=nU}  
{ y9W6e "  
 NOTIFYICONDATA data; yVA<-PlS<  
 data.cbSize=sizeof(NOTIFYICONDATA); tMM *m  
 data.hWnd=GetSafeHwnd(); 0I6[`*|SX  
 data.uID=98; S[!sJ-rG  
 Shell_NotifyIcon(NIM_DELETE,&data); & h)G>Sqc  
 ShowWindow(SW_SHOW); /H 3u^  
 SetForegroundWindow(); qMy>: ,)Z  
 ShowWindow(SW_SHOWNORMAL); vbT"}+^Sh  
 bTray=FALSE; -*q:B[d  
} \hGo D  
^rF{%1DT  
void CCaptureDlg::OnChange() cp@(y$  
{  L~F"  
 RegisterHotkey(); OO)m{5r,{  
} E.*TJ  
6zuWG0t  
BOOL CCaptureDlg::RegisterHotkey() E/x2LYH  
{ (`S32,=TS  
 UpdateData(); V %k #M  
 UCHAR mask=0; {#>>dILPr  
 UCHAR key=0; +#qW 0g  
 if(m_bControl) 8@`"ZzM  
  mask|=4; Z^t"!oY  
 if(m_bAlt) H/!_D f  
  mask|=2; $`7cs}#  
 if(m_bShift) &YMz3ugI  
  mask|=1; 9qyA{ |3  
  key=Key_Table[m_Key.GetCurSel()]; yEYlQ=[#  
 if(bRegistered){ OVr, {[r  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); s^5KFK1  
  bRegistered=FALSE; r\6 "mU  
 } IIC1T{D}v  
 cMask=mask; lwS6"2q  
 cKey=key; J:s^F n  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); 43cdWd%  
 return bRegistered; cYBv}ylw}R  
} SQ*dC  
AhjK*nJF  
  四、小结 7.hgne'<  
#"tHT<8u  
  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:
10+5=?,请输入中文答案:十五