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
  • 6609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: rVU::C+-  
  y_bb//IAG  
  一、实现方法 o#wDA0T  
6ybpPls  
  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: >_9w4g_<  
[d+f#\ut  
#pragma data_seg("shareddata") -*;-T9  
HHOOK hHook =NULL; //钩子句柄 *aKT&5Ch-  
UINT nHookCount =0; //挂接的程序数目 g]B! 29M  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 0<3)K[m~H  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 |)4Fe/!cJ  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey R2uekpP  
static int KeyCount =0; R0>GM`{  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 3N8RZt1.b  
#pragma data_seg() &_mOw.  
j*uc$hC"  
  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。 `?Wy;5-  
!1+yb.{\  
  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: KjK.Sv{N  
~";GH20  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR :G+8%pUX]  
cKey,UCHAR cMask) fJ \bm  
{ $]eU'!2)  
 BOOL bAdded=FALSE; ^HpUbZpat)  
 for(int index=0;index<MAX_KEY;index++){ [ 0? *J<d  
  if(hCallWnd[index]==0){ :by EXe;3  
   hCallWnd[index]=hWnd; #=~n>qn]  
   HotKey[index]=cKey; @=@7Uu-  
   HotKeyMask[index]=cMask; a`]Dmw8@  
   bAdded=TRUE; BEn,py7  
   KeyCount++; Q a(>$.h  
   break; k%UE^  
  } !JZ)6mtlr  
 } U Ke!zI  
 return bAdded; 3yT7;~vPj  
} 6y;R1z b  
//删除热键 bUR; d78  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) O3Jp:.ps  
{ yXg #<H6V  
 BOOL bRemoved=FALSE; DI/yHs  
 for(int index=0;index<MAX_KEY;index++){ 5i 56J1EC  
  if(hCallWnd[index]==hWnd){ QFn .<@  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ R $vo  
    hCallWnd[index]=NULL; @m*^v\q<u  
    HotKey[index]=0; J!l/!Z>!cF  
    HotKeyMask[index]=0; }= )  
    bRemoved=TRUE; zCOzBL/1q  
    KeyCount--; g\%vkK&I  
    break; D]NfA2B7  
   } ,MH9e!  
  } 9 U6cM-p?  
 } 1+P&O4>  
 return bRemoved; 9~AAdD  
} kB41{Y -  
Qfx:}zk{  
lLq9)+HGN  
  DLL中的钩子函数如下: 7m{YWR0  
_0Mt*]L }  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) ^SdorPOq&  
{ ==$>M d  
 BOOL bProcessed=FALSE; Yh=/?&*  
 if(HC_ACTION==nCode) tvh)N{j  
 { 2(5HPRQ  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 #dcfQ  
   switch(wParam) /uXEh61$8  
   {  Kwc~\k  
    case VK_MENU: Tnw0S8M  
     MaskBits&=~ALTBIT; N{6 - rR  
     break; $:v!*0/  
    case VK_CONTROL: (<|NerwD  
     MaskBits&=~CTRLBIT; |$Y0VC4a  
     break; _*(n2'2B  
    case VK_SHIFT: 9d4Agj M  
     MaskBits&=~SHIFTBIT; 0~.OMG:=  
     break; x  RV@ _  
    default: //judge the key and send message }Xn5M&>?  
     break; Yv}V =O%  
   } pf_(?\oz>  
   for(int index=0;index<MAX_KEY;index++){ LV$@J  
    if(hCallWnd[index]==NULL) :BIgrz"Jz  
     continue; 7od6`k   
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) %hEhZW{:  
    { Oy> V/  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); $Tc"7nYu  
     bProcessed=TRUE; W{z7h[?5,  
    } !F@9xG  
   } 5e> <i  
  } !G`7T  
  else if((lParam&0xc000ffff)==1){ //有键按下 e.8(tEqZ1  
   switch(wParam) ]`p*ZTr)\  
   { *)+K+J  
    case VK_MENU: 8OYw72&  
     MaskBits|=ALTBIT; 3B{B6w}t&  
     break; V(-=@UW  
    case VK_CONTROL: @Yv+L)  
     MaskBits|=CTRLBIT; *3,Kn}ik  
     break; fT:a{  
    case VK_SHIFT: g\Ck!KJ/y  
     MaskBits|=SHIFTBIT; -+#QZ7b  
     break; Vh%=JL sK  
    default: //judge the key and send message :$=r^LSH  
     break;  4[\[Ho  
   } WfnBWSA2 T  
   for(int index=0;index<MAX_KEY;index++){ 5*Wo/%#q  
    if(hCallWnd[index]==NULL) dnZA+Pa  
     continue; =wd=TX/  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) $)V_oQSqn  
    { ,qo"i7c{:  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); Wmm'j&hI  
     bProcessed=TRUE; ,5tW|=0@  
    } m^6& !`CD  
   } -Fl;;jeX  
  } y@\R$`0J  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 8&gr}r- 5  
   for(int index=0;index<MAX_KEY;index++){ #n9:8BKf  
    if(hCallWnd[index]==NULL) .BaU}-5  
     continue; )Ha`>  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) "4 Lt:o4x  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); Qxw?D4/Y  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 , [V#o-Z  
   } %xa.{`}`U  
  } XOk0_[  
 } x/Nh9hh"  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); ]HpKDb0+  
} HAkEJgV  
C`p)S`d  
  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: BtPUUy.  
7q%<JZPY  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); !uoQLiH+  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); zvzS$Gpe  
$]{20"  
  为了添加应用程序对热键通知事件的响应,程序中用的办法是重载WindowProc()函数,该函数代码如下: &zGf`Zi6*%  
Nb[zm|.  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) R:Pw@  
{ #Tr>[ZC  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) _ct18nh9  
 { oNk ASAd  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 V>8)1)dF  
  SaveBmp(); "kYzgi  
  return FALSE; Y,?!"  
 } CG`s@5y>5  
 …… //其它处理及默认处理 __F?iRrCM  
} eU[f6OGqC  
f{} zqCK  
>u6*P{;\  
  将屏幕图像保存到BMP文件中的任务是由函数SaveBmp()来完成的,具体实现参见代码部分。另外为了顺利实现屏幕抓图,程序中还实现了"托盘"功能,由于这一部分本书在实例中已经专门介绍过了,所以不再赘述,读者朋友可以参考相关实例。 R a> k#pQ  
:^G;`T`L  
  最后需要提醒读者朋友们注意的是,源程序的编译与使用时要先编译hook.dll并将其放在系统目录(win2000/NT是system32,98/ME是system),然后编译对话框程序运行即可。 |^uU&O;.  
lur$?_gt  
  二、编程步骤 m'L7K K-Y)  
'aq9]D_k  
  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"; $r>\y (W  
lphELPh  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; \0{g~cU4  
2 /rDi  
  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; $p(,Qz(.8  
\[nvdvJv  
  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; NXJyRAJ*%  
G>3]A5  
  5、 添加代码,编译运行程序。 -G!W6$Y  
@[:JQ'R=  
三、程序代码 u{H'evv0O  
=p1aF/1$I  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL zF%'~S0{  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) -{ae  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ aMUy^>  
#if _MSC_VER > 1000 eHjna\C  
#pragma once 't3@dz_dG  
#endif // _MSC_VER > 1000 W7j-siWJ  
#ifndef __AFXWIN_H__ -T s8y  
#error include 'stdafx.h' before including this file for PCH &~%( RO  
#endif n@hf{hA[a  
#include "resource.h" // main symbols Fj0a+r,h!  
class CHookApp : public CWinApp rO_|_nV[  
{ r`; "  
 public: 01/?  
  CHookApp(); 4yk!T  
  // Overrides x/7d!>#;  
  // ClassWizard generated virtual function overrides P ~pC /z  
  //{{AFX_VIRTUAL(CHookApp) N@oNg}D&:  
 public: 7]i=eD8  
  virtual BOOL InitInstance(); X_j=u1*5  
  virtual int ExitInstance(); 3eqVY0q  
  //}}AFX_VIRTUAL vlHE\%{  
  //{{AFX_MSG(CHookApp) x6d0yJ <  
  // NOTE - the ClassWizard will add and remove member functions here. h`_@eax  
  // DO NOT EDIT what you see in these blocks of generated code ! @V9qbr= Z  
  //}}AFX_MSG TQcEe@$)  
  DECLARE_MESSAGE_MAP() h-^7cHI}  
}; /c`s$h4-  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); 1z4s1 Y  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); .g|D  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); \:ELO[(#|{  
BOOL InitHotkey(); r*n_#&-7  
BOOL UnInit(); :3FJe  
#endif qkM<t?uS  
x vi&d1  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. yf2I%\p}  
#include "stdafx.h" DeMF<)#  
#include "hook.h" +npcU:(Kg  
#include <windowsx.h> c|kQ3(  
#ifdef _DEBUG EmaVd+Sw  
#define new DEBUG_NEW 5M.KF;P  
#undef THIS_FILE c:a5pd7T  
static char THIS_FILE[] = __FILE__; a^9-9*  
#endif !PaDq+fB  
#define MAX_KEY 100 :+Pl~X"_  
#define CTRLBIT 0x04 D^ E+#a 1  
#define ALTBIT 0x02 \F|L y >g  
#define SHIFTBIT 0x01 A[,[j?wC  
#pragma data_seg("shareddata") m&'z|eN  
HHOOK hHook =NULL; x J;DkPh  
UINT nHookCount =0; o9tvf|+z  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey 4_#y l9+  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT <lx~/3<m  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey $] js0 )>  
static int KeyCount =0; a"!D @a  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift hb6UyN  
#pragma data_seg() uq}>5  
HINSTANCE hins; Hkc:B/6  
void VerifyWindow(); B!Ss 35<  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) e[3 rz%'Q  
//{{AFX_MSG_MAP(CHookApp) ozs xqN  
// NOTE - the ClassWizard will add and remove mapping macros here. %-Z0OzWe  
// DO NOT EDIT what you see in these blocks of generated code! y=L9E?  
//}}AFX_MSG_MAP Lv;R8^n  
END_MESSAGE_MAP() W^c> (d</  
Eua\N<!aai  
CHookApp::CHookApp() qR W WG&  
{ $X.X_  
 // TODO: add construction code here, }y-b<J ?H  
 // Place all significant initialization in InitInstance 39W"G7n?v  
} HiBw==vlV  
mSWh'1]b.~  
CHookApp theApp; UuV<#N)  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) GC{)3)_ t  
{ T~nmEap  
 BOOL bProcessed=FALSE; zh hH A9  
 if(HC_ACTION==nCode) 1U"Fk3  
 { s W#}QYd  
  if((lParam&0xc0000000)==0xc0000000){// Key up yDt3)fP#  
   switch(wParam) GEg8\  
   { XO)|l8t#$=  
    case VK_MENU: DA[s k7  
     MaskBits&=~ALTBIT; oGzZ.K3 A  
     break; X-F|&yE~<  
    case VK_CONTROL: ub |tX 'o  
     MaskBits&=~CTRLBIT; O k-*xd  
     break; cLN(yL  
    case VK_SHIFT: 2 {lo  
     MaskBits&=~SHIFTBIT; u`l1 zMk  
     break; $<)k-Cf  
    default: //judge the key and send message yqpb_h9  
     break; Pg3O )D9  
   } IxY%d}[uo  
   for(int index=0;index<MAX_KEY;index++){ JW!SrM xF  
    if(hCallWnd[index]==NULL) zt1Pu /e  
     continue; R3]Ra&h6N)  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) * \@u,[,  
    { pN+lC[C  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); iJg3`1@j  
     bProcessed=TRUE; `TBI{q[y  
    } UR~9*`Z ,  
   } $ ]/a/!d  
  } ?]S!-6:  
  else if((lParam&0xc000ffff)==1){ //Key down 6x*u S~'  
   switch(wParam) ,|4%YaN.3  
   { gi;#?gps  
    case VK_MENU: Te`Z Qqb  
     MaskBits|=ALTBIT; M[ea!an  
     break; 1uTbN  
    case VK_CONTROL: W&[}-E8<Y  
     MaskBits|=CTRLBIT; gt5  
     break; JFx=X=C  
    case VK_SHIFT: lZTD>$  
     MaskBits|=SHIFTBIT; P=K+!3ZXo  
     break; djVE x }  
    default: //judge the key and send message ,Yg<Z1  
     break; ~Tv %6iaeE  
   } fDmGgD?  
   for(int index=0;index<MAX_KEY;index++) >r7{e:~q  
   { &Y2mLPB  
    if(hCallWnd[index]==NULL) _DChNX   
     continue; 4C&L%A  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) C[$uf  
    { 1MdVWFKXV  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); 6g@@V=mf  
     bProcessed=TRUE; G`NH ~C  
    } ;|v6^2H"  
   } "1rZwFI0l  
  } Qc2_B\K^  
  if(!bProcessed){ `, ?T;JRc  
   for(int index=0;index<MAX_KEY;index++){ 6Cut[*lj^  
    if(hCallWnd[index]==NULL) U$KdY _Z97  
     continue; |5SYKA7CS  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) O?omL5  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); apk06"/  
   } _s./^B_w!  
  } K /h9x9^  
 } iulM8"P  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); 7 \aLK#  
} Sk@~}  
,D-VC{lj  
BOOL InitHotkey() V)\|I8"  
{ Dqu1!f  
 if(hHook!=NULL){  .Ev  i  
  nHookCount++; o >{+vwK  
  return TRUE; v/f&rK*>  
 } GYot5iLg  
 else &#Sg1$/+  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); M?5[#0"&V  
  if(hHook!=NULL) `zAo IQ  
   nHookCount++; CqDMq!  
  return (hHook!=NULL); ulsr)Ik  
} eHG**@"X  
BOOL UnInit() W&y%fd\&3  
{ LR D71*/  
 if(nHookCount>1){ dI&2dcumS  
  nHookCount--; Vin d\yvM  
  return TRUE; ]J)WcM:  
 } e-f_ #!bW  
 BOOL unhooked = UnhookWindowsHookEx(hHook); o<locZ  
 if(unhooked==TRUE){ rWF~a ec  
  nHookCount=0; b #|M-DmT  
  hHook=NULL; `bO+3Y'5  
 } /kyuL]6  
 return unhooked; o9~Z! &p  
} ;ej;<7+  
YD$fN"}-  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) ^r73(8{)  
{ J=W"FEXTL7  
 BOOL bAdded=FALSE; gPY2Bnw;l  
 for(int index=0;index<MAX_KEY;index++){ eu ~WFI  
  if(hCallWnd[index]==0){ YVZm^@ZVV  
   hCallWnd[index]=hWnd; UO8#8  
   HotKey[index]=cKey; $I!vQbi  
   HotKeyMask[index]=cMask;  Aki8#  
   bAdded=TRUE; "YHqls}c  
   KeyCount++; HgE^#qD?  
   break; |eWlB\ x8  
  } <oTIzj7f  
 } ^3IO.`|  
 return bAdded; 2@Jw?+}vr  
} '~%1p_0dq  
8vK Z;  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) ]H) x  
{ Q/r9r*>z  
 BOOL bRemoved=FALSE; 8.Wf^j$+{  
 for(int index=0;index<MAX_KEY;index++){ W"YFx*W  
  if(hCallWnd[index]==hWnd){ )P@t,mxW/  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ =yOIP@  
    hCallWnd[index]=NULL; u!?.vx<qy  
    HotKey[index]=0; WMZ&LlB%  
    HotKeyMask[index]=0; G/\t<>O8o  
    bRemoved=TRUE; "zL<:TQ"  
    KeyCount--; V9NE kS  
    break; i,M<}e1  
   } 4StiYfae  
  } 8v\BW^z3  
 } wqJ^tA!  
 return bRemoved; su>GeJiPW  
} ko*Ir@SDv  
d%NO_=I.  
void VerifyWindow() 1om:SHw  
{ +rfw)c'  
 for(int i=0;i<MAX_KEY;i++){ ~~,\BhG?  
  if(hCallWnd!=NULL){ +DaP XZ5.  
   if(!IsWindow(hCallWnd)){ ~[e;{45V  
    hCallWnd=NULL; ZGf R:a)wc  
    HotKey=0; eaCv8zdX  
    HotKeyMask=0; R2yiExw<  
    KeyCount--; *=mtt^yZ  
   } k?3NF:Yy7  
  } _@;t^j+l  
 } @v\Osp t=  
} 2Kovvh y#  
b/HhGA0  
BOOL CHookApp::InitInstance() /]=Ih  
{ =<MSM\Rb  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); [Nbs{f^J=  
 hins=AfxGetInstanceHandle(); ?8X;F"Ba  
 InitHotkey(); .(^KA{  
 return CWinApp::InitInstance(); "MQy>mD6  
} =v]\{ .  
l8 k@.<nCO  
int CHookApp::ExitInstance() o8;>E>;  
{ A-x; ai]  
 VerifyWindow(); s(jixAf  
 UnInit(); s9+Rq*Qd  
 return CWinApp::ExitInstance(); m1H_kJ  
} ]=!wMn**  
"7}bU_":s  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file }vzP\  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) PKFjM~J  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ k=!lPIx  
#if _MSC_VER > 1000 lHQ:LI  
#pragma once nb dm@   
#endif // _MSC_VER > 1000 CC&opC  
'ol8lIa.P  
class CCaptureDlg : public CDialog 'Dw+k;RH  
{ _W]R|kYl$'  
 // Construction '[(]62j  
 public: >L[n4x\  
  BOOL bTray; zGgPW  
  BOOL bRegistered; n Mm4fns  
  BOOL RegisterHotkey(); eA q/[(  
  UCHAR cKey; 9/2VU< K  
  UCHAR cMask; !Q[j;f   
  void DeleteIcon(); %d?.v_Hu0  
  void AddIcon(); 8'XAZSd(  
  UINT nCount; /c2| *"@X  
  void SaveBmp(); SFqY*:svOw  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor .5$"qb ?  
  // Dialog Data -wr#.8rzTT  
  //{{AFX_DATA(CCaptureDlg) NzS(, F  
  enum { IDD = IDD_CAPTURE_DIALOG }; }@6Tcn1  
  CComboBox m_Key; EZs"?A  
  BOOL m_bControl; V'b$P2 ?^  
  BOOL m_bAlt; E;v#'  
  BOOL m_bShift; :Kq]b@ X  
  CString m_Path; RZMR2fP%  
  CString m_Number; vq?Lej  
  //}}AFX_DATA m&S *S_c  
  // ClassWizard generated virtual function overrides )?`G"( y  
  //{{AFX_VIRTUAL(CCaptureDlg) hp|.hN(kS]  
 public: M02 U,!di  
  virtual BOOL PreTranslateMessage(MSG* pMsg); W*2d!/;7>  
 protected:  iYaS  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support &|9K~#LVS  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); _c!$K#Yl{  
  //}}AFX_VIRTUAL ~fnu;'fN  
  // Implementation [D%(Y ~2  
 protected: XrUc`  
  HICON m_hIcon; W 6c]a/  
  // Generated message map functions px${ "K<  
  //{{AFX_MSG(CCaptureDlg) IL>VH`D  
  virtual BOOL OnInitDialog(); X+2uM+  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); <%4M\n  
  afx_msg void OnPaint(); T W#s)iDi  
  afx_msg HCURSOR OnQueryDragIcon(); G!T_X*^q2U  
  virtual void OnCancel(); 5Z@0XI  
  afx_msg void OnAbout(); %_@T'!]  
  afx_msg void OnBrowse(); -DuI 6K  
  afx_msg void OnChange(); v<3KxP'a  
 //}}AFX_MSG kqkTz_r|H  
 DECLARE_MESSAGE_MAP() vSnGPLl  
}; *^oL$_Y  
#endif 8IkmFXj  
I>EEUQR/$H  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file : X}n[K  
#include "stdafx.h" $GR rTC!  
#include "Capture.h" m'zve%G  
#include "CaptureDlg.h" 5 ) q_Aro  
#include <windowsx.h> $ \+x7"pI  
#pragma comment(lib,"hook.lib") s(T0lul  
#ifdef _DEBUG d&* c3F  
#define new DEBUG_NEW 9.%t9RM^  
#undef THIS_FILE eDsB.^|l  
static char THIS_FILE[] = __FILE__; S]&:R)#@  
#endif "Zfm4Nx "  
#define IDM_SHELL WM_USER+1 KKq%'y)u^  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); VOJ/I Dl 4  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); 7`j%5%q  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; j{j5TvsrY  
class CAboutDlg : public CDialog ]Twyj  
{ = GyABK  
 public: %VGW]!QR  
  CAboutDlg(); dS8ydG2  
  // Dialog Data Uc,MZV4  
  //{{AFX_DATA(CAboutDlg) eEBo:Rc9  
  enum { IDD = IDD_ABOUTBOX }; DRpF EWsm  
  //}}AFX_DATA y/E:6w  
  // ClassWizard generated virtual function overrides 5 JlgnxRq  
  //{{AFX_VIRTUAL(CAboutDlg) 182g6/,  
 protected: 4fIjVx  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support Er;qs*f  
  //}}AFX_VIRTUAL a>6D3n W  
  // Implementation I 12Zh7Cc:  
 protected: wH$qj'G4CN  
  //{{AFX_MSG(CAboutDlg) twu,yC!  
  //}}AFX_MSG sv!zY= 6  
  DECLARE_MESSAGE_MAP() }SC&6B?G  
}; 0hhxTOp  
Xt:$H6 y  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) gxhdxSm=2  
{ 5S8>y7knQ  
 //{{AFX_DATA_INIT(CAboutDlg) S6}_N/;6~  
 //}}AFX_DATA_INIT fgs@oaoZ  
} Yj'9|4%+|  
F b?^+V]9  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) X 0iy  
{ cxQAp  
 CDialog::DoDataExchange(pDX); %W8iC%~  
 //{{AFX_DATA_MAP(CAboutDlg) ,p3]`MG  
 //}}AFX_DATA_MAP >DUTmJxv  
} HAL\j 5i  
OX'V  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) ~&<t++ g  
 //{{AFX_MSG_MAP(CAboutDlg) tT!' qL.*  
 // No message handlers =^GPQ_"  
 //}}AFX_MSG_MAP %L^(eTi[  
END_MESSAGE_MAP() <$yA*  
aoZ| @x  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) $m)gfI]9  
: CDialog(CCaptureDlg::IDD, pParent) Yb^e7Eug  
{ %VFoK-a  
 //{{AFX_DATA_INIT(CCaptureDlg) \c<;!vkZ04  
  m_bControl = FALSE; =3c?W&:  
  m_bAlt = FALSE; %'ah,2a%  
  m_bShift = FALSE; kmc_%Wm}  
  m_Path = _T("c:\\"); D h;5hu2"  
  m_Number = _T("0 picture captured."); r :$tvT*  
  nCount=0; 26g]_Igq  
  bRegistered=FALSE; W03mdRW  
  bTray=FALSE; Cyd/HTNh<  
 //}}AFX_DATA_INIT %SOXw 8-  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 ^7wqb'xg  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); !p/SX>NJ  
} e2v`  
#lrwKHZ+  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) }< H>9iJ:  
{ eJTU'aX*   
 CDialog::DoDataExchange(pDX); dkz% Y]  
 //{{AFX_DATA_MAP(CCaptureDlg) ~;3#MAG  
  DDX_Control(pDX, IDC_KEY, m_Key); p~@,zetS  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); ". tW5O>  
  DDX_Check(pDX, IDC_ALT, m_bAlt); ns%gb!FBJX  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); Nna.NU1  
  DDX_Text(pDX, IDC_PATH, m_Path); JyZuj>` 6  
  DDX_Text(pDX, IDC_NUMBER, m_Number); l<w7 \a6  
 //}}AFX_DATA_MAP TL2E|@k1]  
} ?VNtT/  
RbL?(  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) {6H[[7i  
//{{AFX_MSG_MAP(CCaptureDlg) h40;Q<D  
 ON_WM_SYSCOMMAND() salC4z3  
 ON_WM_PAINT() xcr2|  
 ON_WM_QUERYDRAGICON() fr/EkL1Dl  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) Q"dq_8\`U  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) >O?WRC B  
 ON_BN_CLICKED(ID_CHANGE, OnChange) UqI #F  
//}}AFX_MSG_MAP J)YlG*  
END_MESSAGE_MAP() EL`|>/[J  
[*^.$s(  
BOOL CCaptureDlg::OnInitDialog() P)`^rJ6  
{ ?9()ya-TE  
 CDialog::OnInitDialog(); o6MFMA+vi  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); K khuPBd2  
 ASSERT(IDM_ABOUTBOX < 0xF000); G`zNCx.  
 CMenu* pSysMenu = GetSystemMenu(FALSE); 4C=W~6~  
 if (pSysMenu != NULL) Zu.hcDw1  
 { !G-+O#W`  
  CString strAboutMenu; =\< 7+nv  
  strAboutMenu.LoadString(IDS_ABOUTBOX); 9VxM1-8Gs  
  if (!strAboutMenu.IsEmpty()) 'IX1WS&\"  
  { )$:1e)d  
   pSysMenu->AppendMenu(MF_SEPARATOR); pq{`WgA^  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); D`JBK?~  
  } 7<xnE]jdq  
 } Xj\ToO  
 SetIcon(m_hIcon, TRUE); // Set big icon =:&xdphZ+  
 SetIcon(m_hIcon, FALSE); // Set small icon ZRxOXt&;  
 m_Key.SetCurSel(0); uI-T]N:W8x  
 RegisterHotkey(); J,?#O#j  
 CMenu* pMenu=GetSystemMenu(FALSE); v8ap"9b  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); op}!1y$9P  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); #-;c!<2  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); *&I>3;~%^}  
 return TRUE; // return TRUE unless you set the focus to a control TN0KS]^A3  
} cX-M9Cz  
",b:rgpRp  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) w ~*@TG  
{ ^Gk`n  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) }/a%-07R  
 { v1:.t  
  CAboutDlg dlgAbout; }Z"iW/?"  
  dlgAbout.DoModal(); E@SFK=`  
 } jA{5)-g  
 else TwkT|Piw S  
 { eq6O6-  
  CDialog::OnSysCommand(nID, lParam); z;qDl%AF  
 } %y6Q3@  
} kZw"a*6  
H3rA ?F#+*  
void CCaptureDlg::OnPaint() 1q7&WG  
{ x0<;Rm [u=  
 if (IsIconic()) eg;7BZim{  
 { cZh0\Dy U  
  CPaintDC dc(this); // device context for painting aS [[ AL  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); '3l TI  
  // Center icon in client rectangle st RM *.  
  int cxIcon = GetSystemMetrics(SM_CXICON); cLZ D\1Mt  
  int cyIcon = GetSystemMetrics(SM_CYICON); yzS^8,  
  CRect rect; ?Y~t{5NJR  
  GetClientRect(&rect); T3{O+aRt  
  int x = (rect.Width() - cxIcon + 1) / 2; _KH91$iW8m  
  int y = (rect.Height() - cyIcon + 1) / 2; O*:87:I d  
  // Draw the icon cI2Ps3~"Q  
  dc.DrawIcon(x, y, m_hIcon); *J-pAN  
 } & &}_[{fc  
 else ['mpxtG  
 { & BPYlfB1  
  CDialog::OnPaint(); J8:s=#5  
 } $Z G&d  
} |}G"^r  
V"#0\ |]m  
HCURSOR CCaptureDlg::OnQueryDragIcon() vvxxwZa=O  
{ =!\Nh,\eQ  
 return (HCURSOR) m_hIcon; <j'K7We/tP  
} D :@W*,  
oXG_6E!^  
void CCaptureDlg::OnCancel() "|3I|#s  
{ #<0Hvde  
 if(bTray) x/s:/YN'  
  DeleteIcon(); lM\dK)p21O  
  CDialog::OnCancel(); xv]z>4@z,  
} *u$aItx  
I*-\u  
void CCaptureDlg::OnAbout() zb0NqIN:  
{ |nQfgl=V  
 CAboutDlg dlg; I1 ]YT  
 dlg.DoModal(); Al yJ!f"Y  
} \lK?f]qJq  
H9T~7e+  
void CCaptureDlg::OnBrowse() \n_7+[=E  
{ K GgtEh|  
 CString str; d*6f,z2=  
 BROWSEINFO bi; 3/RwCtc  
 char name[MAX_PATH]; ;u2[Ww~k  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); S|=)^$:  
 bi.hwndOwner=GetSafeHwnd(); Y][12{I{  
 bi.pszDisplayName=name; 2c Xae  
 bi.lpszTitle="Select folder"; gclj:7U  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; C@qWour  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); .<t{saToU  
 if(idl==NULL) ?i<l7   
  return; 5X0ex.  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); 7@{%S~TN  
 str.ReleaseBuffer(); Be{@ L  
 m_Path=str; XoyxS:=>|[  
 if(str.GetAt(str.GetLength()-1)!='\\') I[%IW4jJ  
  m_Path+="\\"; j}Tv/O,f  
 UpdateData(FALSE); 'ON/WKJr|W  
} dg|+?M^9`  
'pA%lc)  
void CCaptureDlg::SaveBmp() 6Jgl"Jw8  
{ %/2 ` u  
 CDC dc; a @? $#>  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); t3$cX_  
 CBitmap bm; 'N{1b_v?  
 int Width=GetSystemMetrics(SM_CXSCREEN); pqg2#@F.  
 int Height=GetSystemMetrics(SM_CYSCREEN); xiW}P% bf  
 bm.CreateCompatibleBitmap(&dc,Width,Height); KLe6V+ki*  
 CDC tdc; M Q =x:p{  
 tdc.CreateCompatibleDC(&dc); jO"/5 x26  
 CBitmap*pOld=tdc.SelectObject(&bm); ?Z|y-4 &>  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); bAt!S  
 tdc.SelectObject(pOld); `pbCPa{Y  
 BITMAP btm; H'S~GP4D  
 bm.GetBitmap(&btm); b$2=w^*  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; y1 a%f.F`  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); bN?*p($/  
 BITMAPINFOHEADER bih; *effDNE!  
 bih.biBitCount=btm.bmBitsPixel; ydD:6bBX  
 bih.biClrImportant=0; _ (b4|hJ'  
 bih.biClrUsed=0; q!&:y7O8  
 bih.biCompression=0; <2*+Y|Lk2  
 bih.biHeight=btm.bmHeight;  e$  
 bih.biPlanes=1; .NdsKhg b  
 bih.biSize=sizeof(BITMAPINFOHEADER); %w_MRC  
 bih.biSizeImage=size; z .lb(xQ  
 bih.biWidth=btm.bmWidth; Q-, 4  
 bih.biXPelsPerMeter=0; OY"BaSEOw}  
 bih.biYPelsPerMeter=0; fwtsr>SV  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); g?1bEOA!  
 static int filecount=0; v*excl~  
 CString name; +2E~=xX  
 name.Format("pict%04d.bmp",filecount++); (q"S0{  
 name=m_Path+name; \.P'8As  
 BITMAPFILEHEADER bfh; :qXREF@h  
 bfh.bfReserved1=bfh.bfReserved2=0; _u-tRHh|A  
 bfh.bfType=((WORD)('M'<< 8)|'B'); #5;4O{  
 bfh.bfSize=54+size; z@[n?t!7k  
 bfh.bfOffBits=54; 3 } $9./+  
 CFile bf; El`G<esX  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ Q-_;.xy#4  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); ]I~BgE;C9  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); 6#d+BBKIc  
  bf.WriteHuge(lpData,size); g7%vI8Y)@  
  bf.Close(); bN*zx)f  
  nCount++; ;).QhHeg>  
 } 9MRe?  
 GlobalFreePtr(lpData); #r&yH^-  
 if(nCount==1) ^-# :T  
  m_Number.Format("%d picture captured.",nCount); w4y ???90)  
 else i/N68  
  m_Number.Format("%d pictures captured.",nCount); AxJf\B8  
  UpdateData(FALSE); t I +]x]m+  
} pv|D{39Hs  
S r7EcT-  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) Ky7-6$  
{ wu0J XB%&^  
 if(pMsg -> message == WM_KEYDOWN) wW/wvC-  
 { 9OF(UFgS  
  if(pMsg -> wParam == VK_ESCAPE) Re\V<\$J  
   return TRUE; 6mrfkYK  
  if(pMsg -> wParam == VK_RETURN) %c c<>Hi  
   return TRUE; 0w^awT<$6  
 } h1_KZ[X  
 return CDialog::PreTranslateMessage(pMsg); D2Kh+~l  
} `4]-B@ 7_  
'UCF2 L  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) [VB\ T|$  
{ nG5:H.)  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ ! F&{I  
  SaveBmp(); ?6^KY+ 5`C  
  return FALSE; BI)$aR  
} -,xsUw4  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ 9%uJ:c?  
 CMenu pop; Y1F P |  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); 0j~C6 vp  
 CMenu*pMenu=pop.GetSubMenu(0); oY%NDTVN  
 pMenu->SetDefaultItem(ID_EXITICON); UD r@  
 CPoint pt; ;fDs9=3#  
 GetCursorPos(&pt); zw X 1&rN  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this);  Et0;1  
 if(id==ID_EXITICON) 93N:?B9  
  DeleteIcon(); |a {*r.  
 else if(id==ID_EXIT) |N>TPK&Xt  
  OnCancel(); &mvC<_1n  
 return FALSE; )![? JXf  
} ,NaNih1  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); E>SLR8!C v  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) <[GkhPfZ  
 AddIcon(); ]^^mJt.Iv  
 return res; )Wm:Ilq  
} d1>Nn!m  
co%ttH\ n  
void CCaptureDlg::AddIcon() _gF )aE  
{ DPZG_{3D  
 NOTIFYICONDATA data; Ik4U+'z6  
 data.cbSize=sizeof(NOTIFYICONDATA); !_gHIJiq}  
 CString tip; ebS>_jD  
 tip.LoadString(IDS_ICONTIP); +O @0gl  
 data.hIcon=GetIcon(0); 4HK#]M>yz  
 data.hWnd=GetSafeHwnd(); Xj<B!Wn*Xb  
 strcpy(data.szTip,tip); 4`7:gfrO,  
 data.uCallbackMessage=IDM_SHELL; <OEu 4,~:  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; 7,2bR  
 data.uID=98; xV4 #_1(  
 Shell_NotifyIcon(NIM_ADD,&data); >{^&;$G+*  
 ShowWindow(SW_HIDE); (TV ye4Z  
 bTray=TRUE; i 7 f/r.  
} &pD6Qq{  
jdGoPa\  
void CCaptureDlg::DeleteIcon() \]W*0t>s  
{ viT/$7`AI  
 NOTIFYICONDATA data; /gKX%`ZF/r  
 data.cbSize=sizeof(NOTIFYICONDATA); M38QA  
 data.hWnd=GetSafeHwnd(); iC`K$LY4W  
 data.uID=98; I7hE(2!$  
 Shell_NotifyIcon(NIM_DELETE,&data); _kb $S  
 ShowWindow(SW_SHOW); 7N / v  
 SetForegroundWindow(); h$FpH\-  
 ShowWindow(SW_SHOWNORMAL); ^[SQw)*  
 bTray=FALSE; dhW)<  
} LuB-9[^<  
wTGH5}QZ+  
void CCaptureDlg::OnChange() @O/-~, E68  
{  DKu4e  
 RegisterHotkey(); jd|? aK;(  
} AAE8j.  
#]'#\d#i  
BOOL CCaptureDlg::RegisterHotkey() lz1l1.f8  
{ p*8LS7UT  
 UpdateData(); F{a--  
 UCHAR mask=0;  h+Dp<b  
 UCHAR key=0; C{<qc,!4  
 if(m_bControl) +^ n\?!  
  mask|=4; ~*9 vn Z@  
 if(m_bAlt) C#`VVtei  
  mask|=2; q"@Y2lhD!  
 if(m_bShift) :[oFe/1K!4  
  mask|=1; %l!Gt"\xm  
  key=Key_Table[m_Key.GetCurSel()]; 7yLO<o?9w  
 if(bRegistered){ xJ)hGPrAl  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); pmR6(/B#  
  bRegistered=FALSE; y,i:BQJ<  
 } g<VJ4TE6R  
 cMask=mask; Q<.84 7 )  
 cKey=key; mdW8RsR  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); j'#M'W3@  
 return bRegistered; <J4|FOz!=  
} RfVVAaI  
pZx'%-\-T  
  四、小结 =^m,|j|d>4  
sBGYgBu!a  
  本实例通过一个钩子DLL实现了屏幕抓图的功能,它有一个缺陷,那就是只能保存整个屏幕图像,不过读者朋友可以在此基础上,实现屏幕任意区域的抓图功能,具体方法不再赘述,实现起来很容易的了,呵呵。
评价一下你浏览此帖子的感受

精彩

感动

搞笑

开心

愤怒

无聊

灌水
描述
快速回复

您目前还是游客,请 登录注册
欢迎提供真实交流,考虑发帖者的感受
认证码:
验证问题:
3+5=?,请输入中文答案:八 正确答案:八