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
  • 5974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: :NE/Ddgc'  
  rQr!R$t/[  
  一、实现方法 G5Ykbw#  
/XbW<dfl  
  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: sn{tra  
^sClz*%?  
#pragma data_seg("shareddata") )(TAT<  
HHOOK hHook =NULL; //钩子句柄 2*1ft>Uty  
UINT nHookCount =0; //挂接的程序数目 [po "To  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 +B"0{>n}F  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 @R q}nq=k  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey |"Z{I3Umg  
static int KeyCount =0; s\3q!A?S3  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 L:R<e#kgS  
#pragma data_seg() [*4fwk^  
@S3f:s0~D  
  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。 +!yX T C  
6Q Zp@  
  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: ;rHO&(h-  
0XU}B\'<  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR T@ YGB]*Y  
cKey,UCHAR cMask) ;_+uSalt  
{ Q8nId<\(  
 BOOL bAdded=FALSE; EL D!{bMT  
 for(int index=0;index<MAX_KEY;index++){ 5V5w:U>_z  
  if(hCallWnd[index]==0){ 'Jj=RAV`  
   hCallWnd[index]=hWnd; j*R,m1e8  
   HotKey[index]=cKey; N4!<Xj  
   HotKeyMask[index]=cMask; QP(BZJC  
   bAdded=TRUE; I;MD>%[W,  
   KeyCount++; q|(W-h+  
   break; I4c!m_sr  
  } /X*oS&-M  
 } sen=0SB/  
 return bAdded; A\sI<WrH  
} +OHGn;C  
//删除热键 l*=aMjd?  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) L 3XB"A#  
{ T)iW`vZg8  
 BOOL bRemoved=FALSE; CA s>AXbs  
 for(int index=0;index<MAX_KEY;index++){ b[ w;i]2  
  if(hCallWnd[index]==hWnd){ zJN7<sv  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ gAbD7SE  
    hCallWnd[index]=NULL; 5Fw - d  
    HotKey[index]=0; obH; g*  
    HotKeyMask[index]=0; $jzFc!rs  
    bRemoved=TRUE; nv/[I,nw  
    KeyCount--; _lxco=qd=%  
    break; P 7D!6q  
   } zGo|JF  
  } gFN 9jM  
 } r,(Mu  
 return bRemoved; YTaLjITG  
} L,_.$1d  
gE7L L=x  
!nf-}z e{  
  DLL中的钩子函数如下: /bRg?Q  
qSU| =  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) :l u5Uu~  
{ }j {!-&  
 BOOL bProcessed=FALSE; 6;b9swmh  
 if(HC_ACTION==nCode) 2-+f1,  
 { p s|)cW3`  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 IVxWxM*N<  
   switch(wParam) 2tQ`/!m>v$  
   {  JK_OZ  
    case VK_MENU: }?8uH/+ZA  
     MaskBits&=~ALTBIT; Yl cbW0'c  
     break; LRb, VD:/Y  
    case VK_CONTROL: )X+mV  
     MaskBits&=~CTRLBIT; >!6JKL~=  
     break; ^%T7.1'x  
    case VK_SHIFT: Qx3eLfm  
     MaskBits&=~SHIFTBIT;  Ukz;0q  
     break; 6=GZLpv  
    default: //judge the key and send message $14:(<  
     break; {tP%epQ  
   } p<Z3tD;Z  
   for(int index=0;index<MAX_KEY;index++){ },$0&/>ft  
    if(hCallWnd[index]==NULL) g=@_Z"  
     continue; |,C#:"z;  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) /! ajsn  
    { ~`MS~,,  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); iP@6hG`:  
     bProcessed=TRUE; wucV_p.E  
    } YvL?j  
   } tA.`k;LT  
  } 3Hi+Z}8  
  else if((lParam&0xc000ffff)==1){ //有键按下 tl yJmdl  
   switch(wParam) l: |D,q  
   { k`KGB  
    case VK_MENU: }ET,ysa  
     MaskBits|=ALTBIT; +|cI:|H>  
     break; } l 667N  
    case VK_CONTROL: KxGX\   
     MaskBits|=CTRLBIT; t0&@h\K  
     break; koG{ |elgB  
    case VK_SHIFT: p&p.Q^"ok  
     MaskBits|=SHIFTBIT; R6;Phdh<>  
     break; t:~t@4j}  
    default: //judge the key and send message .>g1 $rj  
     break; jR ~DToQ  
   } sfT+i;p  
   for(int index=0;index<MAX_KEY;index++){ /hWd/H]  
    if(hCallWnd[index]==NULL) kK>Xrj6  
     continue; q-$`k  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) `bI)<B  
    { &Nl2s ey  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); rM}0%J'  
     bProcessed=TRUE; o?Nu:&yE  
    } pcS+o  
   } _m E^rT  
  } \kIMDg3}  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 LHCsk{3  
   for(int index=0;index<MAX_KEY;index++){ :t$aN|>y  
    if(hCallWnd[index]==NULL) VaZn{z  
     continue; *V^ #ga#A  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) ] f>]n  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); q z&+=d@  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 r{Rg920  
   } &a)eJF]:!  
  } -cF'2Sfr  
 } 7k%T<;V  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); p0p4Xh1 e  
} *4Fr&^M\  
e&q?}Ho  
  抓图程序是一个基于对话框的程序,它在建立对话框的时候调用前面的DLL,登记热键,因此需要将hook.lib添加到工程里,在程序里给出两个DLL函数的定义,也可以写个头文件,再包含进来以下代码: \u OdALZ  
^)yTBn,  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); 's x\P[a  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); 2(!fg4#+  
=1;=  
  为了添加应用程序对热键通知事件的响应,程序中用的办法是重载WindowProc()函数,该函数代码如下: 5r {;CKKz  
,1{Ep`  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) .0HZNWRtb  
{ F51.N{'  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) `\Ku]6J]5  
 { #.B"q:CW*P  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 I8Vb-YeS  
  SaveBmp(); `\| ssC8u  
  return FALSE; a?5[k}\  
 } oS,I~}\kQ  
 …… //其它处理及默认处理 V_n<?9^4  
} )QiQn=Ce  
?/*~;fM  
+?D6T!)  
  将屏幕图像保存到BMP文件中的任务是由函数SaveBmp()来完成的,具体实现参见代码部分。另外为了顺利实现屏幕抓图,程序中还实现了"托盘"功能,由于这一部分本书在实例中已经专门介绍过了,所以不再赘述,读者朋友可以参考相关实例。 5 LP?Ij  
8euZTfK9e  
  最后需要提醒读者朋友们注意的是,源程序的编译与使用时要先编译hook.dll并将其放在系统目录(win2000/NT是system32,98/ME是system),然后编译对话框程序运行即可。 oT95^y\9  
HG >j5  
  二、编程步骤 >?W[PQ5yx  
{ >{B`e`$  
  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"; 7\ SUr9[  
/nx'Z0&+X  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; M&Y .;  
+ bhym+  
  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; ?ne_m:J[  
f2)XP$:  
  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; 7YWNd^FI V  
xom<P+M!|  
  5、 添加代码,编译运行程序。 $.St ej1  
{[Q0qi =  
三、程序代码 YMpf+kN  
1{"llD  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL :q##fG 'm/  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) =8 G&3 R  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ ']6VB,c`  
#if _MSC_VER > 1000 5m$2Ku  
#pragma once ]Z<_ " F  
#endif // _MSC_VER > 1000 H/F+X?t$0  
#ifndef __AFXWIN_H__ ^{@!['  
#error include 'stdafx.h' before including this file for PCH e59dVFug.U  
#endif dpZ;l 9  
#include "resource.h" // main symbols $9 p!Y}  
class CHookApp : public CWinApp E|"=. T  
{ Z-=YM P ]Q  
 public: n_K~ vD  
  CHookApp(); }$su4A@0  
  // Overrides JeH;v0  
  // ClassWizard generated virtual function overrides [^H"FA[  
  //{{AFX_VIRTUAL(CHookApp) FXKF\1`( H  
 public: OIb  
  virtual BOOL InitInstance(); XdgUqQb}  
  virtual int ExitInstance(); Tq<2`*Qs  
  //}}AFX_VIRTUAL dm rps+L  
  //{{AFX_MSG(CHookApp) @!=\R^#p  
  // NOTE - the ClassWizard will add and remove member functions here. =x#FbvV  
  // DO NOT EDIT what you see in these blocks of generated code ! -!qu"A:  
  //}}AFX_MSG vP!GJX &n5  
  DECLARE_MESSAGE_MAP() <{(/E0~V/<  
}; }SyxPXs  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); <M?:  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); tEd.'D8 s  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); 5,"l0nrk  
BOOL InitHotkey(); z:Sigo_z[  
BOOL UnInit(); mbl]>JsQD  
#endif xk~IN%\  
 84zTCX  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. %bXx!x8(  
#include "stdafx.h" ]6Ug>>x5  
#include "hook.h" zkM"cb13q/  
#include <windowsx.h> F^aR+m  
#ifdef _DEBUG 4] > ]-b  
#define new DEBUG_NEW `WEZ"5n  
#undef THIS_FILE *TW=/+j  
static char THIS_FILE[] = __FILE__; 9D\4n  
#endif Uh}seB#mJj  
#define MAX_KEY 100 ;Z[]{SQ  
#define CTRLBIT 0x04 V5}nOGV9  
#define ALTBIT 0x02 V2Q$g^X'  
#define SHIFTBIT 0x01 SD\= m/W  
#pragma data_seg("shareddata") /{2*WI;  
HHOOK hHook =NULL; }n,Zl>T9  
UINT nHookCount =0; Myat{OF  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey qMBR *f  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT zZ-wG  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey f67NWFX  
static int KeyCount =0; wbyE;W  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift ;#GoGb4AM  
#pragma data_seg() S&C1TC  
HINSTANCE hins; _:n b&B  
void VerifyWindow(); Gnm4gF!BI  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) FxG7Pk+=  
//{{AFX_MSG_MAP(CHookApp) Bc-yxjsw  
// NOTE - the ClassWizard will add and remove mapping macros here. B-.v0R`5  
// DO NOT EDIT what you see in these blocks of generated code! ?eV(1 Fr@  
//}}AFX_MSG_MAP $5`!Z%>/  
END_MESSAGE_MAP() 5y2? f  
8qi+IGRg  
CHookApp::CHookApp() Vpfp}pL  
{ _?7#MWe&  
 // TODO: add construction code here, 9ILIEm:  
 // Place all significant initialization in InitInstance ER2GjZa\z  
} *MN HT`Y^o  
M_ 0zC1  
CHookApp theApp; M/PFPJ >`  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam)  c9''  
{ O/%< }3Sq  
 BOOL bProcessed=FALSE; PeX1wK%f  
 if(HC_ACTION==nCode) >4m'tZ8  
 { xieP "6  
  if((lParam&0xc0000000)==0xc0000000){// Key up sH,kW|D  
   switch(wParam) 5/[H+O1;  
   { u/b7Z`yX}  
    case VK_MENU: h)lPi   
     MaskBits&=~ALTBIT; b/$km?R  
     break; :vx$vZb  
    case VK_CONTROL: 6Q4X 6U:WB  
     MaskBits&=~CTRLBIT; IJOvnZ("A  
     break; rn@`yTw^  
    case VK_SHIFT:  uD_v!  
     MaskBits&=~SHIFTBIT; X#xFFDzN  
     break; =M6[URZ  
    default: //judge the key and send message r#PMy$7L  
     break; _eSd nHWx  
   } K)7zKEp`cj  
   for(int index=0;index<MAX_KEY;index++){ Bsf7mcXz7z  
    if(hCallWnd[index]==NULL) -!RtH |P  
     continue; %1 KbS [  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) hjZ}C+=O  
    { JuRH>`  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); %Kh4m7  
     bProcessed=TRUE; %U7.7dSOI;  
    } -b&{+= ^c  
   }  v7  
  } 4PLk  
  else if((lParam&0xc000ffff)==1){ //Key down ,:Jus  
   switch(wParam) %\O#&=$E  
   { tary6K9K+  
    case VK_MENU: ,y`CRlr:  
     MaskBits|=ALTBIT; h<<>3A  
     break; m .IU ;cR  
    case VK_CONTROL: _i_Q?w`  
     MaskBits|=CTRLBIT; }TRAw#h  
     break; i=a-<A5x  
    case VK_SHIFT: iO /XhSD  
     MaskBits|=SHIFTBIT; Eh</? Qv\  
     break; ?,P3)&3g  
    default: //judge the key and send message 8VG!TpX/B  
     break; -W{DxN1  
   } &K_)#v`|  
   for(int index=0;index<MAX_KEY;index++) Tl]e%A`|  
   { $yDWu"R8  
    if(hCallWnd[index]==NULL) vgt]:$  
     continue; m~#!  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) NvE}eA#  
    { UEs7''6RM  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); %t=kdc0=_  
     bProcessed=TRUE; +=Jir1SLV  
    } ]=rht9),"  
   } x_=n-lAF  
  } U/ V  
  if(!bProcessed){ A61^[Y,dX_  
   for(int index=0;index<MAX_KEY;index++){ 'oNO-)p\#!  
    if(hCallWnd[index]==NULL) yw[#  
     continue; mOpTzg@  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) r;9 r!$d  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); # ?1Sm/5k`  
   } wHZW `  
  } <H3ezv1M  
 } # ,uya2!)  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); |yyO q  
} %+ 7p lM  
@J{m@ji{  
BOOL InitHotkey() G CRz<)1  
{ m^'uipa\  
 if(hHook!=NULL){ 65 z"  
  nHookCount++; 0.$hn  
  return TRUE; AL/?,%F  
 }  [=O/1T  
 else { pu85'DV  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); qbrpP(.  
  if(hHook!=NULL) Z UKf`m[  
   nHookCount++; .)1_Ew  
  return (hHook!=NULL); A,su;Q h  
} ]&Z))H  
BOOL UnInit() 64Lx -avf  
{ _0+0#! J!  
 if(nHookCount>1){ ]v[|B  
  nHookCount--; b[z]CP  
  return TRUE; jVLA CWH  
 } 2._X|~0a  
 BOOL unhooked = UnhookWindowsHookEx(hHook); umz;F  
 if(unhooked==TRUE){ 01!s"wjf  
  nHookCount=0; gVeEdo`$<  
  hHook=NULL; %h1N3\y9i(  
 } I%|>2}-_U  
 return unhooked; pEECHk  
} Y_`-9'&  
'|;X0fD  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) Bq/:Nd[y  
{ Cg*H.f%Mr  
 BOOL bAdded=FALSE; Pxn,Qw*  
 for(int index=0;index<MAX_KEY;index++){ sNun+xsf^  
  if(hCallWnd[index]==0){ IwGqf.!.>  
   hCallWnd[index]=hWnd; !4]9!<.k  
   HotKey[index]=cKey; .q+0pj  
   HotKeyMask[index]=cMask; l & Dxg  
   bAdded=TRUE; E .1J2Ne  
   KeyCount++; ?UM*Xah  
   break; f#ri'&}c :  
  } lKk/p^:  
 } KfF!{g f  
 return bAdded; vb9OonE2  
} Wg`R_>qQSm  
2Sm }On  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) Z{'i F   
{ r1RGTEkD  
 BOOL bRemoved=FALSE; UGK*Gy  
 for(int index=0;index<MAX_KEY;index++){ 1+?N#Fh  
  if(hCallWnd[index]==hWnd){ f6$b s+oP  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ iQ{G(^sZN  
    hCallWnd[index]=NULL; g^zs,4pPU<  
    HotKey[index]=0; .k,YlFvj  
    HotKeyMask[index]=0; @k&qb!Qah  
    bRemoved=TRUE; 4Qn$9D+?  
    KeyCount--; \W,I?Kx$  
    break; Q_l'o3  
   } Sna4wkbS  
  } ;# Q%j%J  
 } Jmx Ko+-  
 return bRemoved; 6;b~Ht  
} L5MzLE&~  
F-6c_!  
void VerifyWindow() +>JjvYx}\  
{ P;4w*((} ~  
 for(int i=0;i<MAX_KEY;i++){ HV<Lf 6gE  
  if(hCallWnd!=NULL){ $ImrOf^qt  
   if(!IsWindow(hCallWnd)){ o.I6ulY8  
    hCallWnd=NULL; Yup3^E w&  
    HotKey=0; v0L\0&+  
    HotKeyMask=0; 5h;+Ky!I  
    KeyCount--; 7g3 >jh  
   } ,a#EW+" Z  
  } 4>J   
 } AlJ} >u  
} Q|@4bzi)  
E lUEteZ  
BOOL CHookApp::InitInstance() 0Lb4'25.  
{ <F04GO\  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); S{3nM<  
 hins=AfxGetInstanceHandle(); NFv>B>  
 InitHotkey(); bJD;>"*  
 return CWinApp::InitInstance(); V*~Zs'L'E  
} c [5KG}  
*z7dl5xJ  
int CHookApp::ExitInstance() 0 iJue &  
{ j1(D]Z=\  
 VerifyWindow(); 2PG [7u^  
 UnInit(); xMBaVlEN  
 return CWinApp::ExitInstance(); <m'ow  
} VH:]@x//{  
M+x,opl  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file aFLO{tr`  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) yxc=Z0~1  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ LCQE_}Mh  
#if _MSC_VER > 1000 h\'n**f_x  
#pragma once +U@<\kIF  
#endif // _MSC_VER > 1000 "]G\9b)   
Sf r&p>{,  
class CCaptureDlg : public CDialog 1m.W<  
{ 'g{9@PkGn  
 // Construction ZIF49`Y4TF  
 public: J4\qEO  
  BOOL bTray; b Ax?&$  
  BOOL bRegistered; `[n(" 7,  
  BOOL RegisterHotkey(); }C|dyyr  
  UCHAR cKey; *Aa?yg:=  
  UCHAR cMask; CJ++?hB]X  
  void DeleteIcon(); Cn[0(s6  
  void AddIcon(); `Ry]y"K  
  UINT nCount; ERN>don2  
  void SaveBmp(); >i6yl5s  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor {+@bZ}57  
  // Dialog Data b?'yAXk  
  //{{AFX_DATA(CCaptureDlg) ?)#5X_V-q  
  enum { IDD = IDD_CAPTURE_DIALOG }; -uy`!A  
  CComboBox m_Key; RG4sQ0  
  BOOL m_bControl; J^g!++|2P  
  BOOL m_bAlt; ~JH:EB:  
  BOOL m_bShift; Gmz6$^D   
  CString m_Path; @qHNE,K  
  CString m_Number; n9xAPB }  
  //}}AFX_DATA EE W_gFn  
  // ClassWizard generated virtual function overrides }3L@J8:D"  
  //{{AFX_VIRTUAL(CCaptureDlg) YGsWu7dG  
 public: jXMyPNTK  
  virtual BOOL PreTranslateMessage(MSG* pMsg); ]S5JUAGkE*  
 protected: C;vtY[}<  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support `FC(  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); ~Onoe $A[<  
  //}}AFX_VIRTUAL Dv/WE>?Aw  
  // Implementation NSDv ;|f  
 protected: lgtC|k M=  
  HICON m_hIcon; aUtnR<6  
  // Generated message map functions aX}P|l  
  //{{AFX_MSG(CCaptureDlg) ,c)uX#1  
  virtual BOOL OnInitDialog(); (#E.`e1#6  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); >#y^;/bb  
  afx_msg void OnPaint(); I}vmU^Y>  
  afx_msg HCURSOR OnQueryDragIcon(); |a!fhl+  
  virtual void OnCancel(); Bb"Bg\le,^  
  afx_msg void OnAbout(); `WH"%V:"Q  
  afx_msg void OnBrowse(); E3iW-B8u8  
  afx_msg void OnChange(); _\GC(  
 //}}AFX_MSG n;T7=1_"  
 DECLARE_MESSAGE_MAP() iS<I0\D  
}; y7i*s^ys{  
#endif ?n ZY)  
]h5Yg/sms  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file oczN5YSt  
#include "stdafx.h" Pw61_ZZ4B\  
#include "Capture.h" ixT:)|'i  
#include "CaptureDlg.h" H?X|(r|+  
#include <windowsx.h> W!>.$4Q9  
#pragma comment(lib,"hook.lib") rq/I` :  
#ifdef _DEBUG 2mGaD\?K  
#define new DEBUG_NEW vCw e'q`1  
#undef THIS_FILE 8 {X"h#  
static char THIS_FILE[] = __FILE__; 5w@4:$=I  
#endif H,u<|UMM_  
#define IDM_SHELL WM_USER+1 +lMX{es\O  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); !_cg\K U#  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); yLQ*"sw\  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; z\%Ls   
class CAboutDlg : public CDialog Xn%pNxUL  
{ bq:(u4 3  
 public: o_^?n[4  
  CAboutDlg(); n4#;k=mA  
  // Dialog Data  VN\W]jT  
  //{{AFX_DATA(CAboutDlg) suzZdkMA  
  enum { IDD = IDD_ABOUTBOX }; 3 C<L  
  //}}AFX_DATA :dQ B R  
  // ClassWizard generated virtual function overrides T"DlT/\  
  //{{AFX_VIRTUAL(CAboutDlg) [.uG5%fa  
 protected: v63"^%LX  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support In<n&ib  
  //}}AFX_VIRTUAL Gf<'WQ[  
  // Implementation \S! e![L/  
 protected: 5?F__Hx*2  
  //{{AFX_MSG(CAboutDlg) ei[j1F  
  //}}AFX_MSG x?2@9u8Yb  
  DECLARE_MESSAGE_MAP() zZ` _D|<m  
}; P<a)25be/  
sWc*5Rt  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) .xm.DRk3  
{ B=^)Ub5'  
 //{{AFX_DATA_INIT(CAboutDlg) L"4mL,  
 //}}AFX_DATA_INIT rFj-kojg  
} Pu*6"}#~  
lY?QQ01D  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) Ne[7gxpu  
{ K|hjEQRv  
 CDialog::DoDataExchange(pDX); F|e1"PkeoA  
 //{{AFX_DATA_MAP(CAboutDlg) #\ X#w<\?  
 //}}AFX_DATA_MAP rp!oO>F  
} 4hTMbS_;  
noml8o  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) HiR[(5vnf  
 //{{AFX_MSG_MAP(CAboutDlg) {^7Hgg  
 // No message handlers 5BlR1*  
 //}}AFX_MSG_MAP ?7.7`1m !v  
END_MESSAGE_MAP() IpcNuZo9&  
~l]ve,W[  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) , P70J b  
: CDialog(CCaptureDlg::IDD, pParent) CkoL TY  
{ "J [K 3  
 //{{AFX_DATA_INIT(CCaptureDlg) 10q'Z}34  
  m_bControl = FALSE; 0Tx{3#  
  m_bAlt = FALSE; ~,oMz<iMV  
  m_bShift = FALSE; ;h*K}U  
  m_Path = _T("c:\\"); w~"KA6^  
  m_Number = _T("0 picture captured."); ebUBrxZX  
  nCount=0; 7!EBH(,z  
  bRegistered=FALSE; v*SEb~[  
  bTray=FALSE; Q;43[1&3w  
 //}}AFX_DATA_INIT rA5=dJ"I  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 '%dfz K*Z  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); #><.oreXq  
} :UF%K>k2  
2[ RoxKm  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) tG9BfGF  
{ Ay5i+)MD  
 CDialog::DoDataExchange(pDX); QxVq^H  
 //{{AFX_DATA_MAP(CCaptureDlg) G MX?  
  DDX_Control(pDX, IDC_KEY, m_Key); $c:ynjL|P-  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); Vzdh8)Mu\  
  DDX_Check(pDX, IDC_ALT, m_bAlt); \Zqng  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); naYrpK,.  
  DDX_Text(pDX, IDC_PATH, m_Path); [z`31F  
  DDX_Text(pDX, IDC_NUMBER, m_Number); MGR!Z@1y  
 //}}AFX_DATA_MAP .!$*:4ok  
} s;S?;(QI  
XWS%zLaK  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) j/r]wd"aUS  
//{{AFX_MSG_MAP(CCaptureDlg) r? NznNVU  
 ON_WM_SYSCOMMAND() 5q;GIw^L  
 ON_WM_PAINT() UEM(@zD]  
 ON_WM_QUERYDRAGICON() GqaDL3Niqs  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) 7=TF.TW)  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) v/68*,z[  
 ON_BN_CLICKED(ID_CHANGE, OnChange) q Gw -tPD<  
//}}AFX_MSG_MAP LcB]Xdsa(  
END_MESSAGE_MAP() {mZC$U'  
kI 4MiK  
BOOL CCaptureDlg::OnInitDialog() P@$/P99  
{ 8S mCpg  
 CDialog::OnInitDialog(); 9`I _Et  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); =BSzsH7  
 ASSERT(IDM_ABOUTBOX < 0xF000); <lw` 3aa(  
 CMenu* pSysMenu = GetSystemMenu(FALSE); #(#Wv?r6  
 if (pSysMenu != NULL) wkA+j9.  
 { trPAYa}W  
  CString strAboutMenu; Q[vJqkgT  
  strAboutMenu.LoadString(IDS_ABOUTBOX); ryW'Z{+r'  
  if (!strAboutMenu.IsEmpty()) \r /ya<5  
  { &x[E;P*Fg  
   pSysMenu->AppendMenu(MF_SEPARATOR); lef2X1w}!  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); AsAT_yv#  
  } !sDh4jQ`  
 } =vQcYa  
 SetIcon(m_hIcon, TRUE); // Set big icon !MYSfPdS  
 SetIcon(m_hIcon, FALSE); // Set small icon hAYTj0GZ  
 m_Key.SetCurSel(0); Rn`x7(WA  
 RegisterHotkey(); b$ve sJ  
 CMenu* pMenu=GetSystemMenu(FALSE); kbTm^y"  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); f,V<;s  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); @ezH'y-v  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); {QcLu"?c  
 return TRUE; // return TRUE unless you set the focus to a control gVq;m>\|F  
} QMa;Gy  
k. MUdU^  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) r=5{o 1"  
{ 5R'TcWf#W  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) NO|KVZ~  
 { iF-6Y0~8  
  CAboutDlg dlgAbout; u [m  
  dlgAbout.DoModal(); 8YZbP5'  
 } U=DmsnD,  
 else A )^`?m3  
 { GN ]cDik  
  CDialog::OnSysCommand(nID, lParam); T&%ux=Jt  
 } ^B(V4-|  
} [`{Z}q&  
WF1px%  
void CCaptureDlg::OnPaint() $FlW1E j  
{ Bg&i63XL$$  
 if (IsIconic()) c_-drS  
 { <KE 1f7c  
  CPaintDC dc(this); // device context for painting ;3d"wW]}7K  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); 5b!vgm#])  
  // Center icon in client rectangle B^j  
  int cxIcon = GetSystemMetrics(SM_CXICON); %MrWeYd1  
  int cyIcon = GetSystemMetrics(SM_CYICON); v@Gl|29_  
  CRect rect; zo+nq%=  
  GetClientRect(&rect); 2"Ecd  
  int x = (rect.Width() - cxIcon + 1) / 2; 19O,a#{KHf  
  int y = (rect.Height() - cyIcon + 1) / 2; gZLP\_CL  
  // Draw the icon IhA5Wt0j  
  dc.DrawIcon(x, y, m_hIcon); 12;8o<~  
 } 2_n7=&  
 else lz YEx  
 { :YXX8|>  
  CDialog::OnPaint(); AG!w4Ky`  
 } E=e*VEjy  
} e?7& M  
R_sr?V|"  
HCURSOR CCaptureDlg::OnQueryDragIcon() V,q](bg  
{ k"NVV$;  
 return (HCURSOR) m_hIcon; T(f/ ?_%  
} V}dJ.I /#  
5Yl <h)1  
void CCaptureDlg::OnCancel() AD1=[I3  
{ ep2k%?CX 1  
 if(bTray) x$1]M DAGb  
  DeleteIcon(); wQe_vY  
  CDialog::OnCancel(); ?YZ- P{rTS  
} I_<I&{N>  
-7S g62THS  
void CCaptureDlg::OnAbout() KVD8YfF  
{ U@-^C"R  
 CAboutDlg dlg; Zy o[(`y  
 dlg.DoModal(); R $&o*K`?  
} {5F-5YL+>  
KO]T<R h<  
void CCaptureDlg::OnBrowse() u/M+u;  
{ ;~"FLQg@  
 CString str; rd9e \%A  
 BROWSEINFO bi; '=Rs/EDME  
 char name[MAX_PATH]; ;j^H)."A\  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); dYL"h.x  
 bi.hwndOwner=GetSafeHwnd(); D'J 0wT#  
 bi.pszDisplayName=name; *g6n  
 bi.lpszTitle="Select folder"; nPye,"A Ol  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; | h;0H`  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); M7@2^G]p  
 if(idl==NULL) M+w=O!dq  
  return; 3+@<lVew6  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); mT.u0KUIy  
 str.ReleaseBuffer(); . koYHq  
 m_Path=str; y *fDwd~  
 if(str.GetAt(str.GetLength()-1)!='\\') ;*:Pw?'  
  m_Path+="\\"; X&7 F_#s  
 UpdateData(FALSE); FLGk?.x$\  
} eA#;AQm  
=5kY6%E7c  
void CCaptureDlg::SaveBmp() <})2#sZO!  
{ nv@8tdrc  
 CDC dc; X22[tqg;&  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); bT^I"  
 CBitmap bm; 0l-Ef 1  
 int Width=GetSystemMetrics(SM_CXSCREEN); @te!Jgu{  
 int Height=GetSystemMetrics(SM_CYSCREEN); Z@]e{zO  
 bm.CreateCompatibleBitmap(&dc,Width,Height); rvnT6Ve  
 CDC tdc; &(xH$htv1  
 tdc.CreateCompatibleDC(&dc); d` jjGEj  
 CBitmap*pOld=tdc.SelectObject(&bm); e> (<eu~P  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); NiU2@zgl  
 tdc.SelectObject(pOld); [Pq}p0cD  
 BITMAP btm;  Kfh|  
 bm.GetBitmap(&btm); wPwXM!  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; p2DrEId  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); Y#u}tE d  
 BITMAPINFOHEADER bih; QlO0qbG[y  
 bih.biBitCount=btm.bmBitsPixel; e^<#53!  
 bih.biClrImportant=0; h-Fn?  
 bih.biClrUsed=0;  B[Zjfc  
 bih.biCompression=0; XT@-$%u  
 bih.biHeight=btm.bmHeight; ,PWgH$+  
 bih.biPlanes=1; XgLL!5`  
 bih.biSize=sizeof(BITMAPINFOHEADER); oAPb*;}  
 bih.biSizeImage=size; /4` 0?/V  
 bih.biWidth=btm.bmWidth; n~A%q,DmF  
 bih.biXPelsPerMeter=0; 1e&QSzL  
 bih.biYPelsPerMeter=0; d*~ ICir7  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); %2XHNW  
 static int filecount=0; D"J!\_o  
 CString name; m6',SY9T  
 name.Format("pict%04d.bmp",filecount++); 11<KpxKpk  
 name=m_Path+name; ~:3QBMk::  
 BITMAPFILEHEADER bfh; ~ ; -! n;  
 bfh.bfReserved1=bfh.bfReserved2=0; HmiJ~C_v`:  
 bfh.bfType=((WORD)('M'<< 8)|'B'); q^r#F#*1l  
 bfh.bfSize=54+size; Yx eOI#L  
 bfh.bfOffBits=54; ub;ZtsM,%  
 CFile bf; ?)`L$Vr=  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ 2UFv9  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); [L:o`j  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); OU/MiyP2  
  bf.WriteHuge(lpData,size); %oq[,h <X  
  bf.Close(); .R9IL-3fO  
  nCount++; A@sZ14+f  
 } #1c_evH  
 GlobalFreePtr(lpData); _ B 5gR  
 if(nCount==1) A` AaTP  
  m_Number.Format("%d picture captured.",nCount); []A%<EI7  
 else OnK~3j  
  m_Number.Format("%d pictures captured.",nCount); x}Aw)QCh+r  
  UpdateData(FALSE); e(I =^#u6  
} ,;(PwJe  
-*m+(7G\  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) hb^7oq"a  
{ vh*U]3@  
 if(pMsg -> message == WM_KEYDOWN) IjR'Qou5  
 { R8T] 2?Q1  
  if(pMsg -> wParam == VK_ESCAPE) .F(i/)vaq|  
   return TRUE; |'{zri|A"  
  if(pMsg -> wParam == VK_RETURN) QNxl/y\l0  
   return TRUE; !ykx^z  
 } Vgyew9>E  
 return CDialog::PreTranslateMessage(pMsg); ijdXU8  
} !}r% u."  
HjGyj/78w  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) Hx\H $Y  
{ EoxQ */  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ 6'RrQc=q  
  SaveBmp(); v0ES;  
  return FALSE; CBD6bl|A  
} l+g9 5m jP  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ mBG=jI "xh  
 CMenu pop; ]<q[Do8k  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); T7d9ChU\#.  
 CMenu*pMenu=pop.GetSubMenu(0); !Wy[).ZAf  
 pMenu->SetDefaultItem(ID_EXITICON); I~9hx*!%%  
 CPoint pt; GKFq+]W  
 GetCursorPos(&pt); )h8\u_U  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); \0H's{uek  
 if(id==ID_EXITICON) k!KDWb  
  DeleteIcon(); _+^ 2^TW  
 else if(id==ID_EXIT) wj1{M.EF\  
  OnCancel(); Xj5~%DZp  
 return FALSE; sqS=qC  
} zBP>jM(8  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); n]u<!.X  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) %T[^D&9$,  
 AddIcon(); 9Y<#=C  
 return res; `)Z!V?&!  
} RJON90,J  
G_dsrpI=N  
void CCaptureDlg::AddIcon() w1|A5q'M  
{ ;9}pOzF1q  
 NOTIFYICONDATA data; C^z\([k0er  
 data.cbSize=sizeof(NOTIFYICONDATA); &V<W>Y>|l*  
 CString tip; Y2[A2Uy$ef  
 tip.LoadString(IDS_ICONTIP); )#}mH@  
 data.hIcon=GetIcon(0); KPpHwcYxT  
 data.hWnd=GetSafeHwnd(); G5,~Z&}YS  
 strcpy(data.szTip,tip); $L2%u8}8:  
 data.uCallbackMessage=IDM_SHELL; nxJee=qH  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; o8Z[+;  
 data.uID=98; B=@ jWz"  
 Shell_NotifyIcon(NIM_ADD,&data); bLnrbid  
 ShowWindow(SW_HIDE); ;kJu$U  
 bTray=TRUE; 2Gs$?}"a  
} hG_?8:W8HT  
gn{=%`[  
void CCaptureDlg::DeleteIcon() \G2B?>E;  
{ D>!6,m2  
 NOTIFYICONDATA data; SgEBh  
 data.cbSize=sizeof(NOTIFYICONDATA); Fbp{,V@F2  
 data.hWnd=GetSafeHwnd(); 62>zt2=  
 data.uID=98; P\&! ]  
 Shell_NotifyIcon(NIM_DELETE,&data); KHDZ  
 ShowWindow(SW_SHOW); a@pz*e  
 SetForegroundWindow(); )kJH5/  
 ShowWindow(SW_SHOWNORMAL); 0'r%,0  
 bTray=FALSE; OGrBUP  
} `:eViVl6e  
,JEbd1Uf  
void CCaptureDlg::OnChange() >z`,ch6~  
{ 34QfgMyH  
 RegisterHotkey(); 1[*{(e  
} P &)1Rka  
4"vaMa  
BOOL CCaptureDlg::RegisterHotkey() /V?H4z[G  
{ sIl33kmv  
 UpdateData(); TFepxF  
 UCHAR mask=0; =q"eU=9  
 UCHAR key=0; %ObD2)s6:^  
 if(m_bControl) yxBUj*3  
  mask|=4; 1KYN>s:  
 if(m_bAlt) &-1./?  
  mask|=2; XTDE53Js&  
 if(m_bShift) 'lS `s(  
  mask|=1; - /c7n F  
  key=Key_Table[m_Key.GetCurSel()]; b59{)u4F  
 if(bRegistered){ 3qQUpm+  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); = zl= SLe  
  bRegistered=FALSE; {$M;H+Foh  
 } )n=ARDd^e  
 cMask=mask; ?_`0G/xl  
 cKey=key; &)pK%SAM  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); jFerYv&K~  
 return bRegistered; `Vq`z]}  
} o/,NGU  
zEw >SP1,  
  四、小结 +/?iCmW  
:ZxLJK9x1  
  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
如果您在写长篇帖子又不马上发表,建议存为草稿
认证码:
验证问题:
3+5=?,请输入中文答案:八 正确答案:八