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
  • 6946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: &\4AvaeA8y  
  Dg%zNi2GS  
  一、实现方法 *5]fjh{  
(p26TN;*$5  
  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: -MOPm]iA  
t Krr5SRb  
#pragma data_seg("shareddata") lidzs<W-fW  
HHOOK hHook =NULL; //钩子句柄 sh[Yu  
UINT nHookCount =0; //挂接的程序数目 E9HA8  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 q0{KYWOvk  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 RzQ1Wq  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey 9"1 0:\U  
static int KeyCount =0; >w+WG0Z K  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 k-xh-&  
#pragma data_seg() &F9BaJ  
{\j h? P|  
  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。 i%+cPQ^o  
~V[pu  
  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: ;X-~C.7k  
cOcF VPQ  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR f;`pj`-k%  
cKey,UCHAR cMask) "8%B (a 5A  
{ Pe8W Br;`  
 BOOL bAdded=FALSE; =z'- B~  
 for(int index=0;index<MAX_KEY;index++){ =:n>yZ3T  
  if(hCallWnd[index]==0){ z:-a7_   
   hCallWnd[index]=hWnd; _O2},9L n  
   HotKey[index]=cKey; &1YqPk  
   HotKeyMask[index]=cMask; evNo(U\C  
   bAdded=TRUE; 3Ba>a(E  
   KeyCount++; v+f:VA  
   break; a'U7 t  
  } I-oI,c%+  
 } >(S4h}^I  
 return bAdded; Wk"4mq  
} _"SE^_&c  
//删除热键 <uDEDb1|l  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) [H)NkR;I  
{ v]\io#   
 BOOL bRemoved=FALSE; eyf\j,xP&  
 for(int index=0;index<MAX_KEY;index++){ iM+K&\{_h  
  if(hCallWnd[index]==hWnd){ fu'iG7U M  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ %l%5Q;t  
    hCallWnd[index]=NULL; -hj@^Auf  
    HotKey[index]=0; MKLntX  
    HotKeyMask[index]=0; >B/ jTn5=  
    bRemoved=TRUE; a_XM2dc%  
    KeyCount--; "-Gjw B  
    break; S%<RV6{aiM  
   } - FV$Sne  
  } L ?g|:  
 } #-dfG.*  
 return bRemoved; T{3C3EE?]  
} MEMD8:['  
{i y[8eLg  
jOj`S%7  
  DLL中的钩子函数如下: ?F]Yebp^  
EM!#FJh  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) H$TYp  
{ &54fFyJF  
 BOOL bProcessed=FALSE; n_\V G[f  
 if(HC_ACTION==nCode) 8aZuI|z  
 { 2*Hw6@Jj  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 Q3> 3!FAO  
   switch(wParam) c9imfA+e  
   {  l[lUmE  
    case VK_MENU: DqyJ]}|  
     MaskBits&=~ALTBIT; . [DCL  
     break; 2:'C|  
    case VK_CONTROL: =xcA4"k  
     MaskBits&=~CTRLBIT; .WM0x{t/  
     break; T.O^40y  
    case VK_SHIFT: P5/K?I~/So  
     MaskBits&=~SHIFTBIT; {vYmK#}  
     break; ktLXL;~X  
    default: //judge the key and send message WqP>cl2Lm  
     break; nD6mLNi%a  
   } 3"=% [  
   for(int index=0;index<MAX_KEY;index++){ M,@\*qlEJ  
    if(hCallWnd[index]==NULL) RaT(^b(  
     continue; 1;cV [&3  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) Fgq"d7`9@  
    { @/h_v#W  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); %}jwuNGA  
     bProcessed=TRUE; 9k8ftxB^  
    } -BUxQ8/,  
   } x)0g31 4 9  
  } 7NC"}JB&  
  else if((lParam&0xc000ffff)==1){ //有键按下 V_f}Y8>e  
   switch(wParam) nM:e<`r  
   { T P'  
    case VK_MENU: tu\;I{ h=0  
     MaskBits|=ALTBIT; XH4!|wz  
     break; nN" Y~W^k  
    case VK_CONTROL: h- .V[]<  
     MaskBits|=CTRLBIT; ,9<}V;(  
     break; S|!)_RL  
    case VK_SHIFT: a@`15O:  
     MaskBits|=SHIFTBIT; f`'?2  
     break; K=Z~$)Og)  
    default: //judge the key and send message ULc oti=,  
     break; ^$qr6+  
   } z-fP #.  
   for(int index=0;index<MAX_KEY;index++){ [uK*=K/v  
    if(hCallWnd[index]==NULL) ] -"~?  
     continue; s\ft:a@  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) $z,lq#zzl  
    { j<H`<S  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); lx*"Pj9hho  
     bProcessed=TRUE; ~_ss[\N  
    } ?B ; +,  
   } *y[i~{7:  
  } Jydz2 zt!  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 )6U&^9=  
   for(int index=0;index<MAX_KEY;index++){ [uCW8:e  
    if(hCallWnd[index]==NULL)  O\y #|=d  
     continue; X`bN/sI  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) t mAj  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); [kwVxaI  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 =au7'i|6  
   } 4mR{\ d  
  } gwE#,OY*  
 } xGsg'  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); DM"nxTVre  
} |uo<<-\jTO  
 fp!Ba  
  抓图程序是一个基于对话框的程序,它在建立对话框的时候调用前面的DLL,登记热键,因此需要将hook.lib添加到工程里,在程序里给出两个DLL函数的定义,也可以写个头文件,再包含进来以下代码: =d>^q7s  
u1K;{>4lx  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); t\44 Pu%  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); 0>hV?A  
USF&;M3  
  为了添加应用程序对热键通知事件的响应,程序中用的办法是重载WindowProc()函数,该函数代码如下: d*3;6ZLy  
j2O?]M  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) <=WSX{_D  
{ P5 GM s  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) H9'Y` -r  
 { ;xF5P'T?|  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 zK.%tx}+=k  
  SaveBmp(); = 7%1]  
  return FALSE; mqL&bmT  
 } iW.4'9   
 …… //其它处理及默认处理 On%21L;JG  
} Hc.r/  
pzcV[E1  
c%p7?3Ry  
  将屏幕图像保存到BMP文件中的任务是由函数SaveBmp()来完成的,具体实现参见代码部分。另外为了顺利实现屏幕抓图,程序中还实现了"托盘"功能,由于这一部分本书在实例中已经专门介绍过了,所以不再赘述,读者朋友可以参考相关实例。 -I."= c%  
r|!w,>.  
  最后需要提醒读者朋友们注意的是,源程序的编译与使用时要先编译hook.dll并将其放在系统目录(win2000/NT是system32,98/ME是system),然后编译对话框程序运行即可。 .b'o}DLa  
tXj28sh$  
  二、编程步骤 CBaU$`5  
?VC[%sjwn  
  1、 启动Visual C++,生成一个DLL项目和一个基于对话框的应用程序项目,并将两个项目分别命名为"Hook"和"Capture"; >y&Db  
^Mw>'*5^  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; }.md$N_F  
kmHIU}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; +EI+@hS  
-h=K]Y{`  
  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; T)%34gN  
9 Yv;Dom  
  5、 添加代码,编译运行程序。 uJ:'<dJ  
@C[]o.r  
三、程序代码 Y1 e>P  
!uaV6K  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL 6ww4ZH?j  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) k.Tu#7  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ j ys1Ki  
#if _MSC_VER > 1000 a<AT;Tc  
#pragma once Nb.AsIR^  
#endif // _MSC_VER > 1000 "4W@p'  
#ifndef __AFXWIN_H__ 3`y9V2&b  
#error include 'stdafx.h' before including this file for PCH fq^D<c{3  
#endif FPM@%U  
#include "resource.h" // main symbols );4lM%]eb  
class CHookApp : public CWinApp ?.E ixGzI^  
{ dWR0tS6vR`  
 public: w!$|IC  
  CHookApp(); jKFypIZ4  
  // Overrides QWt ?` h=  
  // ClassWizard generated virtual function overrides ~ Iin|  
  //{{AFX_VIRTUAL(CHookApp) H(qDQqJHYy  
 public: C$MaJHkiF  
  virtual BOOL InitInstance(); CV/ei,=9  
  virtual int ExitInstance(); u\~dsD2)q  
  //}}AFX_VIRTUAL om$x;L6  
  //{{AFX_MSG(CHookApp) T KpX]H`  
  // NOTE - the ClassWizard will add and remove member functions here. bMT1(edm  
  // DO NOT EDIT what you see in these blocks of generated code ! Yh`P+L  
  //}}AFX_MSG Tac7+=T  
  DECLARE_MESSAGE_MAP() G8}w|'0m  
}; A?l.(qG C_  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); _D%aT6,G+(  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); KA)9&6  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); L_fu<W  
BOOL InitHotkey(); yKJKQ9  
BOOL UnInit(); ;{Cr+lqTJ  
#endif r:h\{ DVf  
OnO56,+S^  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. <~9z.v7  
#include "stdafx.h" oj.f uJD  
#include "hook.h" D ==H{c1F  
#include <windowsx.h> U1pL `P1  
#ifdef _DEBUG  3*@ sp  
#define new DEBUG_NEW r^3QDoy  
#undef THIS_FILE %'2DEt??  
static char THIS_FILE[] = __FILE__; p|mt2oDjw  
#endif <0my,hAK  
#define MAX_KEY 100 I!IWmU6FN  
#define CTRLBIT 0x04 3QL I|VpO  
#define ALTBIT 0x02 m.ib#Y)y  
#define SHIFTBIT 0x01 ImJ2tz6  
#pragma data_seg("shareddata") g'G"`)~ 2  
HHOOK hHook =NULL; YGy.39@31  
UINT nHookCount =0; B+:'Ld](  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey %T:~N<8)  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT N(<4nAE  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey H38ODWO3  
static int KeyCount =0; mjdZ^  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift '1?b?nVo  
#pragma data_seg() ]IQTf5n  
HINSTANCE hins; d! 0p^!3  
void VerifyWindow(); xL,;(F\^  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) n(-1vN  
//{{AFX_MSG_MAP(CHookApp) l4c9.'6  
// NOTE - the ClassWizard will add and remove mapping macros here. =]r<xON%S  
// DO NOT EDIT what you see in these blocks of generated code! YXCfP~i  
//}}AFX_MSG_MAP C[h"w'A2  
END_MESSAGE_MAP() P$E#C:=  
h+o-h4X  
CHookApp::CHookApp() B%95M|  
{ Obd@#uab  
 // TODO: add construction code here, *QAcp` ;*  
 // Place all significant initialization in InitInstance 8r@_b  
} "F/%{0d  
{(r`&[  
CHookApp theApp; @y,pf Wh`  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) BM+v,hGY  
{ N%Gb  
 BOOL bProcessed=FALSE; n_[;2XQQ  
 if(HC_ACTION==nCode) -nP y?>p"|  
 { rt+%&% wt  
  if((lParam&0xc0000000)==0xc0000000){// Key up ?[#nh@mI  
   switch(wParam) Ogp Zwwk  
   { @ i $jyc  
    case VK_MENU: aw z(W >  
     MaskBits&=~ALTBIT; "F nH>g-  
     break; >BU"C+a8g  
    case VK_CONTROL: B5'-v%YO+  
     MaskBits&=~CTRLBIT; nCF1i2*6|"  
     break; 8PQKB*<dB"  
    case VK_SHIFT: n&V\s0  
     MaskBits&=~SHIFTBIT; #*QnO\.  
     break; IbFS8 *a\  
    default: //judge the key and send message 3 o=R_%r  
     break; dtHB@\1  
   } 9V5}%4k%+  
   for(int index=0;index<MAX_KEY;index++){ CmyCne   
    if(hCallWnd[index]==NULL) B%P g:|  
     continue; <Sm@ !yx  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) xY] Y  
    { 8G&'ED_&  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); WCc7 MK  
     bProcessed=TRUE; C"`,?K(U  
    } Bp #:sAG  
   } y8j wfO3  
  } HE>6A|rgDr  
  else if((lParam&0xc000ffff)==1){ //Key down p:kHb@  
   switch(wParam) .UJp#/EHs  
   { 3i KBVN  
    case VK_MENU: 6Z2a5zO8  
     MaskBits|=ALTBIT; QtM9G@%  
     break; BhJag L ^o  
    case VK_CONTROL: lOk'stLNa&  
     MaskBits|=CTRLBIT; -+9,RtHR7  
     break; .d}7c!  
    case VK_SHIFT: Rn(6Fk?   
     MaskBits|=SHIFTBIT; ;3~+M:{2  
     break; QLr.5Wcg>  
    default: //judge the key and send message ~!bA<q  
     break; ,E YB E  
   } B !>hHQ2  
   for(int index=0;index<MAX_KEY;index++) pAZD>15l"  
   { VZ69s{/.B  
    if(hCallWnd[index]==NULL) <$H-/~Y  
     continue; NT3Ti ?J,  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) 3m2hB%SNb  
    { H Pvs~`>V  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); mpcO-%a  
     bProcessed=TRUE; 6;JlA})  
    }  ' ];|  
   } &\w:jI44Bs  
  } -pb>=@Yq  
  if(!bProcessed){ {`X O3  
   for(int index=0;index<MAX_KEY;index++){ h3.6<vM  
    if(hCallWnd[index]==NULL) d :(&q  
     continue; [ \41  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) 7Pb: z4j  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); OhNEt>  
   } Q^p> hda  
  } ;s$bVGHr  
 } /*$B  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); 1-!q,q  
} RxeyMNd  
]ULE>a  
BOOL InitHotkey() q!r4"#Y"@Z  
{ ZSs)AB_Pe/  
 if(hHook!=NULL){ /E%r@Rui3$  
  nHookCount++; f&ZFG>)6  
  return TRUE; p  K=  
 } ;XUiV$  
 else 4/_@F>I_  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); ZvSWIQ6  
  if(hHook!=NULL) J/-&Fa\(  
   nHookCount++; 0q4E^}iR  
  return (hHook!=NULL); EKr#i}(x<  
} 6/4?x)l3-  
BOOL UnInit() QOfqW@g  
{ K0YUN^St  
 if(nHookCount>1){ JsDugn ,B  
  nHookCount--; 94Hs.S)  
  return TRUE; JGZxNUr^  
 } BS(XEmJn&j  
 BOOL unhooked = UnhookWindowsHookEx(hHook); :)PAj  
 if(unhooked==TRUE){ vwc)d{ND  
  nHookCount=0; $h)VKW^\  
  hHook=NULL; -nsI5\]  
 } &OXnZT3P  
 return unhooked; 0/g 0=dW=  
} #JLxM/5^1~  
8B|qNf `Yi  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) ,'FdUq)i  
{ dM^1O-K:  
 BOOL bAdded=FALSE; vz^w %67&  
 for(int index=0;index<MAX_KEY;index++){ Z: e|~#  
  if(hCallWnd[index]==0){ ~AX@o-WU  
   hCallWnd[index]=hWnd; G\I DgPj`  
   HotKey[index]=cKey; Qgel^"t]i  
   HotKeyMask[index]=cMask; _$f XK  
   bAdded=TRUE; n>5/y c"/q  
   KeyCount++; en1NFP  
   break; B(z?IW&  
  } zHT22o56X  
 } QE b ^'y  
 return bAdded;  > h>  
} ~\ C.Nm  
+)cjW"9  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) {dk%j~w8  
{ c-ud $0)c  
 BOOL bRemoved=FALSE; ]a ,H!0i  
 for(int index=0;index<MAX_KEY;index++){ TSPFi0PP  
  if(hCallWnd[index]==hWnd){ WF!u2E+  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ j1sZRl)D  
    hCallWnd[index]=NULL; ]'%Z&1 w  
    HotKey[index]=0; 3EHn}#+U  
    HotKeyMask[index]=0; %`F &,!d  
    bRemoved=TRUE; x U1](O  
    KeyCount--; }CoR$K   
    break; bL)7 /E  
   } a7_&;  
  } =D@+_7\?  
 } `RriVYc<  
 return bRemoved; ~Ip-@c}'j  
} 7"iUyZ(  
4)zHkN+  
void VerifyWindow() HLa3lUo  
{ ~%8T_R/3  
 for(int i=0;i<MAX_KEY;i++){ 2^*a$ OJ  
  if(hCallWnd!=NULL){ &.ENcEic  
   if(!IsWindow(hCallWnd)){ [;E~A  
    hCallWnd=NULL; 82z\^a  
    HotKey=0; &/}reE*  
    HotKeyMask=0; p}r1@L s  
    KeyCount--; Z fQzA}QD  
   } uq~Z  
  } Vp5i i]B4  
 } tt=JvI9>  
} X5V8w4NN  
5R?[My  
BOOL CHookApp::InitInstance() RF,[1O-\O  
{ ROv(O;.Ty  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); .h0@Vs  
 hins=AfxGetInstanceHandle(); )fRZ}7k:  
 InitHotkey(); }ob&d.XZ  
 return CWinApp::InitInstance(); VXM5 B  
} LrL ZlJf  
XlPi)3m4/S  
int CHookApp::ExitInstance() a(qij&>  
{ Xv~v=.HNhk  
 VerifyWindow(); d5hYOhO[  
 UnInit(); ry2ZVIFa  
 return CWinApp::ExitInstance(); YoT< ]'  
} gYtv`O  
[i&EUvo  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file =FB[<%  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) T=NF5kj-=  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ \fk%^1XY  
#if _MSC_VER > 1000 ;AjY-w  
#pragma once 2!7)7wlj0  
#endif // _MSC_VER > 1000 =tS1|_  
C'_^DPzj  
class CCaptureDlg : public CDialog 4=Wtv/ 3  
{ GmONhh(k  
 // Construction OIqisQ7ZB  
 public: 6ojEEM  
  BOOL bTray; N>+s8L.?  
  BOOL bRegistered; *i=+["A  
  BOOL RegisterHotkey(); E/OJ}3Rf  
  UCHAR cKey; /CE]7m,7~K  
  UCHAR cMask; %/K'VE6pb  
  void DeleteIcon(); -Tzp;o  
  void AddIcon(); ~)ecQ  
  UINT nCount; g}vOp3 ^  
  void SaveBmp(); vLc7RL  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor X:un4B}O  
  // Dialog Data `ZC{<eVJ}=  
  //{{AFX_DATA(CCaptureDlg) ~"Kf+eFi  
  enum { IDD = IDD_CAPTURE_DIALOG }; 5q.d$K |  
  CComboBox m_Key; |U GmIm%  
  BOOL m_bControl; iut[?#f^  
  BOOL m_bAlt; iPD5 KsAOA  
  BOOL m_bShift; BotGPk><c  
  CString m_Path; o9j*Yz  
  CString m_Number; &8##)tS(y  
  //}}AFX_DATA :3uCW1  
  // ClassWizard generated virtual function overrides {N \ri{|  
  //{{AFX_VIRTUAL(CCaptureDlg) 9(\eL9^  
 public: yX {CV7%O  
  virtual BOOL PreTranslateMessage(MSG* pMsg); WeqE 9@V  
 protected: 8Moe8X#3  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support FR7DuH/f)  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); DR d|m<Z  
  //}}AFX_VIRTUAL 5`!Bj0Uf  
  // Implementation $,/;QP}  
 protected: X J+y5at  
  HICON m_hIcon; pBd_Ba N  
  // Generated message map functions d>RoH]K4  
  //{{AFX_MSG(CCaptureDlg) ^-*q  
  virtual BOOL OnInitDialog(); l@h|os  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); 86bRfW'  
  afx_msg void OnPaint(); )@IDmz>  
  afx_msg HCURSOR OnQueryDragIcon(); @y|ZXPC#  
  virtual void OnCancel(); S,=#b 4\#%  
  afx_msg void OnAbout(); pd3=^ Zi  
  afx_msg void OnBrowse(); h.QsI`@f  
  afx_msg void OnChange(); 3 N5un`K7  
 //}}AFX_MSG y4V~fg;  
 DECLARE_MESSAGE_MAP() ke+3J\;>  
}; (9"w{pnlLc  
#endif J'Z!`R|  
ZQ%4]=w  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file B8f BX!u/  
#include "stdafx.h" ~x!"(  
#include "Capture.h" '=M4 (h  
#include "CaptureDlg.h" %![%wI?  
#include <windowsx.h> Ih&rXQ$  
#pragma comment(lib,"hook.lib") q& :UP  
#ifdef _DEBUG l/wdu(  
#define new DEBUG_NEW \V1geSoE  
#undef THIS_FILE 4 8}\  
static char THIS_FILE[] = __FILE__; $N}nO:`t  
#endif ZFJ qI  
#define IDM_SHELL WM_USER+1 o'Uaz*-po  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); Ib~n}SA  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); *VbB'u:  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; LU=<? "N6  
class CAboutDlg : public CDialog b3zxiq x  
{ Hv>16W$_  
 public: ;Nd,K C0k  
  CAboutDlg(); bh[`uRC}  
  // Dialog Data ytWTJ>L  
  //{{AFX_DATA(CAboutDlg) nx2iEXsa  
  enum { IDD = IDD_ABOUTBOX }; y<h~jz#hkq  
  //}}AFX_DATA cnm*&1EzV  
  // ClassWizard generated virtual function overrides FC +}gJ(q  
  //{{AFX_VIRTUAL(CAboutDlg) mh4<.6>5  
 protected: ,4OH9 -Q1  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support daX$=n  
  //}}AFX_VIRTUAL ^L,Uz:[J  
  // Implementation wT taj08D  
 protected: 0bcbH9) 1q  
  //{{AFX_MSG(CAboutDlg) ;RElG>#$  
  //}}AFX_MSG si!jB%^  
  DECLARE_MESSAGE_MAP() bW/^2B  
}; "u H VX|`  
5LkpfmR  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) %VSjMZ  
{ FxkxV GZ"  
 //{{AFX_DATA_INIT(CAboutDlg) ~vL`[JiK  
 //}}AFX_DATA_INIT mF6 U{=  
} H2cY},  
Wf}x"*  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) w.:fl4V  
{ ##+f/Fxym  
 CDialog::DoDataExchange(pDX); (Cc!Iw'0M  
 //{{AFX_DATA_MAP(CAboutDlg) m|c5X)}-  
 //}}AFX_DATA_MAP b}C6/ zW  
} uQ_s$@brI  
2H]~X9,z2  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) #cF ?a5  
 //{{AFX_MSG_MAP(CAboutDlg) #\{j/{VZ  
 // No message handlers f\zu7,GU  
 //}}AFX_MSG_MAP k7R}]hq]""  
END_MESSAGE_MAP() .O1Kwu  
oA;> z  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) "A>/m"c]*  
: CDialog(CCaptureDlg::IDD, pParent) jx?"m=`s:  
{ (9A`[TRwi  
 //{{AFX_DATA_INIT(CCaptureDlg) .Jvy0B} B  
  m_bControl = FALSE; gWK NC  
  m_bAlt = FALSE; Vlka+$4!  
  m_bShift = FALSE; $Rd]e C  
  m_Path = _T("c:\\"); ,5 ylrE  
  m_Number = _T("0 picture captured."); zfBaB0P  
  nCount=0; FZi'#(y  
  bRegistered=FALSE; Cbq|<p# #o  
  bTray=FALSE; t#eTn";  
 //}}AFX_DATA_INIT 8#_"WzDw  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 X^% E"{!nU  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); <:YD.zAh|  
} _]/&NSk  
@8$3Q,fF(  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) 7k==?,LG3  
{ h]w5N2$}?  
 CDialog::DoDataExchange(pDX); NA<6s]Cs.  
 //{{AFX_DATA_MAP(CCaptureDlg) |E7)s;}D  
  DDX_Control(pDX, IDC_KEY, m_Key); 1^HUu"Kt  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); B+pJWl8u  
  DDX_Check(pDX, IDC_ALT, m_bAlt); "KhVS  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); k@RIM(^t  
  DDX_Text(pDX, IDC_PATH, m_Path); [h=[@jiB  
  DDX_Text(pDX, IDC_NUMBER, m_Number); a=%QckR*  
 //}}AFX_DATA_MAP 2{gd4Kt6.  
} "?Mf%u1R  
;<~lzfs  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) 'aAay*1  
//{{AFX_MSG_MAP(CCaptureDlg) MV,;l94?%=  
 ON_WM_SYSCOMMAND() (4 6S^*  
 ON_WM_PAINT() S^/:O.X)c,  
 ON_WM_QUERYDRAGICON() aN}l&4d  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) {W5D)  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) M,f|.p{,Y  
 ON_BN_CLICKED(ID_CHANGE, OnChange) tG"lI/  
//}}AFX_MSG_MAP |AS`MsbI9  
END_MESSAGE_MAP() SB<09|2  
1qgzb  
BOOL CCaptureDlg::OnInitDialog() wwI'n*Q'$  
{ ;[[GA0  
 CDialog::OnInitDialog(); Wt8=j1>  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); G._E9  
 ASSERT(IDM_ABOUTBOX < 0xF000); d mj T$a|  
 CMenu* pSysMenu = GetSystemMenu(FALSE); ?4 &C)[^  
 if (pSysMenu != NULL) e52y}'L  
 { *?Pbk+}%  
  CString strAboutMenu; faJ>,^V#  
  strAboutMenu.LoadString(IDS_ABOUTBOX); /t<C_lLM  
  if (!strAboutMenu.IsEmpty()) `=B0NC.3  
  { V.8pxD5 s  
   pSysMenu->AppendMenu(MF_SEPARATOR); ji~P?5(:  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); 5csqu^/y  
  } i H^Gv*  
 } G^ 2a<?Di  
 SetIcon(m_hIcon, TRUE); // Set big icon \a|bx4M  
 SetIcon(m_hIcon, FALSE); // Set small icon NL-<K  
 m_Key.SetCurSel(0); U $ bLt  
 RegisterHotkey(); J% t[{  
 CMenu* pMenu=GetSystemMenu(FALSE); z12c9k%s  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); IRxFcLk  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); )&$Zt(  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); .eSMI!Y=  
 return TRUE; // return TRUE unless you set the focus to a control ny,a5zEnF  
} p 7YfOUo k  
YyZ>w2_MTi  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) vG7aT  
{ )ZI9n7  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) `PY>p!E  
 { mu!hD^fw  
  CAboutDlg dlgAbout; q|[P[7z  
  dlgAbout.DoModal(); 2EdKxw3$]  
 } -5Km 9X8  
 else #O |Z\|n  
 { #1v>3H(  
  CDialog::OnSysCommand(nID, lParam); _cW (R,i  
 } s|1BqoE  
} \"r*wae  
y.LJ 5K$&a  
void CCaptureDlg::OnPaint() ,3zF_y(*Y  
{ cVR3_e{&H  
 if (IsIconic()) =>0+BD  
 { #] @<YKoV{  
  CPaintDC dc(this); // device context for painting <Rl:=(]i~  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); V`n;W6Q17  
  // Center icon in client rectangle -UPlQL  
  int cxIcon = GetSystemMetrics(SM_CXICON); 3]X9 z  
  int cyIcon = GetSystemMetrics(SM_CYICON); Jhyb{i8RR  
  CRect rect; G|p3NhLgO=  
  GetClientRect(&rect); ~4Gs\U:!Q  
  int x = (rect.Width() - cxIcon + 1) / 2; 4rh*&'  
  int y = (rect.Height() - cyIcon + 1) / 2; iuX82z`  
  // Draw the icon % 1+\N  
  dc.DrawIcon(x, y, m_hIcon); %>cl0W3x  
 } kJJUu  
 else eDm~B (G$  
 { ;gh#8JkI  
  CDialog::OnPaint(); F=29"1 ._  
 } $=c79Al(  
} (X rrnoz  
9\/T #EP  
HCURSOR CCaptureDlg::OnQueryDragIcon() J#0oL_xY#  
{ C^ hHt,&  
 return (HCURSOR) m_hIcon; k+"+s bsW'  
} ',Mi D=_  
l#FW#`f  
void CCaptureDlg::OnCancel() vFK&63  
{ 7H-,:8  
 if(bTray) P~)ndaQ  
  DeleteIcon(); #L{+V?  
  CDialog::OnCancel(); .Z!!x  
} RsYn6ozb  
+7jr]kP9  
void CCaptureDlg::OnAbout() PC| U]  
{ 0`KB|=>  
 CAboutDlg dlg; %0PdN@I  
 dlg.DoModal(); S^GB\uJ  
} F Ty`#*7Ul  
XIu3n9g^#  
void CCaptureDlg::OnBrowse() 'oZ/fUl|7  
{ N#;k;Z'iL  
 CString str; CjzfU*G  
 BROWSEINFO bi; No)v&P%  
 char name[MAX_PATH]; cJ G><'  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); :<OInKE>Cx  
 bi.hwndOwner=GetSafeHwnd(); }mjJglK!N  
 bi.pszDisplayName=name; OE!:`Bo3T  
 bi.lpszTitle="Select folder"; GfAt-huL(  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; Ojkbv  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); :\@WY  
 if(idl==NULL) Hp_3BulS<  
  return; 8c m,G  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); T/ CI?sn  
 str.ReleaseBuffer(); ExDH@Lb  
 m_Path=str; Jy'ge4]3  
 if(str.GetAt(str.GetLength()-1)!='\\') @L%9NqE`O  
  m_Path+="\\"; *'+OA6  
 UpdateData(FALSE); Gd)@PWK  
} BJ3st  
29K09 0f  
void CCaptureDlg::SaveBmp() D?rQQxb  
{ #&G^%1!  
 CDC dc; IKM=Q. 7j  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); ui4H(A'}  
 CBitmap bm; =:U63  
 int Width=GetSystemMetrics(SM_CXSCREEN); jg?B][  
 int Height=GetSystemMetrics(SM_CYSCREEN); Dg]ua5jk  
 bm.CreateCompatibleBitmap(&dc,Width,Height); 0px@3/  
 CDC tdc; =KwG;25hX  
 tdc.CreateCompatibleDC(&dc); 30Nya$$A=  
 CBitmap*pOld=tdc.SelectObject(&bm); slEsSR'J]  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); uG\ +`[-{0  
 tdc.SelectObject(pOld); E+$vIYq:W  
 BITMAP btm; :K&   
 bm.GetBitmap(&btm); YMG{xGPtM  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; fbS l$jn.  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); Ys10r-kDS  
 BITMAPINFOHEADER bih; $4`RJ{ZJw]  
 bih.biBitCount=btm.bmBitsPixel; w \pD'1e  
 bih.biClrImportant=0; 06I'#:]  
 bih.biClrUsed=0; g2 uc+p  
 bih.biCompression=0; @b2{'#9]}  
 bih.biHeight=btm.bmHeight; ^;B vd!  
 bih.biPlanes=1; !`vm7FN"u  
 bih.biSize=sizeof(BITMAPINFOHEADER); lY_E=K]  
 bih.biSizeImage=size; $kJvPwRO  
 bih.biWidth=btm.bmWidth; {4&G\2<^^  
 bih.biXPelsPerMeter=0; 6OMywGI[Z  
 bih.biYPelsPerMeter=0; -san%H'  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); ]yN]^% PYH  
 static int filecount=0; ;$(a+?  
 CString name; E9 {Gaa/{  
 name.Format("pict%04d.bmp",filecount++); \$s<G|<P  
 name=m_Path+name; @* L^Jgn  
 BITMAPFILEHEADER bfh; Oh<[8S7]C  
 bfh.bfReserved1=bfh.bfReserved2=0; XU.ZYYZ=  
 bfh.bfType=((WORD)('M'<< 8)|'B'); J0w[vrs&]  
 bfh.bfSize=54+size; vk+TWf  
 bfh.bfOffBits=54; YMnG-'^Z  
 CFile bf; x=yBB;&  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ *G$tfb(  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); d c_^   
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); UaCEh?D+Y  
  bf.WriteHuge(lpData,size); wFpt#_fS  
  bf.Close(); c+#GX)zh\G  
  nCount++; Z=DAA+T`  
 } 2}1(j  
 GlobalFreePtr(lpData); c]F$$BT  
 if(nCount==1) r ,|T@|{  
  m_Number.Format("%d picture captured.",nCount); qev1bBW  
 else <iiu%   
  m_Number.Format("%d pictures captured.",nCount); tR!eYt  
  UpdateData(FALSE); A\lnH5A  
} +Tde#T&[  
[zIX&fPk$  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) \?h +  
{ "ji4x y  
 if(pMsg -> message == WM_KEYDOWN) ;JA2n\iP,  
 { Fs<kMT  
  if(pMsg -> wParam == VK_ESCAPE) O9oVx4=  
   return TRUE; ^]^Y~$u  
  if(pMsg -> wParam == VK_RETURN) _Qs )~  
   return TRUE; p0? X R  
 } +bI&0`  
 return CDialog::PreTranslateMessage(pMsg); .Ff;St  
} 5 |{0|mP  
EbuOPa  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) WZdA<<,:o  
{ V:)k@W?P  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ J6_H lt  
  SaveBmp(); &6FRw0GX  
  return FALSE; I,QJ/sI  
} aePhtQF  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ . [+ObF9=  
 CMenu pop; J %jf uj  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); SoS[yr  
 CMenu*pMenu=pop.GetSubMenu(0); %#2[3N{  
 pMenu->SetDefaultItem(ID_EXITICON); J:)Q)MT24:  
 CPoint pt; -7TT6+H)  
 GetCursorPos(&pt); fyYT#r  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); c^}gJ  
 if(id==ID_EXITICON) yAG4W[  
  DeleteIcon(); F N;X"it.  
 else if(id==ID_EXIT) Erl"X}P  
  OnCancel();  nsij;C  
 return FALSE; "d/x`Dx  
} [zn`vT  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); a"EP`  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) Sb>;k(;`:  
 AddIcon(); i>_V?OT#5  
 return res; U%"c@%B0  
} Nj*J~&6G  
&!2 4l=!  
void CCaptureDlg::AddIcon() O1Ey{2Q  
{ ;:vbOG#aSN  
 NOTIFYICONDATA data; Ti#2D3  
 data.cbSize=sizeof(NOTIFYICONDATA); ?W1( @.  
 CString tip; uXxyw7\W  
 tip.LoadString(IDS_ICONTIP); s[nXr   
 data.hIcon=GetIcon(0); r^n%PH <  
 data.hWnd=GetSafeHwnd(); ]Hc `<P  
 strcpy(data.szTip,tip); ~A}"s-Kq5  
 data.uCallbackMessage=IDM_SHELL; |s+[489g'6  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; PZKKbg2 S  
 data.uID=98; gsGwf[XdJ  
 Shell_NotifyIcon(NIM_ADD,&data); AVGb;)x#  
 ShowWindow(SW_HIDE); {1'XS,2  
 bTray=TRUE; iyc}a6g  
} qm4 Ejc<  
fBR,Oneo  
void CCaptureDlg::DeleteIcon() BOrfKtG\  
{ HtgVD~[]  
 NOTIFYICONDATA data; ha1 J^e  
 data.cbSize=sizeof(NOTIFYICONDATA); =PP]LDlJs  
 data.hWnd=GetSafeHwnd(); vK!,vKa.  
 data.uID=98; aU<0<Dx  
 Shell_NotifyIcon(NIM_DELETE,&data); =7e~L 3 K  
 ShowWindow(SW_SHOW); ={~`0,  
 SetForegroundWindow(); E[/<AY^@!z  
 ShowWindow(SW_SHOWNORMAL); UaiDo"i  
 bTray=FALSE; qtnLQl"M  
} QK&<im-  
7C9qkQ Jqn  
void CCaptureDlg::OnChange() Yl% Ra1  
{ )3=oS1p  
 RegisterHotkey(); xqmP/1=NO  
} Xnt`7L<L  
zq80}5%2CT  
BOOL CCaptureDlg::RegisterHotkey() RvZi%)  
{ b&"=W9(V  
 UpdateData(); BLgmF E2  
 UCHAR mask=0; Y 6K<e:Y  
 UCHAR key=0; cAM1\3HWT"  
 if(m_bControl) 'M=(5p  
  mask|=4; w[I%Id;E  
 if(m_bAlt) 8|.( Y  
  mask|=2; AmM^&  
 if(m_bShift) aAh")B2  
  mask|=1; # 5v 2`|)  
  key=Key_Table[m_Key.GetCurSel()]; T?N' k=   
 if(bRegistered){ cR 4xy26s  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); "pa5+N&2-  
  bRegistered=FALSE; #*BcO-N  
 } M}!7/8HUC  
 cMask=mask; w")VcAq  
 cKey=key; Q!7Er  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); rV<yM$IA  
 return bRegistered; >:4}OylhM  
} :O-Y67>&  
^:5 ;H=.  
  四、小结 pa N )t  
3;Kv9i<~LE  
  本实例通过一个钩子DLL实现了屏幕抓图的功能,它有一个缺陷,那就是只能保存整个屏幕图像,不过读者朋友可以在此基础上,实现屏幕任意区域的抓图功能,具体方法不再赘述,实现起来很容易的了,呵呵。
评价一下你浏览此帖子的感受

精彩

感动

搞笑

开心

愤怒

无聊

灌水
描述
快速回复

您目前还是游客,请 登录注册
如果您提交过一次失败了,可以用”恢复数据”来恢复帖子内容
认证码:
验证问题:
10+5=?,请输入中文答案:十五