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
  • 4767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: $*a'84-5G-  
  /Ss7"*JLe  
  一、实现方法 C`jM0Q  
;^Sr"v6r>u  
  热键管理DLL实际上是一个键盘钩子,由它来监视系统的键盘事件。如果有和程序登记符合的按键组合就通知该程序的窗口。为了应用方便,本实例把它做成了一个标准的管理库来为其它的程序通过热键服务,它有两个输出函数:AddHotkey()和DeleteHotkey(),程序只需要调用这两个函数就可以了,如果编译之后不用改变热键,则只需要AddHotkey就可以了。DLL中的所有的全局变量都放在一个共享段中,定义如下: (m[bWdANnW  
M@1r:4CoKH  
#pragma data_seg("shareddata") vR6Bn  
HHOOK hHook =NULL; //钩子句柄 k^ F@X  
UINT nHookCount =0; //挂接的程序数目 2f`nMW  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 YT/kC'A  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 PYRd] %X  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey ^I6^g  
static int KeyCount =0; zjL.Bhiud  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 V==z"  
#pragma data_seg() SHb(O<6  
I:V0Xxz5t  
  关于共享段,有几点重要的说明:一是必须在链接选项里指定该段为共享:一种方法是在project->settings->link->object/library中加上/section:shareddata,rws;第二种方法是在def文件的sections里加上一句shareddata read write shared;第三种指定共享段的方法在程序里加上一句#pragma comment(linker,"section:shareddata,rws")。二是所有的变量必须初始化,否则链接程序会把它放到普通数据段。三是如果不初始化变量,需要在段外用"__declspec(allocate("shareddata")) 变量类型 变量名"的方式定义。 ;{[>&4  
{4aWR><  
  DLL中的两个输出函数分别用来添加/删除热键,函数代码如下:  }}<Z,/O  
BElJB&I  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR DD9?V}Yx  
cKey,UCHAR cMask) +y2[msBs  
{ gnp~OVDqfL  
 BOOL bAdded=FALSE; ^[-el=oKn0  
 for(int index=0;index<MAX_KEY;index++){ ;8S/6FI  
  if(hCallWnd[index]==0){ NCqo@vE  
   hCallWnd[index]=hWnd; t2" (2  
   HotKey[index]=cKey; !  Z`0(d  
   HotKeyMask[index]=cMask; l=N2lHU  
   bAdded=TRUE; raVA?|'g~  
   KeyCount++; D0(xNhmKz  
   break; ;;$#)b  
  } C${ S^v  
 } ajRSMcKb7i  
 return bAdded; p R dk>Ph  
} 7?gFy-  
//删除热键 2jsw"aHW  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) 9z;HsUv  
{ )?M9|u  
 BOOL bRemoved=FALSE; |sZ!  
 for(int index=0;index<MAX_KEY;index++){ l+][V'zL  
  if(hCallWnd[index]==hWnd){ m@`8A  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ , B&fFis  
    hCallWnd[index]=NULL; I\?9+3 XnQ  
    HotKey[index]=0; . #Z+Z  
    HotKeyMask[index]=0; kc'pN&]r:  
    bRemoved=TRUE; Ll4bdz,  
    KeyCount--; C'=k&#<-  
    break; {y]mk?j  
   } '$As<LOEd/  
  } Q(d9n8  
 } rKHY?{!  
 return bRemoved; q{2I_[p  
} }ZSQ>8a  
ffXyc2o  
}u+a<:pkK  
  DLL中的钩子函数如下: 6<,dRn  
m]_FQWfet  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) 1QZ&Mj^^  
{ _ ~RpGX  
 BOOL bProcessed=FALSE; CSbI85F  
 if(HC_ACTION==nCode) .I VlEG0  
 { 3bqC\i^[\m  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 m+{K^kr[  
   switch(wParam) WD;Y~|  
   {  z|7zj/+g  
    case VK_MENU: ~m1P_`T  
     MaskBits&=~ALTBIT; b96%")  
     break; B()/.w?A  
    case VK_CONTROL: fW`&'!  
     MaskBits&=~CTRLBIT; 1Kvx1p   
     break; i`/+,<  
    case VK_SHIFT: b5m=7;u*h  
     MaskBits&=~SHIFTBIT; MC 0TaP  
     break; #zrTY9m7  
    default: //judge the key and send message e}@)z3Q<l  
     break; `6y{.$ z  
   } .*$OQA  
   for(int index=0;index<MAX_KEY;index++){ ;n=. {[,  
    if(hCallWnd[index]==NULL) ~'5  
     continue; Uw-p758dD  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) hqk}akXt  
    { LAx4Xp/  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); 1iL 'V-y  
     bProcessed=TRUE; 0w'j+  
    } Et"?8\"n7  
   } T&T/C@z'R  
  } 58%'UwKn  
  else if((lParam&0xc000ffff)==1){ //有键按下 ?6c-7QV  
   switch(wParam) j7FN\ cz  
   { G5dO 3lwq  
    case VK_MENU: q(5j(G ;  
     MaskBits|=ALTBIT; O=)  
     break; H$ftGwS8  
    case VK_CONTROL: ~ `>e5OgOJ  
     MaskBits|=CTRLBIT; /2{5;  
     break; .yT8NTu~0j  
    case VK_SHIFT: mD:IO  
     MaskBits|=SHIFTBIT; FtufuL?JS  
     break; a"/#+=[  
    default: //judge the key and send message [md u!!*  
     break; ]maYUKqv}'  
   } 5#3W5z  
   for(int index=0;index<MAX_KEY;index++){  I~,G  
    if(hCallWnd[index]==NULL) Vh3Ijn  
     continue; w(L>#?  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) *xf._~E  
    { 6b8;}],|  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); EzW)'Zzw~  
     bProcessed=TRUE; TGuiNobD  
    } V~GWl1#7  
   } 1%M&CX  
  } b1pQ`qt  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 CV$],BM  
   for(int index=0;index<MAX_KEY;index++){ at!Y3VywG  
    if(hCallWnd[index]==NULL) l ?Y_~Wuw  
     continue; ^^i6|l1  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) *?QE2&S:  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); 3QI?[R.  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 %xwIt~Y  
   } )Fd HV;K  
  } WWwUwUi  
 } a/~aFmu6b  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); rzrl>9 h  
} E'1+Yq  
{)- .xG  
  抓图程序是一个基于对话框的程序,它在建立对话框的时候调用前面的DLL,登记热键,因此需要将hook.lib添加到工程里,在程序里给出两个DLL函数的定义,也可以写个头文件,再包含进来以下代码: [w -{r+[  
oMcK`%ydm  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); gADmN8G=  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); .*=]gZ$IE  
NT%W;)6m9  
  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: :J}t&t  
M-NV_W&M  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) <1w/hy&mWN  
{ C0.'_  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) eZ a:o1y  
 { qLncn}oNM  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 %zC[KE*~  
  SaveBmp(); S gMrce<;  
  return FALSE; HQ9f ,<  
 } @RD+xYm  
 …… //其它处理及默认处理 #5sD{:f`  
} bLz*A-  
kH*Pn'  
3`hUo5K  
  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。 >idBS  
ezhDcI_T  
  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。 [MX;,%;;  
^/wfXm  
  二、编程步骤 [#" =yzR<3  
*y`%]Hy<  
  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"; j^`X~gE  
F} J-gZl  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; /9Q3iV$I]  
nM=e]qH  
  3、 在"Capture"项目中按照图一所示设置对话框的界面,具体设置参见代码部分; Y**|N8e  
QH4wUU3X  
  4、 使用Class Wizard在"Capture"项目中添加按钮的鼠标单击消息响应函数,并重载对话框的WindowProc()函数; a\kb^D=T  
HQ!Xj .y  
  5、 添加代码,编译运行程序。 puSLqouTM  
fQWIw  
三、程序代码 B;Nl~Y|\  
^Yr0@pE  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL TAL/a*7\  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) vv6$>SU  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_  [\)oo  
#if _MSC_VER > 1000 y<W8Q<9  
#pragma once kI*(V [i  
#endif // _MSC_VER > 1000 *VSel4;\t  
#ifndef __AFXWIN_H__ 3zuF{Q2P<  
#error include 'stdafx.h' before including this file for PCH @e~]t}fH  
#endif OwzJO  
#include "resource.h" // main symbols lJykyyCY+  
class CHookApp : public CWinApp ,O=a*%0rt  
{ \8uo{#cL8  
 public: KHKS$D  
  CHookApp(); q^8EOAvnZ  
  // Overrides k1z$e*u&r  
  // ClassWizard generated virtual function overrides XA0 (f*  
  //{{AFX_VIRTUAL(CHookApp) 0X..e$ '  
 public: oC*ees g_  
  virtual BOOL InitInstance(); L^kp8o^$  
  virtual int ExitInstance(); +5<k-0v  
  //}}AFX_VIRTUAL NW$H"}+o  
  //{{AFX_MSG(CHookApp) WV;=@v  
  // NOTE - the ClassWizard will add and remove member functions here. P#kGX(G9!  
  // DO NOT EDIT what you see in these blocks of generated code ! D|I Ec?  
  //}}AFX_MSG vY6W|<s  
  DECLARE_MESSAGE_MAP() wbbqt0un  
};  hRaf#  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); l2v_?j-)x  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); {TSY|D2  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); pvWau1ArNq  
BOOL InitHotkey(); Hyk'c't_O  
BOOL UnInit(); 5G}6;UY  
#endif !.-tW7   
]>##`X  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. &'|B =7  
#include "stdafx.h" h4&;?T S  
#include "hook.h" : 2V^K&2L  
#include <windowsx.h> h SqY$P  
#ifdef _DEBUG {B$2"q/~  
#define new DEBUG_NEW :@ uIxa$[  
#undef THIS_FILE L/}iy}  
static char THIS_FILE[] = __FILE__; XY7Qa!>7j  
#endif W@L3+4  
#define MAX_KEY 100 6@;ha=[+  
#define CTRLBIT 0x04 TDK@)mP  
#define ALTBIT 0x02 1ZJ4*bn  
#define SHIFTBIT 0x01 (Ha@s^?.C  
#pragma data_seg("shareddata") zbw7U'jk  
HHOOK hHook =NULL; ! U0z"  
UINT nHookCount =0; qX:B4,|ck  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey 0V,Nv9!S  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT )yee2(S  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey `qpc*enf0  
static int KeyCount =0; MKGS`X]<J  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift ={(j`VSUX0  
#pragma data_seg() -Q e~)7  
HINSTANCE hins; $FM' 3%B[  
void VerifyWindow(); ; ~ 4k7Uz  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) jjOgG-Q  
//{{AFX_MSG_MAP(CHookApp) jdRq6U^  
// NOTE - the ClassWizard will add and remove mapping macros here.  aA*9,  
// DO NOT EDIT what you see in these blocks of generated code! dFW=9ru+MQ  
//}}AFX_MSG_MAP >}+Q:iNQ)2  
END_MESSAGE_MAP() a^nAZ  
hAR? t5c  
CHookApp::CHookApp() 8 ,}ikOZ?  
{ 0O@_ cW  
 // TODO: add construction code here, y+mElG$F  
 // Place all significant initialization in InitInstance kka"C]!  
} 7 &)]) {Q  
>O{7/)gS^  
CHookApp theApp; M.%shrJ/  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) ^t. W|teD  
{ F%.xuLW  
 BOOL bProcessed=FALSE; {g F0Xm%  
 if(HC_ACTION==nCode)  <dR,'  
 { ND]S(C"?  
  if((lParam&0xc0000000)==0xc0000000){// Key up "Tbnxx]J  
   switch(wParam) =WZ%H_oxi  
   { 6k0^x Q  
    case VK_MENU: a_T,t'6  
     MaskBits&=~ALTBIT; vS; '}N  
     break; Y)HbxFF`/  
    case VK_CONTROL: B+VuUt{S  
     MaskBits&=~CTRLBIT; tiQ;#p7%  
     break; <HoAj"xf  
    case VK_SHIFT: q|#MB7e/  
     MaskBits&=~SHIFTBIT; ?qHF}k|  
     break; eMMx8E)B  
    default: //judge the key and send message LVtu*k   
     break; 9Ld9N;rWm#  
   } cf8-]G?tK  
   for(int index=0;index<MAX_KEY;index++){ h* .w"JO  
    if(hCallWnd[index]==NULL) GG-[`!>.pw  
     continue; O&?.&h  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) W|c.l{A5Q  
    { gp  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); #!#z5DJu  
     bProcessed=TRUE; "e62/Ejg%  
    } 9BON.` |_  
   } 1$LIpx  
  } <! x+e E`  
  else if((lParam&0xc000ffff)==1){ //Key down hb^!LtF#Y  
   switch(wParam) xxX/y2\  
   { [B/0-(?  
    case VK_MENU: # mT]j""  
     MaskBits|=ALTBIT; jz:gr=* z  
     break; a8uYs DS  
    case VK_CONTROL: o"_=K%9  
     MaskBits|=CTRLBIT; qc8Ta"  
     break; 7[o {9Yp&  
    case VK_SHIFT: SE`l(-tL  
     MaskBits|=SHIFTBIT; (O5)wej   
     break; E20&hc5 8  
    default: //judge the key and send message ia{kab|_5  
     break; 9;f|EGwZ  
   } :EHQ .^  
   for(int index=0;index<MAX_KEY;index++) ZlR!s!vv  
   { Aka^e\Y@6*  
    if(hCallWnd[index]==NULL) 'Ji+c  
     continue; 2w1tK  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) 4,}GyVJFb`  
    { jMU9{Si  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); I-:` cON=G  
     bProcessed=TRUE; Vewzo1G2  
    } EF;,Gjh5p  
   } pMN<p[MB  
  } UC!5 wVY  
  if(!bProcessed){ S<oQ}+4[~  
   for(int index=0;index<MAX_KEY;index++){ iHz[Zw^.s  
    if(hCallWnd[index]==NULL) @>O&Cpt  
     continue; v]bAWo  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) rx:lKoOnB  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); ]h@{6N'oNS  
   }  KOS yh<&  
  } ,P@QxnQ   
 } R;THA!  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); YNM\pX'  
} 8~5|KO >F  
oh&Y< d0  
BOOL InitHotkey() ?)cJZ>$!w  
{ ,L%p  
 if(hHook!=NULL){ R<g=\XO'y  
  nHookCount++; QkX@QQ T?  
  return TRUE; Kym:J \}9B  
 } u2lmwE  
 else 37>MJ  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); 3 jh|y,  
  if(hHook!=NULL) ay[+2"  
   nHookCount++; k,]{NO   
  return (hHook!=NULL); s/ S+ ec3  
} Ekf2NT  
BOOL UnInit() ;D&wh  
{ cEi<}9r  
 if(nHookCount>1){ ? ).(fP  
  nHookCount--; dofR)"<p,^  
  return TRUE; Mf7E72{D  
 } >sV Bj(f  
 BOOL unhooked = UnhookWindowsHookEx(hHook); VRhRwdC  
 if(unhooked==TRUE){ 8|<f8Z65!  
  nHookCount=0; P%!q1`Eke(  
  hHook=NULL; )dg UmN  
 } 0*{p Oe/u  
 return unhooked; lt%-m@#/  
} we a\8[U3"  
'%O\E{h  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) J~2 CD*v  
{ r %xB8e9  
 BOOL bAdded=FALSE; j?J=w=.Nx  
 for(int index=0;index<MAX_KEY;index++){ ~%GSsm\J  
  if(hCallWnd[index]==0){ *]9XDc]{j1  
   hCallWnd[index]=hWnd; 4`0;^K.  
   HotKey[index]=cKey; +-k`x0v  
   HotKeyMask[index]=cMask; :eLLDp<  
   bAdded=TRUE; 2o}8W7y  
   KeyCount++; }q x(z^  
   break; D4\(:kF\Hg  
  } p,^>*/O>  
 } dh,7iQ s  
 return bAdded; ~$ WQ"~z  
} | VRq$^g  
1 ' %-y  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) _ ^3@PM>  
{ A?V<l<EAm  
 BOOL bRemoved=FALSE; |vN$"mp^a  
 for(int index=0;index<MAX_KEY;index++){ "j;!_v>=f`  
  if(hCallWnd[index]==hWnd){ 73#9NZ R  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ A>y#}^l]  
    hCallWnd[index]=NULL; / GZV_H%v  
    HotKey[index]=0; :O#gJob-%s  
    HotKeyMask[index]=0; OAyE/Q|  
    bRemoved=TRUE; ?(M\:`G'  
    KeyCount--; n]Ebwznt-  
    break; 6P6Jx;  
   } k dUc&  
  } QD6Z=>?S  
 } PE +qYCpP9  
 return bRemoved; )%1&/uN)  
} M{y|7e%K  
zkvH=wL  
void VerifyWindow() m R"9&wq  
{  2fbvU  
 for(int i=0;i<MAX_KEY;i++){ LDSbd,GF  
  if(hCallWnd!=NULL){ yl|R:/2V  
   if(!IsWindow(hCallWnd)){ $M%}Oz3*  
    hCallWnd=NULL; r]Z.`}Kkm  
    HotKey=0; 34^Q5B~^J  
    HotKeyMask=0; lK 9s0t'  
    KeyCount--; U@MOvW)  
   } fG^7@J w:G  
  } I[vME"  
 } 7jD@Gp`" 3  
} F\l!A'Q+t  
ZlUFJ*pk  
BOOL CHookApp::InitInstance() I\)N\mov e  
{ ook' u }h  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); 8Na}Wp;|Gi  
 hins=AfxGetInstanceHandle(); <:H  
 InitHotkey(); X@G[=Rs  
 return CWinApp::InitInstance(); ZO]E@?Oav  
} )E_!rR  
_p?I{1O  
int CHookApp::ExitInstance() 3<yCe%I:  
{ ggzAU6J  
 VerifyWindow(); P'KY.TjWb  
 UnInit(); vsxvHot=  
 return CWinApp::ExitInstance(); _y.mpX&  
} Ni/|C19Z  
jAsh   
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file vQE` c@^{  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) GWVEIZ  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ (p}9^Y  
#if _MSC_VER > 1000 :a#|  
#pragma once #zh6=.,7  
#endif // _MSC_VER > 1000 |2tSUOZ  
kvY} yw7  
class CCaptureDlg : public CDialog :ga 9Db9P  
{ ;g!xQvcR  
 // Construction 8Fyc#Xo8  
 public: |v,}%UN2  
  BOOL bTray; $v2S;UB v*  
  BOOL bRegistered; 99=[>Ck)G  
  BOOL RegisterHotkey(); \Or]5ogT'  
  UCHAR cKey; 6uv'r;U]  
  UCHAR cMask; X:iG[iU*  
  void DeleteIcon(); %l0_PhAB  
  void AddIcon(); Z%(Df3~gmm  
  UINT nCount; OD>u$tI9  
  void SaveBmp(); BIwgl@t!>  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor lU >)n  
  // Dialog Data ci#Zvhtk r  
  //{{AFX_DATA(CCaptureDlg) 0EF,uRb  
  enum { IDD = IDD_CAPTURE_DIALOG }; S8rW'}XJ=H  
  CComboBox m_Key; 89?3,k  
  BOOL m_bControl; S+4I[|T]Y  
  BOOL m_bAlt; Ta!m%=8  
  BOOL m_bShift; }j]<&I}  
  CString m_Path; $NH`Iu9t  
  CString m_Number; 0YgFjd 5  
  //}}AFX_DATA 50O7=  
  // ClassWizard generated virtual function overrides ([z<TS#Md  
  //{{AFX_VIRTUAL(CCaptureDlg) H"kc^G+(R"  
 public: O#<|[Dzw  
  virtual BOOL PreTranslateMessage(MSG* pMsg); _oYA;O  
 protected: +Px<DX+  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support LL6ON }  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); )4VL m  
  //}}AFX_VIRTUAL [U_Q 2<H  
  // Implementation ?}!gLp  
 protected: e\+~  
  HICON m_hIcon; wt3Z?Pb  
  // Generated message map functions T/X?ZK(T  
  //{{AFX_MSG(CCaptureDlg) I3F6-gH  
  virtual BOOL OnInitDialog(); 6jQ&dN{=qB  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); ; +#za?w  
  afx_msg void OnPaint(); M,=@|U/B  
  afx_msg HCURSOR OnQueryDragIcon(); 4OB~h]Vc  
  virtual void OnCancel(); y"%iD`{  
  afx_msg void OnAbout(); QmDhZ04f  
  afx_msg void OnBrowse(); QZz{74]n  
  afx_msg void OnChange(); TWD|1 di0  
 //}}AFX_MSG /;]B1T7  
 DECLARE_MESSAGE_MAP() JCQx8;V%I  
}; >"m@qkh  
#endif bHlDm~5  
-X6\[I:+A  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file V8|q"UX  
#include "stdafx.h" 3z{5c   
#include "Capture.h" &,6y(-  
#include "CaptureDlg.h" t8a@L(J$  
#include <windowsx.h> %^)JaEUC  
#pragma comment(lib,"hook.lib") nOL 25Y:  
#ifdef _DEBUG ._F 6-pl  
#define new DEBUG_NEW ft. }$8vIT  
#undef THIS_FILE ~L Bq5a  
static char THIS_FILE[] = __FILE__; )e <! =S  
#endif r5fz6"  
#define IDM_SHELL WM_USER+1 eO[Cb]Dy:  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); bo?3E +B  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); ]CtoK%k  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; e-duZ o  
class CAboutDlg : public CDialog DftGy:Ah3  
{ Q'%5"&XFD  
 public: J7 zVi  
  CAboutDlg(); nP3;<*T P0  
  // Dialog Data /d]V{I~6  
  //{{AFX_DATA(CAboutDlg) bl!f5ROS(  
  enum { IDD = IDD_ABOUTBOX }; GhfUCW%  
  //}}AFX_DATA N4JqW  
  // ClassWizard generated virtual function overrides Q,`2DHhK  
  //{{AFX_VIRTUAL(CAboutDlg) v1tN DyM6  
 protected: 0;m$a=  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support y9l.i@-  
  //}}AFX_VIRTUAL ky lrf4=  
  // Implementation qyG636i  
 protected: e8ig[:B>+  
  //{{AFX_MSG(CAboutDlg) u^4"96aXJ  
  //}}AFX_MSG 8BoT%kVeJv  
  DECLARE_MESSAGE_MAP() 6XxG1]84  
}; &j~|3  
.]sIoB-54  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) :\w[xqH  
{ 7AFS)_w  
 //{{AFX_DATA_INIT(CAboutDlg) R*TGn_J`  
 //}}AFX_DATA_INIT 35]G_\  
} >cr_^(UW&  
zL!~,B8C  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) (gJ )]/n  
{ .8uwg@yD  
 CDialog::DoDataExchange(pDX); Dy!bj  
 //{{AFX_DATA_MAP(CAboutDlg) 5}l#zj  
 //}}AFX_DATA_MAP 7)6Yfa]I%  
} lVp~oZC6[  
h9OL%n 7m'  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) 0)]C&;}_M  
 //{{AFX_MSG_MAP(CAboutDlg) E( 4lu%  
 // No message handlers ^*UfCoj9Z  
 //}}AFX_MSG_MAP  W$VCST  
END_MESSAGE_MAP() ]OCJ~Zw  
-L4G WJ~.-  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) %F]9^C+  
: CDialog(CCaptureDlg::IDD, pParent) }+RF~~H/  
{ oJ;O>J@c  
 //{{AFX_DATA_INIT(CCaptureDlg) {uQ)p=  
  m_bControl = FALSE; w)y9!li  
  m_bAlt = FALSE;  _I}L$  
  m_bShift = FALSE; gBiQIhz  
  m_Path = _T("c:\\"); >^\>-U|  
  m_Number = _T("0 picture captured."); [#*?uu+ jK  
  nCount=0; V1fvQ=9  
  bRegistered=FALSE; +}L3T"  
  bTray=FALSE; ~1]2A[`s!  
 //}}AFX_DATA_INIT LU IT=+  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 5\kZgXWIh  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); Y" +1,?yH  
} AqKx3p6  
2Q'XB  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) 08n%% F  
{ a):Run  
 CDialog::DoDataExchange(pDX); jvQ+u L  
 //{{AFX_DATA_MAP(CCaptureDlg) MfpWow-#{  
  DDX_Control(pDX, IDC_KEY, m_Key); C.e|VzQa  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); %LZM5Z^  
  DDX_Check(pDX, IDC_ALT, m_bAlt); Xgth|C}k  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); iYQy#kO  
  DDX_Text(pDX, IDC_PATH, m_Path); YU0HySP:  
  DDX_Text(pDX, IDC_NUMBER, m_Number); '<W,-i  
 //}}AFX_DATA_MAP HF=C8ZtlL  
} 1*, ~1!>  
jl0Eg  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) WUK.>eM0  
//{{AFX_MSG_MAP(CCaptureDlg) &*:)5F5  
 ON_WM_SYSCOMMAND() D.Cs nfJ  
 ON_WM_PAINT() y<x_v )k-  
 ON_WM_QUERYDRAGICON() $cpQ7  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) <7-,`   
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) = Vr[V@  
 ON_BN_CLICKED(ID_CHANGE, OnChange) TKBK3N  
//}}AFX_MSG_MAP 2yO)}g FJ  
END_MESSAGE_MAP() HNUR6H&Fta  
\ui~n:aWJ  
BOOL CCaptureDlg::OnInitDialog() :a!a  
{ @DC2ci >  
 CDialog::OnInitDialog(); h|uP=0   
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); T(Gf~0HYF  
 ASSERT(IDM_ABOUTBOX < 0xF000); .O-DVW Cm  
 CMenu* pSysMenu = GetSystemMenu(FALSE); 9X&qdA/q  
 if (pSysMenu != NULL) e`2R{H  
 { -V_S4|>   
  CString strAboutMenu; SR8Kzk{  
  strAboutMenu.LoadString(IDS_ABOUTBOX); #2'&=?J1r  
  if (!strAboutMenu.IsEmpty()) N4(VRA  
  { )n[Mh!mn  
   pSysMenu->AppendMenu(MF_SEPARATOR); <m gTWv  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); WuZ n|j'  
  } [)6E) E`_e  
 } @' :um  
 SetIcon(m_hIcon, TRUE); // Set big icon ^^Q32XC,  
 SetIcon(m_hIcon, FALSE); // Set small icon e6xjlaKb  
 m_Key.SetCurSel(0); `ip69 IF2*  
 RegisterHotkey(); %f(.OR)6{  
 CMenu* pMenu=GetSystemMenu(FALSE); |oi49:NXn  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); _p2<7x i   
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); 9 @*>$6  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); 0bL=l0N$W  
 return TRUE; // return TRUE unless you set the focus to a control UT7lj wT  
} sW3D ( n  
oc%le2   
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) Kf<_A{s  
{ >@e%,z  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) ;9 n8on\  
 { (gC^5&11  
  CAboutDlg dlgAbout; V+ ~2q=  
  dlgAbout.DoModal(); MCpK^7]k  
 } @gGuV$Mw  
 else {QkH%jj  
 { "8TMAF|i4  
  CDialog::OnSysCommand(nID, lParam); a2_IF,p*?  
 } \~j(ui|  
} ]H'82a  
*G|]5  
void CCaptureDlg::OnPaint() l8lR5<  
{ \gv x)S11  
 if (IsIconic()) ?o'arxCxZn  
 { qc"/T16M]  
  CPaintDC dc(this); // device context for painting gCI'YEx  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); &: 8&;vk  
  // Center icon in client rectangle "$;:dfrU  
  int cxIcon = GetSystemMetrics(SM_CXICON); PH &ms  
  int cyIcon = GetSystemMetrics(SM_CYICON); $^ dk>Hj>4  
  CRect rect; JT^0AZ_*  
  GetClientRect(&rect); rX}==`#\  
  int x = (rect.Width() - cxIcon + 1) / 2; J0bs$  
  int y = (rect.Height() - cyIcon + 1) / 2; (uz!:dkvx  
  // Draw the icon CPM6T$_qE  
  dc.DrawIcon(x, y, m_hIcon); 3? CpylCO  
 } R}<s~` Pl  
 else zb)SlR  
 { ]J]p:Y>NL  
  CDialog::OnPaint(); j=QjvWD  
 } 'E8Qi'g  
} w.- i !Ls  
/UyE- "S  
HCURSOR CCaptureDlg::OnQueryDragIcon() SP1oBR"3  
{ %d\+(:uu/  
 return (HCURSOR) m_hIcon; A8Y~^wn  
} T`[ZNq+${  
)`7h,w J[1  
void CCaptureDlg::OnCancel() ~ZN9 E-uL  
{ gq &85([  
 if(bTray) DTVnQC  
  DeleteIcon(); qiJ{X{lI  
  CDialog::OnCancel(); DdBr Jx  
} YZ P  
q2i~<;Z)9  
void CCaptureDlg::OnAbout() HjR<4;2  
{ bvTkS EN  
 CAboutDlg dlg; M)Q+_c2*  
 dlg.DoModal();  Vp4]  
} !Ve3:OZ.nO  
%z(=GcWm  
void CCaptureDlg::OnBrowse() >(a_9l;q  
{ Xq^{P2\w1  
 CString str; " N4]e/.V  
 BROWSEINFO bi; niBpbsO  
 char name[MAX_PATH]; L]")TQ  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); 4`]1W,t  
 bi.hwndOwner=GetSafeHwnd(); `"4EE}eQc  
 bi.pszDisplayName=name; AOUO',v  
 bi.lpszTitle="Select folder"; "ET"dMxU  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; #JM*QVzv  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); .JjuY'-Q  
 if(idl==NULL) biK.HL\V  
  return; &|*|  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH));  t/(j8w  
 str.ReleaseBuffer(); FM];+d0  
 m_Path=str; b=EZtk6>  
 if(str.GetAt(str.GetLength()-1)!='\\') 9Ua@-  
  m_Path+="\\"; /% 1lJD  
 UpdateData(FALSE); mJT m/C  
} OSU=O  
Q)&Ztw<  
void CCaptureDlg::SaveBmp() mj~CCokF{?  
{ Y [S^&pF  
 CDC dc; FFGTIT# {"  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); (^\i(cfu6Q  
 CBitmap bm; '5\1uB PKW  
 int Width=GetSystemMetrics(SM_CXSCREEN); +[+ Jd)Z  
 int Height=GetSystemMetrics(SM_CYSCREEN); _Z&R'`kg  
 bm.CreateCompatibleBitmap(&dc,Width,Height); ;_*F [ }w  
 CDC tdc; K)OlCpHc  
 tdc.CreateCompatibleDC(&dc); `BY`ltW  
 CBitmap*pOld=tdc.SelectObject(&bm); eD0@n :  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); k/O&,T77}J  
 tdc.SelectObject(pOld); !^\/ 1^  
 BITMAP btm; b L~<~gA  
 bm.GetBitmap(&btm); eyV904<F  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; .jw)e!<\N  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); =Y0m;-1M  
 BITMAPINFOHEADER bih;  VVY\W!  
 bih.biBitCount=btm.bmBitsPixel; +a;j>hh  
 bih.biClrImportant=0; i|Wn*~yFOO  
 bih.biClrUsed=0; RJM(+5xQ|  
 bih.biCompression=0; qZG >FC37  
 bih.biHeight=btm.bmHeight; 5Tq 3L[T5;  
 bih.biPlanes=1; &h-1Z}  
 bih.biSize=sizeof(BITMAPINFOHEADER); m\=u/Zip  
 bih.biSizeImage=size; gE~31:a^  
 bih.biWidth=btm.bmWidth; !5-[kG&  
 bih.biXPelsPerMeter=0; V>Cf 8>m  
 bih.biYPelsPerMeter=0; LX'US-B.!  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); $'Z!Y;Ue  
 static int filecount=0; 0M p>X  
 CString name; Yg b#U'|  
 name.Format("pict%04d.bmp",filecount++); Z(P#]jI]  
 name=m_Path+name; nFSa~M  
 BITMAPFILEHEADER bfh; G$b4`wt  
 bfh.bfReserved1=bfh.bfReserved2=0; G <q@K-  
 bfh.bfType=((WORD)('M'<< 8)|'B'); hyp`6?f  
 bfh.bfSize=54+size; N8TO"`wdbs  
 bfh.bfOffBits=54; K(^x)w r-:  
 CFile bf; }2S \-  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ oCS NA.z  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); xAflcY>Ozs  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); 'I2)-=ZL6  
  bf.WriteHuge(lpData,size); IcZ'KV  
  bf.Close(); NR5A"_'  
  nCount++; =k z;CS+  
 } [#tW$^UD  
 GlobalFreePtr(lpData); /e\dsC{uJ  
 if(nCount==1) y:L|]p}huE  
  m_Number.Format("%d picture captured.",nCount); zoU.\]#C  
 else 57r)&8  
  m_Number.Format("%d pictures captured.",nCount); .IgQn|N  
  UpdateData(FALSE); jQhf)B  
} PZs  
Z:Wix|,ONS  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) TH-^tw  
{ M<729M  
 if(pMsg -> message == WM_KEYDOWN) IP3-lru  
 { yY+2;`CH  
  if(pMsg -> wParam == VK_ESCAPE) 6-~  
   return TRUE; Velmq'n  
  if(pMsg -> wParam == VK_RETURN) foeVjL:T  
   return TRUE; t j0vB]c  
 } Dcf`+?3  
 return CDialog::PreTranslateMessage(pMsg); [Zf<r1m  
} Jc+U$h4  
V-31x)  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) k1<Py$9"  
{ >cp9{+#f  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ -'2.^a-8-g  
  SaveBmp(); E$T#o{pai  
  return FALSE; _rM%N+$&d_  
} fITml6mbE  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ Vswi /(  
 CMenu pop; P|?z1JUd  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); >Et?7@   
 CMenu*pMenu=pop.GetSubMenu(0); U6Qeode  
 pMenu->SetDefaultItem(ID_EXITICON); {2nXItso  
 CPoint pt; ATU@5,9  
 GetCursorPos(&pt); 1\2 m'o  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); ]k Pco4  
 if(id==ID_EXITICON) Dj|S  
  DeleteIcon(); ` C1LR,J  
 else if(id==ID_EXIT) (R, eWWF8~  
  OnCancel(); ?OSd8E+itM  
 return FALSE; i0P+,U  
} "YBA$ef$  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); _C4^J  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) r{btBv  
 AddIcon(); V6L_aee}CK  
 return res; M$)+Uo 2  
} ~^eAS;  
Wwz>tE  
void CCaptureDlg::AddIcon() PIA&s6U  
{ N  P"z  
 NOTIFYICONDATA data; ;# {x_>M  
 data.cbSize=sizeof(NOTIFYICONDATA); (7IF5g\  
 CString tip; Q*wx6Pu8  
 tip.LoadString(IDS_ICONTIP); _YY)-H  
 data.hIcon=GetIcon(0); }LRAe3N%8  
 data.hWnd=GetSafeHwnd(); I4*N  
 strcpy(data.szTip,tip); ^Iz.O  
 data.uCallbackMessage=IDM_SHELL; sw&Qks? V  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; v6GWD}HH,  
 data.uID=98; Zj JD@,j  
 Shell_NotifyIcon(NIM_ADD,&data); %F7aFvl*  
 ShowWindow(SW_HIDE); ^ey\ c1K  
 bTray=TRUE; WM#!X!Vo  
} IH0Uq_  
0C7"*H0 R  
void CCaptureDlg::DeleteIcon() bhI8b/  
{ x\=h^r#w  
 NOTIFYICONDATA data; myo/}58Nv  
 data.cbSize=sizeof(NOTIFYICONDATA); s[g1e i9  
 data.hWnd=GetSafeHwnd(); Mf *qr9*  
 data.uID=98; c]9OP9F  
 Shell_NotifyIcon(NIM_DELETE,&data); 1vThb  
 ShowWindow(SW_SHOW);  D;5RcZ  
 SetForegroundWindow(); s^U^n//  
 ShowWindow(SW_SHOWNORMAL); F,D &  
 bTray=FALSE; V$@2:@8mo  
} vD(;VeW[  
VS` S@+p  
void CCaptureDlg::OnChange() dU\fC{1Z  
{ T|m+ULp~  
 RegisterHotkey(); ~$@I <=L  
} e'ZgF~  
3lJK[V{'#'  
BOOL CCaptureDlg::RegisterHotkey() aV ^2  
{ 6QV/8IX  
 UpdateData(); B<)(7GTv7"  
 UCHAR mask=0; 8dpVB#]pp,  
 UCHAR key=0; (T^aZuuS  
 if(m_bControl) vL><Y.kOEs  
  mask|=4; emHi= [!i  
 if(m_bAlt) \KEL.}B9E  
  mask|=2; njIvVs`q  
 if(m_bShift) lRrOoON  
  mask|=1; P k,^q8;  
  key=Key_Table[m_Key.GetCurSel()]; FUH1Z+9  
 if(bRegistered){ ^b%AwzHH}  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); 1/gh\9h  
  bRegistered=FALSE; C /E3NL8  
 } H1w;Wb1se  
 cMask=mask; +V) (,f1  
 cKey=key; QW!'A`*x  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); }A#FGH +  
 return bRegistered; >?kt3.IQ!X  
} qjWgyhL  
JmBYD[h,  
  四、小结 *)w 8fq  
J:>TV.TP  
  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
批量上传需要先选择文件,再选择上传
认证码:
验证问题:
3+5=?,请输入中文答案:八 正确答案:八