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
  • 5681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: *c<=IcA  
  [=dK%7v  
  一、实现方法 WEgJ_dB  
&jJj6 +P\  
  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: $j? zEz  
~gz_4gzb  
#pragma data_seg("shareddata") >OP[ qj  
HHOOK hHook =NULL; //钩子句柄 0[(TrIpXl  
UINT nHookCount =0; //挂接的程序数目 N#(p_7M  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 ?7 Kl)p3  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 I"TFj$Pg  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey F Xbf7G)H  
static int KeyCount =0; F@</Ev  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 .EJo 9s'  
#pragma data_seg() Jw;Tq"&  
WCc7 MK  
  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。 1D3{\v  
wxy. &a]  
  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: pY75S5h:  
Gt >*y.]  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR y8j wfO3  
cKey,UCHAR cMask) >K<n~;ON|  
{ a o"\L0;{  
 BOOL bAdded=FALSE; UVND1XV^f  
 for(int index=0;index<MAX_KEY;index++){ @w?y;W!a>  
  if(hCallWnd[index]==0){ 8_yhV{  
   hCallWnd[index]=hWnd; \]bAXa{ p  
   HotKey[index]=cKey; /_yJ;l/K  
   HotKeyMask[index]=cMask; :Fe}.* t  
   bAdded=TRUE; ces|HPBa&6  
   KeyCount++; OsQB` D  
   break; X@:[.eI~  
  }  R d|#-7  
 } KmUH([#  
 return bAdded; 6|h~pH  
} 46 p%y  
//删除热键 &-l(nr]h]  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) ;3~+M:{2  
{ re\pE2&B  
 BOOL bRemoved=FALSE; IrIF 853g  
 for(int index=0;index<MAX_KEY;index++){ ,OGXH2!h  
  if(hCallWnd[index]==hWnd){ uvbXsO"z]]  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ ,E YB E  
    hCallWnd[index]=NULL; FVi7gg.?  
    HotKey[index]=0; Pra,r9h,  
    HotKeyMask[index]=0; {,kA'Px)  
    bRemoved=TRUE; )#|I(Gz ^  
    KeyCount--; NR </Jm*  
    break;  D`Tx,^E  
   } ~yrEB:w`_  
  } Cp[{| U-?G  
 } xA?(n!{P  
 return bRemoved; ((Jiv=%  
} >m66j2(H*Z  
H Pvs~`>V  
y+R *<5qC<  
  DLL中的钩子函数如下: jv<C#0E^  
"9>.,nzt  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) El9D1],  
{  ' ];|  
 BOOL bProcessed=FALSE; _VvXE572  
 if(HC_ACTION==nCode) 0m`{m'B4n  
 { =Fu~ 0Wc  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 @fjVCc;  
   switch(wParam) 'aLTiF+  
   {  k;)t}7(  
    case VK_MENU: $7\!  
     MaskBits&=~ALTBIT; g#??Mz   
     break; .=I:cniw\r  
    case VK_CONTROL: ^seb8o7  
     MaskBits&=~CTRLBIT; OhNEt>  
     break; OE{PP9 eh  
    case VK_SHIFT: ;|a,1#x  
     MaskBits&=~SHIFTBIT; `Z)]mH\X  
     break; ,lsoxl  
    default: //judge the key and send message /*$B  
     break; oM<Y o%n  
   } )p?p39>h  
   for(int index=0;index<MAX_KEY;index++){ e\Igc.  
    if(hCallWnd[index]==NULL) LBCat=d<  
     continue; *_Sx^`"X`l  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) Z+3j>_Ss  
    { vv 7T/C  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); ZKk*2EK]2z  
     bProcessed=TRUE; ysHmi{V~  
    } #YEOY#  
   } uaiCyh1:  
  } f&ZFG>)6  
  else if((lParam&0xc000ffff)==1){ //有键按下 ~a5-xWEZ  
   switch(wParam) F4o)6+YM   
   { z8 n=\xL  
    case VK_MENU: A7eF.V&  
     MaskBits|=ALTBIT; szZ8-Y  
     break; Ei$@)qS/  
    case VK_CONTROL: 7BNu.5*y  
     MaskBits|=CTRLBIT; Vm_<eyI2  
     break; ` D9sEt_/  
    case VK_SHIFT: n"Gow/-;  
     MaskBits|=SHIFTBIT; {Xj2c]A1  
     break; iUH{rh!  
    default: //judge the key and send message FF}A_ZFY  
     break; j 1Ng[  
   } \H6[6*JuB  
   for(int index=0;index<MAX_KEY;index++){ CLn}BxgD  
    if(hCallWnd[index]==NULL) udld[f.  
     continue; px7<;(I  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) 4fuK pLA  
    { <"}Gvi  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); Iz^lED  
     bProcessed=TRUE; |^&j'k+A  
    } qhIO7h  
   } 2A,iY}R  
  } 4Iq-4IG(  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 ytsPk2@WR  
   for(int index=0;index<MAX_KEY;index++){ 7K.in3M(  
    if(hCallWnd[index]==NULL) !+F6Bf  
     continue; ` 6'dhB  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) 0P%,1M3d  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); |o5F%1o  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 0Na/3cz|zg  
   } 3lW7auH4Y{  
  } 8`$lsD  
 } [WAnII  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); jf|5}5kSlf  
} r/G6O  
kN'.e*  
  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: KcW]"K>p!  
bAd$ >DI[  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask);  Ie<`WU K  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); p%?VW  
/&T"w,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: ophQdJM  
gPA), NrN  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) rNl` w.  
{ 83|7#L  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) p1mY@  
 { @ff83Bg  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 vT&xM  
  SaveBmp(); c!2j+ORz  
  return FALSE; 'TdO6-X  
 } k`u:Cz#aB  
 …… //其它处理及默认处理 X (0`"rjg  
} L{i,.aE/nO  
=ghN)[AZV  
*pOdM0AE  
  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。 .=u8`,sO  
sC^9  
  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。 jQ 'r};;  
>U2[]fu  
  二、编程步骤 :VB{@ED  
<h vVh9  
  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"; a2vZ'  
U> @st="  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; h M/:zC:  
%^){)#6w  
  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; Js'#=  
>bo_  
  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; XoO#{7a  
"T?hIX/p _  
  5、 添加代码,编译运行程序。 r^2>60q'  
qa!3lb_'M  
三、程序代码 cc %m0p  
`62iW3y  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL ~|>q)4is6a  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) ": G\  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ 'Drz6K_KrP  
#if _MSC_VER > 1000 wQnW2)9!  
#pragma once LKx<hl$O  
#endif // _MSC_VER > 1000 SD=kpf;  
#ifndef __AFXWIN_H__ "'8^OZR  
#error include 'stdafx.h' before including this file for PCH o/6 'g)r*  
#endif hh$V[/iK  
#include "resource.h" // main symbols i!U,qV1  
class CHookApp : public CWinApp W-ctx"9DS  
{ ux 7^PTgcO  
 public: Te:4 z@?  
  CHookApp(); ;hcOD4or  
  // Overrides uv}?8$<\  
  // ClassWizard generated virtual function overrides 10C,\  
  //{{AFX_VIRTUAL(CHookApp) }0%~x,  
 public:  oRbG6Vv/  
  virtual BOOL InitInstance(); m&36$>r=  
  virtual int ExitInstance(); s>VpbJ3S  
  //}}AFX_VIRTUAL oU`J~6.&S  
  //{{AFX_MSG(CHookApp) l^ Q-KUI  
  // NOTE - the ClassWizard will add and remove member functions here. (C=.&',P  
  // DO NOT EDIT what you see in these blocks of generated code ! /Mg$t6vM  
  //}}AFX_MSG h\@\*Xz<v  
  DECLARE_MESSAGE_MAP() /%P|<[< [  
}; x_yQoae  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); $^ wqoW%t  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); "G+g(?N]j  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); wVw?UN*rm;  
BOOL InitHotkey(); F"?OLV1B&  
BOOL UnInit(); @S%ogZz*m  
#endif ZjEc\{ s  
nB#m?hK  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. :|P[u+v  
#include "stdafx.h" x)h|!T=B~  
#include "hook.h" :zW I"  
#include <windowsx.h> m,TN%*U!  
#ifdef _DEBUG $}*bZ~  
#define new DEBUG_NEW Hfw*\=p  
#undef THIS_FILE Ac'0  
static char THIS_FILE[] = __FILE__; e{*-_j "I  
#endif =gYKAr^p5  
#define MAX_KEY 100 1F*3K3T {  
#define CTRLBIT 0x04 cKbjW  
#define ALTBIT 0x02 X/8CvY#n  
#define SHIFTBIT 0x01 oQ=v:P]  
#pragma data_seg("shareddata") _$oN"pj  
HHOOK hHook =NULL; ."u-5r<O  
UINT nHookCount =0; {4%B^+}T  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey VXM5 B  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT )rqb<O  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey bu j}pEI  
static int KeyCount =0; 9MI~yIt`L  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift M`~UH\  
#pragma data_seg() g<@P_^vo  
HINSTANCE hins; zHEH?xZ6sD  
void VerifyWindow(); [lmghI!  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) LxcC5/@\~(  
//{{AFX_MSG_MAP(CHookApp) VD,p<u{r  
// NOTE - the ClassWizard will add and remove mapping macros here. PGE|){ <  
// DO NOT EDIT what you see in these blocks of generated code! #2XX[d%  
//}}AFX_MSG_MAP %O=U|tuc$  
END_MESSAGE_MAP() .o._`"V  
2EU((Q`>=(  
CHookApp::CHookApp() 6w )mo)<X  
{ D #`o  
 // TODO: add construction code here, lHTW e'  
 // Place all significant initialization in InitInstance Pa8E.<>  
} 8`0/?MZ)   
rQuozbBb  
CHookApp theApp; a___SYl 'K  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) \fk%^1XY  
{ 91Fx0(  
 BOOL bProcessed=FALSE; 6 G^x%s  
 if(HC_ACTION==nCode) Rfk8trD B  
 { O>h,u[0  
  if((lParam&0xc0000000)==0xc0000000){// Key up 3[RP:W@%  
   switch(wParam) 8c6dTT4  
   { qir/Sa' [  
    case VK_MENU: s"7$SxMT  
     MaskBits&=~ALTBIT; OrZ=-9"  
     break; \$iU#Z  
    case VK_CONTROL: _~{Nco7T  
     MaskBits&=~CTRLBIT; h W<fu  
     break; d"P\ =`+  
    case VK_SHIFT: gq'}LcV  
     MaskBits&=~SHIFTBIT; 8 BHtN  
     break; 24}?GO  
    default: //judge the key and send message Y%i=u:}fm  
     break; Dm")\"5\?  
   } &J <km  
   for(int index=0;index<MAX_KEY;index++){ T[z}^"  
    if(hCallWnd[index]==NULL) iK(G t6w  
     continue; /F(wb_!  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) s%{8$> 8V.  
    { n)n>|w_  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); ib3 u:  
     bProcessed=TRUE; BkH- d z  
    } o)(N*tC  
   } ,D6hJ_:  
  } @AvDV$F  
  else if((lParam&0xc000ffff)==1){ //Key down Zgw;AY.R>  
   switch(wParam) cEP!DUo  
   { u(Y! _  
    case VK_MENU: sW53g$`v  
     MaskBits|=ALTBIT; H(JgqbFB*  
     break; &gNb+z+  
    case VK_CONTROL: d-W@/J  
     MaskBits|=CTRLBIT; T;4& ^5 n  
     break; i>]1E^yF  
    case VK_SHIFT: ~)Z MGx  
     MaskBits|=SHIFTBIT; iEA$`LhO\A  
     break; ,vxxp]#5  
    default: //judge the key and send message  [YGPcGw  
     break; Y`O"+Jr  
   } fku\O<1  
   for(int index=0;index<MAX_KEY;index++) X J+y5at  
   { pBd_Ba N  
    if(hCallWnd[index]==NULL) /|kR= ~  
     continue; \A{ [2  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) 6;O fh   
    { c Nhy.Z~D  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); P ,%IZ.  
     bProcessed=TRUE; \o&\r)FX  
    } c7E|GZ2Hc  
   } sULCYiT|Hn  
  } :jJ;&t^^  
  if(!bProcessed){ #[Z1W8e  
   for(int index=0;index<MAX_KEY;index++){ k2"DFXsv  
    if(hCallWnd[index]==NULL) CJDnHuozc  
     continue; !4"!PrZDB  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) S\,~6]^T  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); 0ESxsba  
   } e%Sw(=a  
  } Q)n6.%V/e  
 } P0Q]Ds|  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); JlM0]__v  
} .nN>Ipv  
^ B>BA  
BOOL InitHotkey() 4TP AD)C  
{ e[Tu.$f-  
 if(hHook!=NULL){ lj U|9|v  
  nHookCount++; W N5`zD$  
  return TRUE; b3h3$kIYN  
 } E`"<t:RzF  
 else c}QWa"\2n  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); lBYc(cr  
  if(hHook!=NULL) hS( )OY  
   nHookCount++; H}nPaw]G  
  return (hHook!=NULL); csEF^T-  
} &D/@H1fBe  
BOOL UnInit() }o'WR'LX  
{ ]12ypcf  
 if(nHookCount>1){ xT]|78h$   
  nHookCount--; Pl>BTo>p'  
  return TRUE; dN8@ 0AMSf  
 } LU=<? "N6  
 BOOL unhooked = UnhookWindowsHookEx(hHook); 2 SJ N;A~}  
 if(unhooked==TRUE){ c,v?2*<  
  nHookCount=0; V5.=08L  
  hHook=NULL; 2;v1YKY  
 } + YjK#  
 return unhooked; ;cFlZGw   
} fMRv:kNAt  
C:?mOM#_  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) [110[i^  
{ /OX;3" +1  
 BOOL bAdded=FALSE; vC# *w,  
 for(int index=0;index<MAX_KEY;index++){ PsV1btq]  
  if(hCallWnd[index]==0){ gsSUmf1  
   hCallWnd[index]=hWnd; 1-h"1UN2E  
   HotKey[index]=cKey; e[>c>F^  
   HotKeyMask[index]=cMask; Y`U[Y Hx  
   bAdded=TRUE; 6JCq?:#ab  
   KeyCount++; %6%QE'D  
   break; y3,'1^lA  
  } q2 pq~LI  
 } 0m,3''Q5lO  
 return bAdded; RRasX;zK  
} mPmg6Qj(W  
S260h,(,  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) ;RElG>#$  
{ Wv4x^nJ  
 BOOL bRemoved=FALSE; ]ZbZ]  
 for(int index=0;index<MAX_KEY;index++){ .8v[ss6:  
  if(hCallWnd[index]==hWnd){ iE}Lw&x  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ fH> I/%  
    hCallWnd[index]=NULL; jNC@b>E?~  
    HotKey[index]=0; %mO.ur>21  
    HotKeyMask[index]=0; v J_1VW  
    bRemoved=TRUE; =B/Ac0Y  
    KeyCount--; )R- e^Cb  
    break; ) ]y^RrD  
   } L] syD n  
  } 8F;r$i2  
 } %xJ6t 5.-  
 return bRemoved; gdx2&~  
} GY~Q) Z  
Wf}x"*  
void VerifyWindow() FEF $4)ROv  
{ T1([P!g*  
 for(int i=0;i<MAX_KEY;i++){ bMrR  
  if(hCallWnd!=NULL){ pO10L`|  
   if(!IsWindow(hCallWnd)){ d~>d\K%v  
    hCallWnd=NULL; ,WA[HwY-  
    HotKey=0; H[u[3  
    HotKeyMask=0; WlF}R\N!  
    KeyCount--; T\ cJn>kCn  
   } -!ARVf *  
  } Q&@~<!t  
 } PlX6,3F  
} Wifr%&t{J  
 g%.;ZlK  
BOOL CHookApp::InitInstance() egd%,`  
{ PdkS3Hz  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); iVQ)hs W/  
 hins=AfxGetInstanceHandle(); 0o>l+c  
 InitHotkey(); G|LJOq7QB  
 return CWinApp::InitInstance(); hk7kg/"  
} s4&JBm(33N  
U.kTdNSp  
int CHookApp::ExitInstance() gE}+`w/X  
{ `nvm>u~[Hq  
 VerifyWindow(); Xh[02iL-  
 UnInit(); 7R{(\s\9:  
 return CWinApp::ExitInstance(); ($vaj;  
} Or2J  
Ibbpy++d[  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file Z7G l^4zn  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) 7/UdE:~]*=  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ Yqz B="  
#if _MSC_VER > 1000 #% 1|$V*:  
#pragma once /ll2lyS+  
#endif // _MSC_VER > 1000 FL/395 <:  
,5 ylrE  
class CCaptureDlg : public CDialog Tg-HR8}X  
{ ^gu;  
 // Construction PAcbC| y  
 public: Di^7@}kQS  
  BOOL bTray; H*H=a  
  BOOL bRegistered; _-mJI+^/  
  BOOL RegisterHotkey(); ]CnqPLqL  
  UCHAR cKey; -:P`Rln  
  UCHAR cMask; E979qKl  
  void DeleteIcon(); $YPQi.  
  void AddIcon(); c1 ~=   
  UINT nCount; <:YD.zAh|  
  void SaveBmp(); YZHqy++x  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor fN-y8  
  // Dialog Data XVRtfo  
  //{{AFX_DATA(CCaptureDlg) V1 :aR3*!  
  enum { IDD = IDD_CAPTURE_DIALOG }; .zMM!l3  
  CComboBox m_Key; _ITA$ #  
  BOOL m_bControl; 9si,z  
  BOOL m_bAlt; mKh <M)Bz  
  BOOL m_bShift; F VVpyB|  
  CString m_Path; %(v<aEQtt  
  CString m_Number; l}aJRG6U  
  //}}AFX_DATA re%MT@L#  
  // ClassWizard generated virtual function overrides 4or8fG  
  //{{AFX_VIRTUAL(CCaptureDlg) .%3qzOrN  
 public: OZc.Rtgc  
  virtual BOOL PreTranslateMessage(MSG* pMsg); [h=[@jiB  
 protected: Q*c |!< &e  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support  M .J  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); .o_?n.H'&  
  //}}AFX_VIRTUAL /`x)B(b  
  // Implementation sO;]l"{<  
 protected: }8\"oA6  
  HICON m_hIcon; =JK# "'  
  // Generated message map functions |TE\]  
  //{{AFX_MSG(CCaptureDlg) 6Y-sc*5  
  virtual BOOL OnInitDialog(); SaA9)s  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); LqOjVQxz  
  afx_msg void OnPaint(); rjJ-ZRs\  
  afx_msg HCURSOR OnQueryDragIcon(); <zdo%~ba  
  virtual void OnCancel(); P?Fm<s:  
  afx_msg void OnAbout(); s(3iGuT  
  afx_msg void OnBrowse(); /EXub U73  
  afx_msg void OnChange(); {W5D)  
 //}}AFX_MSG l*0`{R  
 DECLARE_MESSAGE_MAP() A>OGU ^  
}; %J 'RO  
#endif CNRiK;nQ  
[ ]LiL;A&  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file "p[FFg  
#include "stdafx.h" VJ'bS9/T  
#include "Capture.h" N:yyDeGyW  
#include "CaptureDlg.h" 9tZ+ ?O5  
#include <windowsx.h> 5%Xny8 ]|D  
#pragma comment(lib,"hook.lib") (qky&}H  
#ifdef _DEBUG ;[[GA0  
#define new DEBUG_NEW (9X>E+0E  
#undef THIS_FILE `;OEdeAM  
static char THIS_FILE[] = __FILE__; _hy<11S;  
#endif ~ ""?:  
#define IDM_SHELL WM_USER+1 r:n-?P  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); Hswgv$n  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); 9" RGf 1]  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; Jc74A=sT  
class CAboutDlg : public CDialog ?4 &C)[^  
{ 1MF0HiC  
 public: g12mSbf=9  
  CAboutDlg(); hV6=-QL*B  
  // Dialog Data ^9zFAY.|  
  //{{AFX_DATA(CAboutDlg) wzka4J{  
  enum { IDD = IDD_ABOUTBOX }; F]"Hs>  
  //}}AFX_DATA k.d Q;v}  
  // ClassWizard generated virtual function overrides Ue8k9%qV  
  //{{AFX_VIRTUAL(CAboutDlg) A` iZ"?  
 protected: {q}#  Sq  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support ji(Y?vhQt  
  //}}AFX_VIRTUAL w&E*{{otJ  
  // Implementation oB8x_0#n  
 protected: V,W":&!x  
  //{{AFX_MSG(CAboutDlg) B,]:<1l~  
  //}}AFX_MSG a!!>}e>Cj*  
  DECLARE_MESSAGE_MAP() B2uLfi$q  
}; '+Gy)@c  
#P''+$5,  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) |k-IY]6  
{ :d5f U:  
 //{{AFX_DATA_INIT(CAboutDlg) ]F]!>dKA  
 //}}AFX_DATA_INIT |,G=k,?_p  
} E+.%9EKU  
6}>:sr  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) !_|rVg.  
{ k\J 6WT  
 CDialog::DoDataExchange(pDX); 9j6  
 //{{AFX_DATA_MAP(CAboutDlg) wB0zFlP  
 //}}AFX_DATA_MAP .vbUv3NI  
} p 7YfOUo k  
5 1\N+  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) Gw;[maM!%`  
 //{{AFX_MSG_MAP(CAboutDlg) Q6r!=yOEY  
 // No message handlers OGjeE4  
 //}}AFX_MSG_MAP Q;3 v ]h_  
END_MESSAGE_MAP() 4GY:N6qe '  
D}| 30s?u1  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) [9O,C-Mk  
: CDialog(CCaptureDlg::IDD, pParent) I'NE>!=Q  
{ ;~>E^0M  
 //{{AFX_DATA_INIT(CCaptureDlg) 96&Y  
  m_bControl = FALSE; i7m=V T  
  m_bAlt = FALSE; R4R SXV  
  m_bShift = FALSE; VgSk\:t  
  m_Path = _T("c:\\"); vX'@we7Q{  
  m_Number = _T("0 picture captured."); 8#S}.|"?F  
  nCount=0; pNHO;N[&  
  bRegistered=FALSE; >^  E  
  bTray=FALSE; kr_!AW<.tz  
 //}}AFX_DATA_INIT njk1x  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 i~k9s  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); N` DLIv8i;  
} eqL~h1^Co  
N9M''H *VS  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) l9 |x7GB  
{ XgfaTX*  
 CDialog::DoDataExchange(pDX); O;ty k_yM  
 //{{AFX_DATA_MAP(CCaptureDlg) ^rDT+ x  
  DDX_Control(pDX, IDC_KEY, m_Key); rX*ATN  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); M99gDN  
  DDX_Check(pDX, IDC_ALT, m_bAlt); PKx ewd  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); 0> 6;,pd"  
  DDX_Text(pDX, IDC_PATH, m_Path); 3gn) q>Xj$  
  DDX_Text(pDX, IDC_NUMBER, m_Number); gyI(O>e  
 //}}AFX_DATA_MAP B3P#p^  
} LE|*Je3a  
&dino  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) :LuzKCvBP  
//{{AFX_MSG_MAP(CCaptureDlg) Pw"o[8  
 ON_WM_SYSCOMMAND() #0hX'8];(  
 ON_WM_PAINT() nVTCbV  
 ON_WM_QUERYDRAGICON() kJJUu  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) n>w/T"  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) r*'X]q|L+  
 ON_BN_CLICKED(ID_CHANGE, OnChange) 6G<t1?_yD  
//}}AFX_MSG_MAP xF+a.gAIb  
END_MESSAGE_MAP() ;Ly(O'9  
Ef1R?<  
BOOL CCaptureDlg::OnInitDialog() g* NKY`,  
{ buXPeIo^VM  
 CDialog::OnInitDialog(); r/![ohrEB  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); NjCdkT&g  
 ASSERT(IDM_ABOUTBOX < 0xF000); cdDMV%V  
 CMenu* pSysMenu = GetSystemMenu(FALSE); #>|l"1   
 if (pSysMenu != NULL) WJ{hta  
 { U[ $KQEJYj  
  CString strAboutMenu; x=>+.'K  
  strAboutMenu.LoadString(IDS_ABOUTBOX); ">n38:?R  
  if (!strAboutMenu.IsEmpty()) [U]ouh)  
  { nC3U%*l  
   pSysMenu->AppendMenu(MF_SEPARATOR); 7H-,:8  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); P~)ndaQ  
  } <&?gpRK   
 } Y}bJN%M  
 SetIcon(m_hIcon, TRUE); // Set big icon RsYn6ozb  
 SetIcon(m_hIcon, FALSE); // Set small icon +7jr]kP9  
 m_Key.SetCurSel(0); PC| U]  
 RegisterHotkey(); +P7A`{Ae  
 CMenu* pMenu=GetSystemMenu(FALSE); T41&;?-  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); ]to"X7/  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); m\h/D7zg  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); xb!h?F&  
 return TRUE; // return TRUE unless you set the focus to a control (O N \-*  
} <bwsK,C  
? [?{X~uq  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) yn0OPjH  
{ \}ujSr#<  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) wo>srZs  
 { EBY=ccGE{  
  CAboutDlg dlgAbout; !OJ@ =y`i  
  dlgAbout.DoModal(); 6 1= ?(Iw  
 } 3gW4\2|T  
 else K)Nbl^6x  
 { o b  
  CDialog::OnSysCommand(nID, lParam); v5|X=B>&>  
 } y@;4F n/  
} ,KlTitJl\+  
|5wuYG  
void CCaptureDlg::OnPaint() 1Ftl1uf  
{ c3gy{:lb  
 if (IsIconic()) M-!eL<  
 { 8t$a8 PE  
  CPaintDC dc(this); // device context for painting aW8Bx\q  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); ?-g=Rfpag  
  // Center icon in client rectangle ^|6%~jkD5  
  int cxIcon = GetSystemMetrics(SM_CXICON); ZhKYoPIq  
  int cyIcon = GetSystemMetrics(SM_CYICON); rsP3?.E  
  CRect rect; }b+tD3+  
  GetClientRect(&rect); {4Q4aL(  
  int x = (rect.Width() - cxIcon + 1) / 2; v/]Bo[a  
  int y = (rect.Height() - cyIcon + 1) / 2; rl^_RI  
  // Draw the icon XelY?Ph,,  
  dc.DrawIcon(x, y, m_hIcon); -{>Nrx|  
 } q/,W'lQ\;  
 else p6(n\egR  
 { %Ke:%##Y  
  CDialog::OnPaint(); "HW~|M7>(  
 } pa&*n=&cL  
} Aa;R_Jz  
D-.XSIEMu  
HCURSOR CCaptureDlg::OnQueryDragIcon() q P@4KH} e  
{ DJeP]  
 return (HCURSOR) m_hIcon; oJK]oVX9i  
} 5=g{%X  
G3P3  
void CCaptureDlg::OnCancel() =6t)-53  
{ <lM]c  
 if(bTray) 3LZ0EYVL  
  DeleteIcon(); @]Ye36v0#L  
  CDialog::OnCancel(); hu-fwBK  
} byM/LE7)  
\oPW  
void CCaptureDlg::OnAbout() s> JmLtT  
{ [{_JO+)+n  
 CAboutDlg dlg; [3s,U4a  
 dlg.DoModal(); ZD1UMB0$4  
} g2 uc+p  
x%ZjGDFm  
void CCaptureDlg::OnBrowse() "sz)~Q'W5  
{ 8#S|j BV  
 CString str; VrhG=CK  
 BROWSEINFO bi; lY_E=K]  
 char name[MAX_PATH]; TuphCu+Oh  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); 4YkH;!M>ji  
 bi.hwndOwner=GetSafeHwnd(); {4&G\2<^^  
 bi.pszDisplayName=name; `gy]|gS#b  
 bi.lpszTitle="Select folder"; -p`hevRr  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; KcVCA    
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); w,]cFT  
 if(idl==NULL) y";{k+  
  return; pi? q<p%  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); 8^;[c  
 str.ReleaseBuffer(); )`Tny]M  
 m_Path=str; .:c^G[CQ^9  
 if(str.GetAt(str.GetLength()-1)!='\\') 7|3Z+#|T  
  m_Path+="\\"; ):eX*  
 UpdateData(FALSE); *&>1A A  
} .O'S@ %]  
)cB00*/  
void CCaptureDlg::SaveBmp() E/:<9xl  
{ ?gjM]Ki%:  
 CDC dc; _ Onsfv  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); zt!mx{l'  
 CBitmap bm; 7ZS 5u+o  
 int Width=GetSystemMetrics(SM_CXSCREEN); yowvq4e  
 int Height=GetSystemMetrics(SM_CYSCREEN); {<&I4V@+  
 bm.CreateCompatibleBitmap(&dc,Width,Height); zl46E~"]x  
 CDC tdc; 5bGV91  
 tdc.CreateCompatibleDC(&dc); \uQB%yMoz  
 CBitmap*pOld=tdc.SelectObject(&bm); @! ^c@  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); B[ooT3V  
 tdc.SelectObject(pOld); 2|(J<H  
 BITMAP btm; BBnbXhxZ  
 bm.GetBitmap(&btm); \?h +  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; #B|`F?o  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); 7Q} P}9n  
 BITMAPINFOHEADER bih; 0)-l9V  
 bih.biBitCount=btm.bmBitsPixel;  =w0Rq~  
 bih.biClrImportant=0; K 4I ?1  
 bih.biClrUsed=0; a3ve%b  
 bih.biCompression=0; dx}()i\@  
 bih.biHeight=btm.bmHeight; l%.3hId-  
 bih.biPlanes=1; ):jK sP ,  
 bih.biSize=sizeof(BITMAPINFOHEADER); ,ju1:`  
 bih.biSizeImage=size; pq+Gsu1^  
 bih.biWidth=btm.bmWidth; 3D +>NB  
 bih.biXPelsPerMeter=0; ,\4@Ao  
 bih.biYPelsPerMeter=0; #Qc[W +%  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); V:)k@W?P  
 static int filecount=0; lQ!ukl)  
 CString name; %Y:'5\^lC  
 name.Format("pict%04d.bmp",filecount++); >Be PE(k  
 name=m_Path+name; <^|8\<J  
 BITMAPFILEHEADER bfh; [oKc<o7)~"  
 bfh.bfReserved1=bfh.bfReserved2=0; k uU,7 <o  
 bfh.bfType=((WORD)('M'<< 8)|'B'); ,d<wEB?\`  
 bfh.bfSize=54+size; SoS[yr  
 bfh.bfOffBits=54; Wk$[;>NU3  
 CFile bf; cIK-VmO  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ qbu Lcy3  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); C0z E<fl  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); 1$?O5.X:  
  bf.WriteHuge(lpData,size); ='T<jV`evu  
  bf.Close(); i*..]!7e  
  nCount++; 'g^;_=^G  
 } 9 Bz ~3  
 GlobalFreePtr(lpData); M' "S:  
 if(nCount==1) ueZ`+g~gg  
  m_Number.Format("%d picture captured.",nCount); 0!o&=Qh  
 else L{N9h1]  
  m_Number.Format("%d pictures captured.",nCount); o~<37J3).  
  UpdateData(FALSE); 0XSZ3dY&+  
} ;n00kel$  
[{ K$sd  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) F=Z|Ji#  
{ ?Q="w5OOD  
 if(pMsg -> message == WM_KEYDOWN) 8<Asg2]6  
 { -uqJ~gD  
  if(pMsg -> wParam == VK_ESCAPE) Hwklk9U  
   return TRUE; POfvs]  
  if(pMsg -> wParam == VK_RETURN) ;gTdiwfgZ=  
   return TRUE; <tMiI)0%  
 } sKB])mf]  
 return CDialog::PreTranslateMessage(pMsg); |L.QIr,jCC  
} `Q<hL{AH  
2TmQaDu%b  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) {jcrTjmxe  
{ [mJc c  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ aN}yS=(Ff  
  SaveBmp(); M'$n".,p  
  return FALSE; WM*[+8h  
} |0ACapp!  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ c>:}~.~T  
 CMenu pop; 1,T8@8#  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); Eh#W*Bg  
 CMenu*pMenu=pop.GetSubMenu(0); !F/;WjHz  
 pMenu->SetDefaultItem(ID_EXITICON); qm4 Ejc<  
 CPoint pt; =S4_^UY;  
 GetCursorPos(&pt); ",(-AU!a)h  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); z^gf@r  
 if(id==ID_EXITICON)  [53rSr  
  DeleteIcon(); 1mwb&j24n3  
 else if(id==ID_EXIT) I{ ;s.2  
  OnCancel(); q62TYg}  
 return FALSE; 8h=H\v^f  
} *$Aneq0f  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); `S2YBKz,1  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) UaiDo"i  
 AddIcon(); qtnLQl"M  
 return res; QK&<im-  
} 7C9qkQ Jqn  
'=G4R{  
void CCaptureDlg::AddIcon() )3=oS1p  
{ xqmP/1=NO  
 NOTIFYICONDATA data; Xnt`7L<L  
 data.cbSize=sizeof(NOTIFYICONDATA); zq80}5%2CT  
 CString tip; RvZi%)  
 tip.LoadString(IDS_ICONTIP); 7h<B:~(K  
 data.hIcon=GetIcon(0); b&"=W9(V  
 data.hWnd=GetSafeHwnd(); BLgmF E2  
 strcpy(data.szTip,tip); Y 6K<e:Y  
 data.uCallbackMessage=IDM_SHELL; cAM1\3HWT"  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; 'M=(5p  
 data.uID=98; w[I%Id;E  
 Shell_NotifyIcon(NIM_ADD,&data); 8|.( Y  
 ShowWindow(SW_HIDE); HB\<nK  
 bTray=TRUE; (^ZC8)0i(  
} aAh")B2  
c|X.&<lX  
void CCaptureDlg::DeleteIcon() q@~N?$>  
{ -A(] ",*J  
 NOTIFYICONDATA data; 1 9$ufod  
 data.cbSize=sizeof(NOTIFYICONDATA); puG$\D-[  
 data.hWnd=GetSafeHwnd(); *^bqpW2$q  
 data.uID=98; R;.zS^LL  
 Shell_NotifyIcon(NIM_DELETE,&data); sEt5!&  
 ShowWindow(SW_SHOW); y>'^<xk  
 SetForegroundWindow(); OthQ)&pq X  
 ShowWindow(SW_SHOWNORMAL); 30-XFl  
 bTray=FALSE; Sir7TQ4B  
} YT+fOndjaF  
UO5^4  
void CCaptureDlg::OnChange() ,}2M'DSWa  
{ x|<rt96 6A  
 RegisterHotkey(); /(8Usu?g.  
} ;+>-uPT/1  
IVzJ|  
BOOL CCaptureDlg::RegisterHotkey() ,@tY D(Z  
{ \m1r(*Ar  
 UpdateData(); lsCD%P  
 UCHAR mask=0; wA|m/SZx  
 UCHAR key=0; 0R\lm<&  
 if(m_bControl) )}\jbh>RH  
  mask|=4; ;hA>?o_i(  
 if(m_bAlt) yw41/jHF  
  mask|=2; s 4Lqam!  
 if(m_bShift) - U!:.  
  mask|=1; K%P$#a  
  key=Key_Table[m_Key.GetCurSel()]; iK#5HW{  
 if(bRegistered){ JBtcl# |  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); 5rRYv~+  
  bRegistered=FALSE; Tm-Nz7U^^  
 } UpL?6)  
 cMask=mask; k {_X%H/  
 cKey=key; d^ L` dot  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); r"x|]nvg^  
 return bRegistered; 0V`s 3,k  
} +e);lS"+/  
"1$OPt5  
  四、小结 {(U?)4@  
8`Q8Mct$<  
  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:
3+5=?,请输入中文答案:八 正确答案:八