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
  • 7274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: QL_~E;U  
  e+Qq a4  
  一、实现方法 Z' cQ< f  
mM*jdm(!  
  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: EP!zcp2' C  
cM9z b6m  
#pragma data_seg("shareddata") W*D]?hXU;  
HHOOK hHook =NULL; //钩子句柄 ,{4G@:Fm  
UINT nHookCount =0; //挂接的程序数目 be ^09'  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 JPeZZ13sS  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 \2$-.npz  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey h( lkC[a&  
static int KeyCount =0; M6$9-  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 ",U>;`  
#pragma data_seg() j Wa%vA  
_,S L;*G4|  
  关于共享段,有几点重要的说明:一是必须在链接选项里指定该段为共享:一种方法是在project->settings->link->object/library中加上/section:shareddata,rws;第二种方法是在def文件的sections里加上一句shareddata read write shared;第三种指定共享段的方法在程序里加上一句#pragma comment(linker,"section:shareddata,rws")。二是所有的变量必须初始化,否则链接程序会把它放到普通数据段。三是如果不初始化变量,需要在段外用"__declspec(allocate("shareddata")) 变量类型 变量名"的方式定义。 j,7NLb9M  
8#NI`s*  
  DLL中的两个输出函数分别用来添加/删除热键,函数代码如下: qx#k()E.U  
] qT\z<}  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR \\<waU''  
cKey,UCHAR cMask) `jl 1Q,~2r  
{ 2.Kbj^  
 BOOL bAdded=FALSE; Z_%9LxZlyj  
 for(int index=0;index<MAX_KEY;index++){ }zA kUt  
  if(hCallWnd[index]==0){ ' KX'{Gy  
   hCallWnd[index]=hWnd; k-o(Q"[ '  
   HotKey[index]=cKey; q(tdBd'o6  
   HotKeyMask[index]=cMask; () l#}H`m  
   bAdded=TRUE; \>8r)xC  
   KeyCount++; a[Q\8<  
   break; @I\&-Z ^  
  } gEWKM(5B}  
 } fpj,~+  
 return bAdded; QfLDyJv`e  
} &4g]#A>@  
//删除热键 !8cS1(a  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) H l'za  
{ <IiX_*  
 BOOL bRemoved=FALSE; f 7g?{M  
 for(int index=0;index<MAX_KEY;index++){ :?!kZD!  
  if(hCallWnd[index]==hWnd){ .f+ul@o  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ tS$^k)ZXip  
    hCallWnd[index]=NULL; O\=U'6 @  
    HotKey[index]=0; pn},ovR;  
    HotKeyMask[index]=0; "O`{QVg:  
    bRemoved=TRUE; AsBep  
    KeyCount--; *rs@6BSj  
    break; y.KFz9Qv  
   } nEtG(^N  
  } "rV-D1Dki  
 } fn6;  
 return bRemoved; 7/p&]0w  
} wHGiN9A+  
fc}G6P;3{  
HM'P<<  
  DLL中的钩子函数如下: 3['aK|qk.  
};rxpw>ms  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) +/">]QJ  
{ } Mh@%2$  
 BOOL bProcessed=FALSE; O<A$,<67  
 if(HC_ACTION==nCode) Qktj  
 { Dgb@`oo  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 *2K/)(  
   switch(wParam) a4zq`n|3U  
   {  ba=-F4?  
    case VK_MENU: Im7t8XCG  
     MaskBits&=~ALTBIT; RyI(6TZl  
     break; 0?]Y^:  
    case VK_CONTROL: $L~?!u&N  
     MaskBits&=~CTRLBIT; B@v\tpR  
     break; {'.[N79xP  
    case VK_SHIFT: k!{0ku}]  
     MaskBits&=~SHIFTBIT; =F!_ivV  
     break; x,f=J4yco  
    default: //judge the key and send message ^/K]id7 2  
     break; p2v+sWO  
   } 3^ct;gz  
   for(int index=0;index<MAX_KEY;index++){ %kod31X3<  
    if(hCallWnd[index]==NULL) B%~hVpm,eM  
     continue; 5xHP5+&  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) WtT* 1Z  
    { J%_m`?  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); 9Ai e$=  
     bProcessed=TRUE; ; O6Ez-"  
    } pZpAb+  
   } Ec44JD  
  } (\CT "u-  
  else if((lParam&0xc000ffff)==1){ //有键按下 ;oe j~  
   switch(wParam) +[ +4h}?  
   { QD<GXPu?N  
    case VK_MENU: z.NJu q  
     MaskBits|=ALTBIT; YQ\c0XG  
     break; DEdJH4  
    case VK_CONTROL: NU>'$s  
     MaskBits|=CTRLBIT; )<fa1Gz#^  
     break; (qf%,F,_L  
    case VK_SHIFT: |.OXe!uU41  
     MaskBits|=SHIFTBIT; [Pn(d[$z  
     break; -i,=sZXB  
    default: //judge the key and send message C}i1)   
     break; 0QWc1L  
   } v;S_7#  
   for(int index=0;index<MAX_KEY;index++){ q%G"P*g$(  
    if(hCallWnd[index]==NULL) k<bA\5K  
     continue; ?3f-" K_r  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) L7\ rx w  
    { XXx]~m  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); +3;`4bW  
     bProcessed=TRUE; A/WmVv6  
    } ,YEwz3$5u  
   } 2j9+ f{ l  
  } S< TUZ /;  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 ,*y\b|<j  
   for(int index=0;index<MAX_KEY;index++){ .(RX;.lw  
    if(hCallWnd[index]==NULL) Yqpe2II7  
     continue; n54}WGo>9  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) e`N/3q7  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); OMl<=;^:|  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 yvQRr75  
   } NCid`a$  
  } il=:T\'U9  
 } uBr^TM$k&  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); XL10W ^  
} PVNDvUce  
EFd9n  
  抓图程序是一个基于对话框的程序,它在建立对话框的时候调用前面的DLL,登记热键,因此需要将hook.lib添加到工程里,在程序里给出两个DLL函数的定义,也可以写个头文件,再包含进来以下代码: !CnkG<5z>  
)<<}8Fs  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); i4Ps#R_wx  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); &bIE"ZBjt  
LqDj4[}  
  为了添加应用程序对热键通知事件的响应,程序中用的办法是重载WindowProc()函数,该函数代码如下: W7\s=t\  
ji8)/  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) T>$S&U  
{ ^ UB*Q  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) &jbZL5  
 { (IE\}QcK  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 I%8>nMTJ  
  SaveBmp(); ><l|&&e-  
  return FALSE; ;J]Lzh  
 } sQIzcnKB  
 …… //其它处理及默认处理 Vo G`@^s  
} 2r =8&~9z  
\$Jz26 -n  
./Y5Vk#Rp\  
  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。 P+9%(S)L3  
i]8+JG6  
  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。 y3^>a5z!x  
acPX2B[jJ  
  二、编程步骤  D|8Pe{`  
r+yl{  
  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"; wjRv =[  
E1"H( m&6  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; Xb/W[rcs  
R&!{3!V  
  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; ::&hfHR*P  
lDK<gd  
  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 XbMP  
rQrh(~\:  
  5、 添加代码,编译运行程序。 @v:p)|Ne;  
(E*pM$  
三、程序代码 /x2MW5H  
xDsB%~  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL Ig.9:v`  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) o 9?#;B$  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ f@)GiLC'"  
#if _MSC_VER > 1000 3|Vh[iAa\  
#pragma once v\#1&</qd^  
#endif // _MSC_VER > 1000 mO?yrM *  
#ifndef __AFXWIN_H__ saPg2N,  
#error include 'stdafx.h' before including this file for PCH :m{;<LRV  
#endif Bh%Yu*.f  
#include "resource.h" // main symbols ah8xiABa  
class CHookApp : public CWinApp %]KOxaf_z  
{ >3,t`Z:  
 public: 9 M<3m  
  CHookApp(); 2B !Bogs  
  // Overrides  4u.v7r  
  // ClassWizard generated virtual function overrides ;d#`wSF`G  
  //{{AFX_VIRTUAL(CHookApp) i*3*)ly  
 public: +{7/+Zz  
  virtual BOOL InitInstance(); ;_TPJy  
  virtual int ExitInstance(); vIK+18v7  
  //}}AFX_VIRTUAL k~|5TO  
  //{{AFX_MSG(CHookApp) /Y7Yy jMi  
  // NOTE - the ClassWizard will add and remove member functions here. ~4}'R_  
  // DO NOT EDIT what you see in these blocks of generated code ! SI~MTUqt  
  //}}AFX_MSG LOPw0@  
  DECLARE_MESSAGE_MAP() xDtJ& 6uFw  
}; T`Jj$Lue{  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); ej^pFo  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); '|jN!y^ 2p  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); v;_k*y[VV$  
BOOL InitHotkey(); >'MT]@vez  
BOOL UnInit(); 0CtPq`!  
#endif o;^k"bo6   
=]Vrl-a`^  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. Q=}U  
#include "stdafx.h" Nfdh0v  
#include "hook.h" o'hwyXy/S  
#include <windowsx.h> [\|p~Qb)s  
#ifdef _DEBUG P&2/J%@zG  
#define new DEBUG_NEW g"P!KPrf1p  
#undef THIS_FILE 4Ww.CkRG  
static char THIS_FILE[] = __FILE__; j3kcNb  
#endif D( YNa  
#define MAX_KEY 100 :OFL@byS  
#define CTRLBIT 0x04 4^>FN"Ve`B  
#define ALTBIT 0x02 7c7:B2Lq  
#define SHIFTBIT 0x01 ?_<14%r;  
#pragma data_seg("shareddata") !I UH 5  
HHOOK hHook =NULL; :TTZ@ q  
UINT nHookCount =0; u@ psVt   
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey s${|A =  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT ,!{/Y7PmJ  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey $Lf-Gi  
static int KeyCount =0; rT}k[  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift :"utFBO  
#pragma data_seg() Obl,Qa:5  
HINSTANCE hins; "n Zh u k  
void VerifyWindow(); B]C 9f  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) YH .+(tNv  
//{{AFX_MSG_MAP(CHookApp) YYzl"<)c  
// NOTE - the ClassWizard will add and remove mapping macros here. zo{WmV7[|  
// DO NOT EDIT what you see in these blocks of generated code! z}sBx 9;  
//}}AFX_MSG_MAP 8`4Z%;1  
END_MESSAGE_MAP() 8<w8"B.i  
Y7L1`<SC  
CHookApp::CHookApp() ex}6(;7)O  
{ X61p xPa  
 // TODO: add construction code here, fg8"fbG`:  
 // Place all significant initialization in InitInstance =w#sCy  
} uz8Y)b  
1|8<!Hx#-  
CHookApp theApp; x*}*0).  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) omEnIfQSO  
{ 5kju{2`GF  
 BOOL bProcessed=FALSE; d#OE) ,`  
 if(HC_ACTION==nCode) d_r1 }+ao  
 { ^7zXi xp  
  if((lParam&0xc0000000)==0xc0000000){// Key up 54geU?p0  
   switch(wParam) '*XX|\.  
   { g,,'Pdd7Pn  
    case VK_MENU: {;0+N -U  
     MaskBits&=~ALTBIT; ? 016  
     break; tPb$ua|  
    case VK_CONTROL: B[8`l} t  
     MaskBits&=~CTRLBIT; rcx'`CIJ  
     break; F\"`^`(O  
    case VK_SHIFT: cf7UV6D g  
     MaskBits&=~SHIFTBIT; hCX_^%  
     break; < `/22S"  
    default: //judge the key and send message 'A}@XGE:p  
     break; ^]A,Q%1q^  
   } $^XCI%DH  
   for(int index=0;index<MAX_KEY;index++){ {G^f/%  
    if(hCallWnd[index]==NULL) P+j5_V{\b  
     continue; q4wS<, 3  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) XzH"dDAVE  
    { LE1#pB3TG  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); F]4JemSjK  
     bProcessed=TRUE; QT\=>,Fz _  
    } o[ua$+67E  
   } kbHfdA  
  } f(r=S Xa*  
  else if((lParam&0xc000ffff)==1){ //Key down )t#v55M  
   switch(wParam) ja_.{Zv  
   { WU" Lu  
    case VK_MENU: ha -KfkPFE  
     MaskBits|=ALTBIT; `ywI+^b  
     break; )rce%j7  
    case VK_CONTROL: ztRe\(9bL  
     MaskBits|=CTRLBIT; ),u)#`.l G  
     break; (aQNe{D#  
    case VK_SHIFT: },W<1*|  
     MaskBits|=SHIFTBIT; <RFT W}f!  
     break; Dno'-{-  
    default: //judge the key and send message `uN}mC!r]  
     break; #@cOyxUt  
   } HL*Fs /W  
   for(int index=0;index<MAX_KEY;index++) /`b(} m  
   { 2xx  
    if(hCallWnd[index]==NULL) q]qKU`m!Q`  
     continue; {|Pg]#Wi&  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) \F }s"#  
    { + yF._Ie=  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); `1T?\  
     bProcessed=TRUE; -? |-ux  
    } Oz: J8l%  
   } #,4CeD|(D,  
  } zK P{A Sk  
  if(!bProcessed){ GOII B  
   for(int index=0;index<MAX_KEY;index++){ [|)Eyd[G  
    if(hCallWnd[index]==NULL) X4bB  
     continue; 8FmRD  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) n=+K$R  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); U fzA/  
   } F z 6&.f  
  } W_sAk~uK/  
 } |~y>R#u8pm  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); IB sQaxt.  
} <:t D m  
e/{1u$  
BOOL InitHotkey() !jIpgs5  
{ S=R}#  
 if(hHook!=NULL){ qyx  '  
  nHookCount++; OK6c"*<z  
  return TRUE; #w *]`5 T  
 } .-[d6Pnw  
 else ha%3%O8Z  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); mK>c+ u)  
  if(hHook!=NULL) yl#(jb[?1  
   nHookCount++; 5^}"Tn4I  
  return (hHook!=NULL); Z|h&Zd1z  
} =mq02C~y  
BOOL UnInit() e9 `n@  
{ Uo7V)I;o  
 if(nHookCount>1){ M2.Pf s  
  nHookCount--; D@]*{WO  
  return TRUE; {r$n $  
 } fF"\$Ny  
 BOOL unhooked = UnhookWindowsHookEx(hHook); <A_LZi  
 if(unhooked==TRUE){ Gh:hfHiG  
  nHookCount=0; r@XH=[:  
  hHook=NULL; ?<l,a!V'6  
 } z'(][SB  
 return unhooked; #RG/B2  
} )0Lno|l  
*_aeK~du.  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) x2KIGG ^  
{ O$2'$44HX  
 BOOL bAdded=FALSE; b\dzB\,&  
 for(int index=0;index<MAX_KEY;index++){ >H*?ktcW  
  if(hCallWnd[index]==0){ F_?aoP&5  
   hCallWnd[index]=hWnd; 20O\@}2q2M  
   HotKey[index]=cKey; 'rX!E,59  
   HotKeyMask[index]=cMask; ~`<(T)rs  
   bAdded=TRUE; 6;:s N8M+1  
   KeyCount++; xjplJ'jB  
   break; m-M.F9R  
  } nisW<Q`uB  
 } vwlPFr Ll  
 return bAdded; dC F!.  
} x P3v65Q1  
}aPx28:/  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) FBR]) h'Z  
{ xux j  
 BOOL bRemoved=FALSE; W 6d[v/+K+  
 for(int index=0;index<MAX_KEY;index++){ sI7<rI.t){  
  if(hCallWnd[index]==hWnd){ K)z! e;r  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ R`_RcHY:  
    hCallWnd[index]=NULL; RbY=O OQ  
    HotKey[index]=0; O!3MXmaO  
    HotKeyMask[index]=0; bm &$wf  
    bRemoved=TRUE; vp4l g1/  
    KeyCount--; EEU)eltI  
    break; EqN_VT@  
   } RP"YSnF3  
  } CPw=?<db  
 } m~LB0u$ac  
 return bRemoved; 4l7FV<g  
} zJ*|tw4  
 u Z(vf  
void VerifyWindow() rfl-(_3  
{ @-7h}2P Q  
 for(int i=0;i<MAX_KEY;i++){ )YB @6TiD  
  if(hCallWnd!=NULL){ LFi8@  
   if(!IsWindow(hCallWnd)){ F@76V$U.  
    hCallWnd=NULL; c%5G3j  
    HotKey=0;  &Ow[  
    HotKeyMask=0; z/B[quSio  
    KeyCount--; aQMUC6cPM@  
   } Jvk!a~e  
  } w;LIP!T#  
 } 'T8(md299  
} D9cpw0{nc  
.+;;-]})  
BOOL CHookApp::InitInstance() Y"x9B%e  
{ gCVgL]jj(  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); y)s+/Teb  
 hins=AfxGetInstanceHandle(); *~t&Ux#hj  
 InitHotkey(); vy <(1\  
 return CWinApp::InitInstance(); <3[,bTIk  
} Y [hTO.LF  
yBd#*3K1  
int CHookApp::ExitInstance() U]aH4 N  
{ K>"]*#aBv  
 VerifyWindow(); GW]b[l  
 UnInit(); }# ~DX!Sj  
 return CWinApp::ExitInstance(); Fp_?1 y  
} !`3q9RT3."  
W+F^(SC\  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file , ;'y <GA  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) )} I>"n  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ )2Ru} -H  
#if _MSC_VER > 1000 N^)\+*tf1  
#pragma once d)_fI*:f  
#endif // _MSC_VER > 1000 Rh[%UNl  
_y,? Cj=u|  
class CCaptureDlg : public CDialog Nq$Xe~,*  
{ q_h=O1W  
 // Construction ^7q qO%  
 public: #- l1(m  
  BOOL bTray; +@U}gk;#c  
  BOOL bRegistered;  rq[+p  
  BOOL RegisterHotkey(); d]89DdZk  
  UCHAR cKey; )_m#|U?Rex  
  UCHAR cMask; f1hjU~nJ  
  void DeleteIcon(); zNZ"PYh<u  
  void AddIcon(); j}uVT2ZE%  
  UINT nCount; *J ]2"~_.  
  void SaveBmp(); C J@G8>  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor Rxg ^vM*  
  // Dialog Data l*v6U'J  
  //{{AFX_DATA(CCaptureDlg) TA2?Ia;@xV  
  enum { IDD = IDD_CAPTURE_DIALOG }; t_VF=B^LuR  
  CComboBox m_Key; SuO@LroxTB  
  BOOL m_bControl; 7$z]oVbO'  
  BOOL m_bAlt; &<oZl.T  
  BOOL m_bShift; ([mC!d@a  
  CString m_Path; \:'|4D]'I  
  CString m_Number; a2'si}'3  
  //}}AFX_DATA ^an3&  
  // ClassWizard generated virtual function overrides Gkc.HFn(  
  //{{AFX_VIRTUAL(CCaptureDlg) *dTI4k  
 public: o7qZy |\4S  
  virtual BOOL PreTranslateMessage(MSG* pMsg); 7U@;X~c  
 protected: U_X/  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support w7(jSPB  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); 1x"S^j   
  //}}AFX_VIRTUAL I6q]bQ="  
  // Implementation jm~qD T,  
 protected: STr&"9c  
  HICON m_hIcon; zKnHo:SV  
  // Generated message map functions %, U@ D4w  
  //{{AFX_MSG(CCaptureDlg) 55mDLiA  
  virtual BOOL OnInitDialog(); l"C)Ia&/  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); m(B,a,g<  
  afx_msg void OnPaint(); & V*_\  
  afx_msg HCURSOR OnQueryDragIcon(); +d$l1j  
  virtual void OnCancel(); ls^| j%$J  
  afx_msg void OnAbout(); Y[0  
  afx_msg void OnBrowse(); 7sC8|+  
  afx_msg void OnChange(); $@ous4&  
 //}}AFX_MSG uT#MVv~.  
 DECLARE_MESSAGE_MAP() wDL dmrB  
}; K}r@O"6*\  
#endif |i}5vT78  
_ ?\4k{ET  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file O%>FKU>(?  
#include "stdafx.h" ggy 7p44  
#include "Capture.h" `T-lBwH  
#include "CaptureDlg.h" ,h#U<CnP#  
#include <windowsx.h> 7%%FYHMO:  
#pragma comment(lib,"hook.lib") "K!9^!4&  
#ifdef _DEBUG ZRK1 UpP  
#define new DEBUG_NEW Fz3QSr7FU  
#undef THIS_FILE iG.qMf.  
static char THIS_FILE[] = __FILE__; na%DF@Rt#  
#endif !6yyX}%o  
#define IDM_SHELL WM_USER+1 r8k.I4  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); viLK\>>  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); Ot^<:\< `G  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; A`H&" A  
class CAboutDlg : public CDialog ]tu:V,q  
{ o#X=1us  
 public: *Dz<Pi^  
  CAboutDlg(); 'QMvj` -  
  // Dialog Data jn+M L&  
  //{{AFX_DATA(CAboutDlg) kW 7 $  
  enum { IDD = IDD_ABOUTBOX }; ';CL;A;  
  //}}AFX_DATA ? >\JX  
  // ClassWizard generated virtual function overrides A3!xYG=+  
  //{{AFX_VIRTUAL(CAboutDlg) :epjJ1mW  
 protected: 9rCvnP=  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support ITq$8  
  //}}AFX_VIRTUAL _6"YWR  
  // Implementation Y!+q3`-%T  
 protected: q%RPA e  
  //{{AFX_MSG(CAboutDlg) E&RiEhuv  
  //}}AFX_MSG 0Xke26ga  
  DECLARE_MESSAGE_MAP() " iKX-VIl  
}; TqZ&X| G  
DaK2P;WP  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) PCx] >&  
{ |, Lp1  
 //{{AFX_DATA_INIT(CAboutDlg) cc$L56q  
 //}}AFX_DATA_INIT W,g0n=2V  
} HZG<aY="  
.t7mTpi  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) !Q0aKkMfL  
{ '(qVA>S  
 CDialog::DoDataExchange(pDX); ,o_Ur.UJ  
 //{{AFX_DATA_MAP(CAboutDlg) Py3Y*YP  
 //}}AFX_DATA_MAP k *#fN(_  
} z1WF@ Ej  
clcj5=:  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) 4)IRm2G  
 //{{AFX_MSG_MAP(CAboutDlg) %"1*,g{  
 // No message handlers MmvMuX]#)  
 //}}AFX_MSG_MAP qM|-2Zl!+  
END_MESSAGE_MAP() cSkJlhwNn  
}'FNGn.~#  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) C8J3^ ?7E  
: CDialog(CCaptureDlg::IDD, pParent) >`@c9 m  
{ tR;? o,T  
 //{{AFX_DATA_INIT(CCaptureDlg) +( *;F4>  
  m_bControl = FALSE; itp$c|{  
  m_bAlt = FALSE; :Hn*|+'  
  m_bShift = FALSE; ^LO`6,   
  m_Path = _T("c:\\"); \k8|3Y~g  
  m_Number = _T("0 picture captured."); rl <! h5  
  nCount=0; d- wbZ)BR  
  bRegistered=FALSE; &>0ape  
  bTray=FALSE; +mr\AAFn  
 //}}AFX_DATA_INIT @`hnp:  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 JLZ[sWP='  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); ~I+}u]J  
} q,W6wM;,E  
*>ilT5q  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) w^.^XK4v.  
{ t]j4PNzn  
 CDialog::DoDataExchange(pDX); @ k`^Z5tN  
 //{{AFX_DATA_MAP(CCaptureDlg) Dn}Wsd=  
  DDX_Control(pDX, IDC_KEY, m_Key); !JkH$~  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); |<YoH$.  
  DDX_Check(pDX, IDC_ALT, m_bAlt); X~H ~k1  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); 77:s=)   
  DDX_Text(pDX, IDC_PATH, m_Path); TC2gl[  
  DDX_Text(pDX, IDC_NUMBER, m_Number); v7L} I[f  
 //}}AFX_DATA_MAP 5_d=~whO&2  
} [CfA\-gx<f  
=> PBdW  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) * MJl(  
//{{AFX_MSG_MAP(CCaptureDlg) @k~_ w#  
 ON_WM_SYSCOMMAND() }iK_7g`yKa  
 ON_WM_PAINT() pxF<L\L?:  
 ON_WM_QUERYDRAGICON() E8:4Z$|c  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) *@C4~Zo  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) ~[|zf*ZISG  
 ON_BN_CLICKED(ID_CHANGE, OnChange) jv"^_1  
//}}AFX_MSG_MAP V&' :S{i  
END_MESSAGE_MAP() =Wl*.%1 b  
)ny,vcU]  
BOOL CCaptureDlg::OnInitDialog() LGOeBEAMV^  
{ T}?vp~./   
 CDialog::OnInitDialog(); OZw<YR  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); bwo{ Lw~  
 ASSERT(IDM_ABOUTBOX < 0xF000); m-~eCFc  
 CMenu* pSysMenu = GetSystemMenu(FALSE); (f5v{S6b(  
 if (pSysMenu != NULL) e|L$e0  
 { X@ljZ  
  CString strAboutMenu; CQq'x +{F  
  strAboutMenu.LoadString(IDS_ABOUTBOX); Tz=YSQy$9  
  if (!strAboutMenu.IsEmpty()) }x[d]fcC  
  { A5lP%&tu(  
   pSysMenu->AppendMenu(MF_SEPARATOR); xTnd9'Pk`:  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); @;-6qZ  
  } (N etn&  
 } %7_c|G1  
 SetIcon(m_hIcon, TRUE); // Set big icon #$vef  
 SetIcon(m_hIcon, FALSE); // Set small icon CKAs3",  
 m_Key.SetCurSel(0); Kp|#04]  
 RegisterHotkey(); . k6)  
 CMenu* pMenu=GetSystemMenu(FALSE); H& #Od?  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); H3#xBn>9  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); -V'`;zE6  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); yqg&dq  
 return TRUE; // return TRUE unless you set the focus to a control No\H QQ  
} [ imC21U  
,sAN,?eG~  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) F4m Q#YlrS  
{ LE15y>  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) xLE+"6;W  
 { U`j[Ni}"  
  CAboutDlg dlgAbout; cU y,q]PO  
  dlgAbout.DoModal(); [_3Rhp:  
 } A2` QlhZ  
 else bb6 ~H  
 { ;|2h&8yX(/  
  CDialog::OnSysCommand(nID, lParam); sP0pw]!  
 } dBV^Khf J  
} x 5u.D^  
C +-<  
void CCaptureDlg::OnPaint() gyW*-:C  
{ @17hB h  
 if (IsIconic()) q2I;Ly\3o  
 { )P^5L<q>|  
  CPaintDC dc(this); // device context for painting (8!#<$  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); iL-I#"qT,  
  // Center icon in client rectangle eJMD8#  
  int cxIcon = GetSystemMetrics(SM_CXICON); E)Z$7;N0x  
  int cyIcon = GetSystemMetrics(SM_CYICON); 8ycmvpJ  
  CRect rect; )shzJ9G  
  GetClientRect(&rect); O<R6^0B42  
  int x = (rect.Width() - cxIcon + 1) / 2; x M1>kbo|  
  int y = (rect.Height() - cyIcon + 1) / 2; tQ7DdVdix  
  // Draw the icon gT K5z.]  
  dc.DrawIcon(x, y, m_hIcon); 7Q<uk[d0  
 } +uF!.!}  
 else ~Od4( }/G  
 { Sx,O)  
  CDialog::OnPaint(); :E|HP#iwu  
 } 1i}Rc:  
} k'N `5M)  
U! F~><  
HCURSOR CCaptureDlg::OnQueryDragIcon() b$sw`Rsw  
{ \/jr0):  
 return (HCURSOR) m_hIcon; r)|X?   
} &jgpeFiiC  
8#%p[TLj  
void CCaptureDlg::OnCancel() $+IE`(Ckf  
{ z8 bDBoD6  
 if(bTray) q+{-p?;;  
  DeleteIcon(); U[zY0B  
  CDialog::OnCancel(); Sti)YCXH  
} yQ4]LyS  
K\&A}R  
void CCaptureDlg::OnAbout() {xw*H<"f<  
{ '0|AtO77  
 CAboutDlg dlg; NF1e>O:a<  
 dlg.DoModal(); @GGzah#  
} 9l+`O0.@  
QD LXfl/  
void CCaptureDlg::OnBrowse() 9&A-o  
{ %zHNX4  
 CString str; ^4Ra$<  
 BROWSEINFO bi; U,C L*qTF  
 char name[MAX_PATH]; ,\;;1Kq  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); 'Y+AU#1~H  
 bi.hwndOwner=GetSafeHwnd(); O6P0Am7s  
 bi.pszDisplayName=name; +dm&XW >  
 bi.lpszTitle="Select folder"; pmyHto"  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; p6[a"~y  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); pN<wO1\9  
 if(idl==NULL) \4wM8j  
  return; sk~rjH]-g$  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); B&0^3iKFi  
 str.ReleaseBuffer(); b .k J&c  
 m_Path=str; 65VnH=  
 if(str.GetAt(str.GetLength()-1)!='\\') Ebp^-I9.d  
  m_Path+="\\"; 8NJ(l  
 UpdateData(FALSE); 2 [a#wz'  
} TH2D;uv  
.+7GecYz  
void CCaptureDlg::SaveBmp() %R5APMg1  
{ vy#n7hdCc  
 CDC dc; wKhuUZj{  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); 4KE"r F  
 CBitmap bm; lIO.LF3  
 int Width=GetSystemMetrics(SM_CXSCREEN); R2Fh WiL  
 int Height=GetSystemMetrics(SM_CYSCREEN); [7?K9r\#  
 bm.CreateCompatibleBitmap(&dc,Width,Height); KyW6[WA9  
 CDC tdc; 3%m2$\  
 tdc.CreateCompatibleDC(&dc); yk Sn=0  
 CBitmap*pOld=tdc.SelectObject(&bm); 5O&6 (Gaf  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); cbl@V 1  
 tdc.SelectObject(pOld); zp r`  
 BITMAP btm; <Mo_GTOC!  
 bm.GetBitmap(&btm); ]{V q;  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; ~oI7TP  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); Vb06z3"r  
 BITMAPINFOHEADER bih; T#^   
 bih.biBitCount=btm.bmBitsPixel; >#B%gxff  
 bih.biClrImportant=0; gd[jYej'RP  
 bih.biClrUsed=0; KotJ,s]B  
 bih.biCompression=0; C>Qgd9  
 bih.biHeight=btm.bmHeight; EA%(+tJ^0  
 bih.biPlanes=1; E;~gQ6vAI  
 bih.biSize=sizeof(BITMAPINFOHEADER); Qvs}{h/  
 bih.biSizeImage=size; ,+P!R0PNH  
 bih.biWidth=btm.bmWidth; o=?sMq1<  
 bih.biXPelsPerMeter=0; OA2<jrGB!  
 bih.biYPelsPerMeter=0; } ab@Nd$  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); PygT_-3z{  
 static int filecount=0; y]9 3z!#Z  
 CString name; m/n_e g  
 name.Format("pict%04d.bmp",filecount++); dg 0`0k  
 name=m_Path+name; z %` \p  
 BITMAPFILEHEADER bfh; T%K(opISc(  
 bfh.bfReserved1=bfh.bfReserved2=0; XJsHy_6  
 bfh.bfType=((WORD)('M'<< 8)|'B'); =)m2u2c M  
 bfh.bfSize=54+size; $<2r;'?0D  
 bfh.bfOffBits=54; |c,":R  
 CFile bf; STs~GOm-  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ JpE4 o2  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); zJ7vAL  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); `@ULG>   
  bf.WriteHuge(lpData,size); "aK3 ylz;  
  bf.Close(); DDn@M|*$  
  nCount++; j$^3  
 } K+xiov-r?  
 GlobalFreePtr(lpData); a ^<W ?Z  
 if(nCount==1) =:[Jz1M5  
  m_Number.Format("%d picture captured.",nCount); WV!qG6\W  
 else Rj9z '?a9  
  m_Number.Format("%d pictures captured.",nCount); )I{41/_YA  
  UpdateData(FALSE); 4x.'H18  
} *PE 1)bF  
X>EwJ"q#  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) Jt"0|+g|  
{ !>-cMI6E  
 if(pMsg -> message == WM_KEYDOWN) 0P sp/H%  
 { mq$'\c 9.  
  if(pMsg -> wParam == VK_ESCAPE) -0PT(gx  
   return TRUE; ~YOwg\w^  
  if(pMsg -> wParam == VK_RETURN) BFt?%E/]  
   return TRUE; B#AAG*Ai8  
 } |r1\  
 return CDialog::PreTranslateMessage(pMsg); n[lf==R  
} !HL7a]PB  
szMh}q"u  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) LYNd^}  
{ :U)q(.53  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ \%=\_"^?  
  SaveBmp(); ln)_Jf1r  
  return FALSE; q17c)]<"  
} r]Bwp i%  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ :}TT1@  
 CMenu pop; ej>8$^y  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); q$e2x=?  
 CMenu*pMenu=pop.GetSubMenu(0); u_s  
 pMenu->SetDefaultItem(ID_EXITICON); v'Gqdd-#)  
 CPoint pt; 9kL'"0c  
 GetCursorPos(&pt); Ra<mdteZT  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); 9r@r\-  
 if(id==ID_EXITICON) :pcKww|V  
  DeleteIcon(); /E$"\md  
 else if(id==ID_EXIT) jFpXTy[>  
  OnCancel(); 6UR.,*f=  
 return FALSE; dG}fpQ3&  
} 7(^<Z5@  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); G!T)V2y  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) zg2A$Fd[j  
 AddIcon(); Oyhl*`-*t  
 return res; [>::@[  
} _aL:XKM  
^RrufwUA  
void CCaptureDlg::AddIcon() OaRtGJnR  
{ Q*Per;%J  
 NOTIFYICONDATA data; #ebT$hf30  
 data.cbSize=sizeof(NOTIFYICONDATA); @FIR9XJ  
 CString tip; ug0[*#|Y  
 tip.LoadString(IDS_ICONTIP); =K .'x  
 data.hIcon=GetIcon(0); 6tB-  
 data.hWnd=GetSafeHwnd(); z6S N  
 strcpy(data.szTip,tip); q3JoU/Sf  
 data.uCallbackMessage=IDM_SHELL; EC$wi|i  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; p}_bu@;.Z  
 data.uID=98; {^>m3  
 Shell_NotifyIcon(NIM_ADD,&data); JYOyz+wNd  
 ShowWindow(SW_HIDE); ) Yz` 6  
 bTray=TRUE; S*Un$ngAh  
} yd[}?  
D{I^_~-\5  
void CCaptureDlg::DeleteIcon() lidzs<W-fW  
{ RxU6.5N  
 NOTIFYICONDATA data; YFOSv]w  
 data.cbSize=sizeof(NOTIFYICONDATA); iJIPH>UMX  
 data.hWnd=GetSafeHwnd(); !/ TeTmo  
 data.uID=98; q0{KYWOvk  
 Shell_NotifyIcon(NIM_DELETE,&data); hL~@Ah5&t  
 ShowWindow(SW_SHOW); nzE4P3 C+  
 SetForegroundWindow(); v' .:?9  
 ShowWindow(SW_SHOWNORMAL); _%w-y(Sqn  
 bTray=FALSE; Xg?hh 0s  
} S9J<3 =  
frbKi _1  
void CCaptureDlg::OnChange() ZXljCiNn+\  
{ GLQ1rT  
 RegisterHotkey(); JDfkm+}uY  
} |4aV~n[>#  
f!a[+^RB:  
BOOL CCaptureDlg::RegisterHotkey() Q ,30  
{ zg+78  
 UpdateData(); N[d*_KN.!  
 UCHAR mask=0; [ \ LA  
 UCHAR key=0; f;`pj`-k%  
 if(m_bControl) zm) ]cq  
  mask|=4; db$Th=s[  
 if(m_bAlt) zvYkWaa_Qz  
  mask|=2; xu(5U`K  
 if(m_bShift) L0ig%  
  mask|=1; E ;65kZ  
  key=Key_Table[m_Key.GetCurSel()]; y[Zl,v7  
 if(bRegistered){ z:-a7_   
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); _O2},9L n  
  bRegistered=FALSE; K,bv\j;f  
 } UhYeyT  
 cMask=mask; U(3+*'8r,1  
 cKey=key; /+pbO-rW*  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); I>o+INb:  
 return bRegistered; d a we!w!  
} vpcx 1t<  
rM#jxAb  
  四、小结 6js94ko[  
8o#*0d|  
  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