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
  • 5431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: X2sK<Qluql  
  {"4t`dM  
  一、实现方法 r+$ 0u~^  
etGquW.  
  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: ;zz"95X7  
LnR3C:NO k  
#pragma data_seg("shareddata") +wT,dUin_<  
HHOOK hHook =NULL; //钩子句柄 7 yF#G9,  
UINT nHookCount =0; //挂接的程序数目 EEaKT`/d  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 /R@(yT=t  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 <|.S~HLTQ  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey @LwhQ  
static int KeyCount =0; sM~CP zMa  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 +R#*eo;o7  
#pragma data_seg() Nnv&~ D>  
,0#OA* 0B  
  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。 ?nU V3#6{  
7"8HlOHA  
  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: jzzVZ%t  
}yB@?  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR mc9$"  
cKey,UCHAR cMask) 3PBg3Y$  
{ j|+B|   
 BOOL bAdded=FALSE; r("7 X2f  
 for(int index=0;index<MAX_KEY;index++){ Wy4v~]xd%  
  if(hCallWnd[index]==0){ ~zYp(#0op  
   hCallWnd[index]=hWnd; 'HOcK8}b  
   HotKey[index]=cKey; E*RP8  
   HotKeyMask[index]=cMask; hkW"D<i i-  
   bAdded=TRUE; T 0^U ]C  
   KeyCount++; U0)(k}Q)  
   break; Qy4AuMU2  
  } @X4;fd  
 } \6C"bQ  
 return bAdded; [vV-0Lx"  
} Ep0Aogp29  
//删除热键 N}Q,  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) C-4I e  
{ sU+~#K$ b  
 BOOL bRemoved=FALSE; s,` n=#  
 for(int index=0;index<MAX_KEY;index++){ +{Q\B}3cj1  
  if(hCallWnd[index]==hWnd){ i<%(Z[9Lk  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ .dM 0  
    hCallWnd[index]=NULL; /a9+R)Al  
    HotKey[index]=0; zRf]SZ(t O  
    HotKeyMask[index]=0; 14zo0ANM  
    bRemoved=TRUE; fI}-?@  
    KeyCount--; LJI&j \  
    break; I -;JDC?  
   } sH+]lTSX6{  
  } QouTMS-b  
 } G.<9K9K  
 return bRemoved; C'zMOR6c  
} tx5@r;  
gs0,-)  
:%!SzI?  
  DLL中的钩子函数如下: Txp~&a03  
_VY]  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) X}p4yR7'  
{ BAzqdG  
 BOOL bProcessed=FALSE; ^!kv gm<{$  
 if(HC_ACTION==nCode) 1b_ ->_9  
 { k$I[F<f  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 Dw.>4bA.  
   switch(wParam) B5tJ|3!  
   {  ,ew<T{PL  
    case VK_MENU: ",~3&wx  
     MaskBits&=~ALTBIT; EE%OD~u&9#  
     break; ?$r+#'asd(  
    case VK_CONTROL: ! '2'db  
     MaskBits&=~CTRLBIT; u# %7>=  
     break; &s] s]V)  
    case VK_SHIFT: egP3q5~  
     MaskBits&=~SHIFTBIT; k W-5H;>  
     break; NWoZDsu  
    default: //judge the key and send message T,H]svN5p  
     break; %81tVhg  
   } `_<AZ{&&  
   for(int index=0;index<MAX_KEY;index++){ qTffh{q V  
    if(hCallWnd[index]==NULL) -R&h?ec  
     continue; b_wb!_  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) %lV>Nc|iz=  
    { w)!(@}vd  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); BE3~f6 `  
     bProcessed=TRUE; CTPn'P=\C  
    } c/g(=F__[  
   } y`(z_5ClT  
  } B]]M?pS  
  else if((lParam&0xc000ffff)==1){ //有键按下 6j` waK  
   switch(wParam) MJ92S(  
   { 4@8i,q>  
    case VK_MENU: }n:-nB4  
     MaskBits|=ALTBIT; tQwbIX-7/  
     break; ngdVRJL  
    case VK_CONTROL: v $ pA Rt  
     MaskBits|=CTRLBIT; G~m(&,:Mu  
     break; V8,$<1Fi;-  
    case VK_SHIFT: pw(`+x]  
     MaskBits|=SHIFTBIT; co~TQpy^  
     break; <(^-o4Cl  
    default: //judge the key and send message ^2=Jv.2{|  
     break; ]%mg(&p4  
   } YY]LK%-  
   for(int index=0;index<MAX_KEY;index++){ 4Y-9W2s  
    if(hCallWnd[index]==NULL) o +aB[+  
     continue; 71)HxC[6vA  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) 2;kab^iv'  
    { E6@+w.VVO  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); A\SbuRty  
     bProcessed=TRUE; N%Lh_2EzqV  
    } F htf4  
   } 9_TZ;e  
  } O#k?c }  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 e7hPIG  
   for(int index=0;index<MAX_KEY;index++){ <BO|.(ys  
    if(hCallWnd[index]==NULL) *$hO C%(  
     continue; - iJ[9O  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) xQmk2S` y  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); G`)I _uO  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 [&Qrk8EN  
   } (Ojg~P4;&  
  } 8fDnDA.e  
 } Dnd  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); tcRK\  
} y:v0& 9L  
#z5'5|3  
  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: M8g=t[\  
*XNvb ^<  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask);  c<4pu  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); bAW;2 NB  
H=wmN0s{<  
  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: K IqF"5  
Kh5:+n_X  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) K zM\+yC  
{ aV>w($tdd  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) !\!fd(BN  
 { ?m~;*wn%  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 xy|;WB  
  SaveBmp(); 63k8j[$  
  return FALSE; IAtc^'l#  
 } Fa>Y]Y0r  
 …… //其它处理及默认处理 QU417EV'  
} Q)Ppx7)  
=e ;\I/  
9MGA#a  
  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)<>} y  
yyiZV\ /  
  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。 778L[wYe  
5))?,YkrrI  
  二、编程步骤 "+7~C6[s  
!E$S&zVMQ  
  1、 启动Visual C++,生成一个DLL项目和一个基于对话框的应用程序项目,并将两个项目分别命名为"Hook"和"Capture"; +\}]`uS:  
5g/WQo\  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; A70_hhP  
S"}FsS;k<?  
  3、 在"Capture"项目中按照图一所示设置对话框的界面,具体设置参见代码部分; S'?XI@t[  
38  B\ \  
  4、 使用Class Wizard在"Capture"项目中添加按钮的鼠标单击消息响应函数,并重载对话框的WindowProc()函数; ^ ]`<nO  
6}|/~n  
  5、 添加代码,编译运行程序。 8LkC/  
;GvyL>|-~  
三、程序代码 IOfo]p-  
(]iw#m{  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL Nf$Y-v?i  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) @gTpiV2  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ L5e aQu  
#if _MSC_VER > 1000 q4U?}=PD  
#pragma once fT 8"1f|w  
#endif // _MSC_VER > 1000 /'">H-r  
#ifndef __AFXWIN_H__ KsHovv-A  
#error include 'stdafx.h' before including this file for PCH e[{LNM{/#  
#endif C \}m_`MR  
#include "resource.h" // main symbols X1A;MA@0Ro  
class CHookApp : public CWinApp )"f>cYF  
{ Q&n|tQ*4  
 public: YDDwvk H  
  CHookApp(); ;rk}\M$+  
  // Overrides JU"!qXQr  
  // ClassWizard generated virtual function overrides bC)<AG@Z\  
  //{{AFX_VIRTUAL(CHookApp) LkNfcBa_  
 public: Mu{mj4Y{  
  virtual BOOL InitInstance(); E!ZDqq  
  virtual int ExitInstance(); 2{{M{#}S.  
  //}}AFX_VIRTUAL C~6aX/:  
  //{{AFX_MSG(CHookApp) f2yc]I<lr~  
  // NOTE - the ClassWizard will add and remove member functions here. b7"pm)6  
  // DO NOT EDIT what you see in these blocks of generated code ! SHh g&~B  
  //}}AFX_MSG N*@bJ*0  
  DECLARE_MESSAGE_MAP() *d(wO l5[  
}; i(YP(8  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); m ;[z)-&"  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); FJ#V"|}  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); ~tz[=3!1H  
BOOL InitHotkey(); DhB: 8/J  
BOOL UnInit(); 3>?ip;  
#endif g#Yqw  
2t[inzn=E  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. WL$WWA08_  
#include "stdafx.h" )u[ 2TI1  
#include "hook.h" abI[J]T9G  
#include <windowsx.h> o5zth^p[  
#ifdef _DEBUG {!E<hQ2<$9  
#define new DEBUG_NEW a eP4%h  
#undef THIS_FILE UpB7hA  
static char THIS_FILE[] = __FILE__; ,=K!Y TeVl  
#endif M*0&3Y Z  
#define MAX_KEY 100 J }JT%S W  
#define CTRLBIT 0x04 1R,n[`}h  
#define ALTBIT 0x02 %OW[rbE.  
#define SHIFTBIT 0x01 fzSZ>I0R  
#pragma data_seg("shareddata") I ][8[UZ  
HHOOK hHook =NULL; Lw-j#}&6E  
UINT nHookCount =0; +IJpqFH  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey /&ph-4\i  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT Lu-owP7nB  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey @NX^__ sa  
static int KeyCount =0; MA"iM+Ar  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift @dcW0WQ\  
#pragma data_seg() 6 *Q5.g  
HINSTANCE hins; LscAsq<H<  
void VerifyWindow(); f'r/Q2{n  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) {feS-.Khv  
//{{AFX_MSG_MAP(CHookApp) Wx:_F;  
// NOTE - the ClassWizard will add and remove mapping macros here. Gb~q:&IUr  
// DO NOT EDIT what you see in these blocks of generated code! ZwG+rTW  
//}}AFX_MSG_MAP I,?bZ&@8  
END_MESSAGE_MAP() }eB\k,7L  
i?|K+"=D  
CHookApp::CHookApp() gR1X@j$_  
{ +n)(\k{  
 // TODO: add construction code here, i 0L7`TB  
 // Place all significant initialization in InitInstance Zwq uS9  
} 8l)l9;4 6  
b8QW^Z  
CHookApp theApp; 5%G++oLXf  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) $\a;?>WA"  
{ B&L{/.v_z\  
 BOOL bProcessed=FALSE; tD>m%1'&  
 if(HC_ACTION==nCode) 6x -PGq  
 { 5X~ko>  
  if((lParam&0xc0000000)==0xc0000000){// Key up V&GFGds  
   switch(wParam) )P|Ql-rE4  
   { }KZ/>Z;^  
    case VK_MENU: b6Ntt Y!3  
     MaskBits&=~ALTBIT; 8N|*n"`}  
     break; u5idH),<  
    case VK_CONTROL: EiT raWV"O  
     MaskBits&=~CTRLBIT; {d )Et;_  
     break;  .# M 5L  
    case VK_SHIFT: #|$7. e  
     MaskBits&=~SHIFTBIT; oNiS"\t  
     break; VgoQz]z  
    default: //judge the key and send message E$Ge# M@dM  
     break; $SXF>n{}  
   } Ke,-8e#Q  
   for(int index=0;index<MAX_KEY;index++){ Oq!u `g9  
    if(hCallWnd[index]==NULL) MTqbQ69v  
     continue; %DRDe  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) Ppx*  
    { s/A]&! `  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); Q/0}AQO  
     bProcessed=TRUE; J-X5n 3I&  
    } Vy(lyD<6  
   } !!` zz  
  } 2$3BluK  
  else if((lParam&0xc000ffff)==1){ //Key down 0<>iMrD  
   switch(wParam) gXf_~zxS  
   { gR?3)m  
    case VK_MENU: m]u#Dm7h  
     MaskBits|=ALTBIT; J qU%$[w  
     break; $p9XXZ"*  
    case VK_CONTROL: b?bIxCA8  
     MaskBits|=CTRLBIT; 6+LX oR'  
     break; qo}kwwWN;  
    case VK_SHIFT: [N$@nA-d  
     MaskBits|=SHIFTBIT; *nC<1.JW  
     break; t?c*(?Xa  
    default: //judge the key and send message r#{lpF,3Ib  
     break; iPkG=*Ip(%  
   } ] c'owj  
   for(int index=0;index<MAX_KEY;index++) PUlb(3p `  
   { [;X YT  
    if(hCallWnd[index]==NULL) ~I'Z=Wo  
     continue; xds"n5  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) r2xlcSn%  
    { Q'\jm=k  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); $G=\i>R.  
     bProcessed=TRUE; _abVX#5<  
    } hSg: Rqnk  
   } 4wNxn lP  
  } $9b||L  
  if(!bProcessed){ IA+>dr  
   for(int index=0;index<MAX_KEY;index++){ E!Ng=}G&_  
    if(hCallWnd[index]==NULL) 6 a$%  
     continue; tB1Qr**  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) _IY)<'d  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); tKJ) 'v?  
   } Gn_v}31d%  
  } -''vxt?7H&  
 } 525xm"Bs  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); fnXl60C%  
} uM4,_)L  
0 TS:o/{(a  
BOOL InitHotkey() bUqO.FZ[  
{ %Z}dY~:  
 if(hHook!=NULL){ WcUeWGC>  
  nHookCount++; E+3~w?1  
  return TRUE; Riw>cVi~  
 } p=r{ODw#3  
 else s5z@`M5'm  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); {O"dj;RU  
  if(hHook!=NULL) C6, Bqlio  
   nHookCount++; O&X-)g=  
  return (hHook!=NULL); _VMJq9.  
} ! q1Ql18n  
BOOL UnInit() %%DK?{jo`  
{ Wh4lz~D\@  
 if(nHookCount>1){ B! -W765Y  
  nHookCount--; j#~4JGZt  
  return TRUE; 54 8@._-S  
 } dm.3.xXq  
 BOOL unhooked = UnhookWindowsHookEx(hHook); *&AK.n_  
 if(unhooked==TRUE){ 1w5p*U0 ;  
  nHookCount=0; &GbCJ  
  hHook=NULL; ({i|  
 } I5D\Z  
 return unhooked; 0\ gE^=o[  
} w$t2Hd  
f,?7,?x  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) '7=*n_l  
{ wicg8[T=B  
 BOOL bAdded=FALSE; }M9'N%PU  
 for(int index=0;index<MAX_KEY;index++){ =+"XV8Fi,  
  if(hCallWnd[index]==0){ uZ'5&k96T  
   hCallWnd[index]=hWnd; wYF)G;[wM  
   HotKey[index]=cKey; Dic(G[  
   HotKeyMask[index]=cMask; }- +;{u  
   bAdded=TRUE; CiMN J  
   KeyCount++; o= 8yp2vG  
   break; fmSA.z  
  } 3Y r   
 } O0Z'vbFG  
 return bAdded; DSIa3! 0  
} Fm2t:,=  
f.8L<<5 c  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) 7"S|GEs:  
{ kPxrI=  
 BOOL bRemoved=FALSE; {fS/ZG"5<t  
 for(int index=0;index<MAX_KEY;index++){ Dbtw>:=  
  if(hCallWnd[index]==hWnd){ I4") ;T3  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ :r~?Z6gK  
    hCallWnd[index]=NULL; hz/5k%%UX  
    HotKey[index]=0; qI'a|p4fn?  
    HotKeyMask[index]=0; '<@PgO~  
    bRemoved=TRUE; @cXY"hP`  
    KeyCount--; 0Ifd!  
    break; lOE bh  
   } *vj5J"Y(;t  
  } (d~'H{q  
 } 8EP^M~rv  
 return bRemoved; RZz].Nx  
} C( r?1ma  
2Hq!YsJ4]  
void VerifyWindow() c(eu[vj:  
{ K1C#  
 for(int i=0;i<MAX_KEY;i++){ >uUbWKn3  
  if(hCallWnd!=NULL){ >o[T#U  
   if(!IsWindow(hCallWnd)){ f^]2qoN  
    hCallWnd=NULL; bGSgph  
    HotKey=0; _x>u "w  
    HotKeyMask=0; ciXAyT cG  
    KeyCount--; HAU8H'h  
   } 9:esj{X  
  } 4e5Ka{# <  
 } 00 $W>Gr  
} -MU^%t;-  
`rM-b'D  
BOOL CHookApp::InitInstance() EGa}ml/G  
{ +XIN-8  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); !G8SEWP  
 hins=AfxGetInstanceHandle(); 0_j!t  
 InitHotkey(); `9F'mT#o/  
 return CWinApp::InitInstance(); K1$Z=]a+  
} \"uR&D  
T0Gu(c`1d  
int CHookApp::ExitInstance() *=ALns?y  
{ apYf,"|9  
 VerifyWindow(); N(IUNL  
 UnInit(); irL ehPX9  
 return CWinApp::ExitInstance(); iKdC2m  
} gFW1Nm_DJ  
PgxU;N7Y  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file R!-RSkB  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) <4VUzgX2  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ 3 =S.-  
#if _MSC_VER > 1000 f:=?"MX7  
#pragma once muY4:F.C(  
#endif // _MSC_VER > 1000 mH8"k+k  
=?/J.[)<*  
class CCaptureDlg : public CDialog \?}ZXKuJj  
{ ABx0IdOcI  
 // Construction !e%#Zb MIo  
 public: kdv>QZ  
  BOOL bTray; UyvFR@  
  BOOL bRegistered; <7)@Jds\  
  BOOL RegisterHotkey(); /FQumqbnt  
  UCHAR cKey; gsZCWT  
  UCHAR cMask; 2B*9]AHny  
  void DeleteIcon(); J NsK   
  void AddIcon(); u9?85  
  UINT nCount; 7o ;}"Y1  
  void SaveBmp(); uODpIxN  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor J \G8 g,@  
  // Dialog Data N7[i443a  
  //{{AFX_DATA(CCaptureDlg) v/(< fI^  
  enum { IDD = IDD_CAPTURE_DIALOG }; T3Tk:r  
  CComboBox m_Key; 0chBw~@*s  
  BOOL m_bControl; d*!,McBn  
  BOOL m_bAlt; `s.y!(`q  
  BOOL m_bShift; O!;!amvz  
  CString m_Path; 44cyD _(  
  CString m_Number; z*kn.sW  
  //}}AFX_DATA 4s3n|6v  
  // ClassWizard generated virtual function overrides VdYu| w ;v  
  //{{AFX_VIRTUAL(CCaptureDlg) ?}O\'Fa8  
 public: 7$/ O{GBJ  
  virtual BOOL PreTranslateMessage(MSG* pMsg); k%.IIVRx  
 protected: fRq2sK;+  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support ;Qw>&24h[  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); F_@PSA+  
  //}}AFX_VIRTUAL *)"`v]  
  // Implementation (LGx;9S?  
 protected: !d^5mati)T  
  HICON m_hIcon; >7 4'g }  
  // Generated message map functions r`mfLA]d  
  //{{AFX_MSG(CCaptureDlg) x! Z|^q  
  virtual BOOL OnInitDialog(); 6o {41@v(  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); _,~/KJp  
  afx_msg void OnPaint(); z}kD:A)a  
  afx_msg HCURSOR OnQueryDragIcon(); K /. ;N.9  
  virtual void OnCancel(); >/-<,,<\C  
  afx_msg void OnAbout(); @m#7E4 +  
  afx_msg void OnBrowse(); 02bv0  
  afx_msg void OnChange(); o-49o5:1  
 //}}AFX_MSG ?7(`2=J  
 DECLARE_MESSAGE_MAP() St'3e<  
}; |wWBV{^  
#endif `a  
zQ5'q  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file /\OjtE  
#include "stdafx.h" \V}?K0#bt  
#include "Capture.h" Z^s&]  
#include "CaptureDlg.h" mpN|U(n  
#include <windowsx.h> ;CFI*Wfp  
#pragma comment(lib,"hook.lib") >P/.X^G0  
#ifdef _DEBUG IhY[c/ |i  
#define new DEBUG_NEW LzP+l>m  
#undef THIS_FILE P>Pw;[b>O  
static char THIS_FILE[] = __FILE__; ^!?W!k!:V  
#endif F"~uu9u  
#define IDM_SHELL WM_USER+1 ?!cUAa>iH  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); f)/Yru. ;  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); ub7|'+5  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; /+iU1m'(  
class CAboutDlg : public CDialog Uz[#t1*  
{ ?%#3p[  
 public: [gx6e 44  
  CAboutDlg(); wxN'Lv=R  
  // Dialog Data t4~Bn<=  
  //{{AFX_DATA(CAboutDlg) P^T]Ubv"  
  enum { IDD = IDD_ABOUTBOX }; 0LN"azhz  
  //}}AFX_DATA x^xlH!Sc  
  // ClassWizard generated virtual function overrides ms`R ^6Ra  
  //{{AFX_VIRTUAL(CAboutDlg) YyjnyG  
 protected: sO,,i]a0  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support &O7]e3Ej  
  //}}AFX_VIRTUAL p^<*v8,~7  
  // Implementation r3{Cuz  
 protected: QS\H[?M$  
  //{{AFX_MSG(CAboutDlg) {OH "d  
  //}}AFX_MSG SI^!e1@M[  
  DECLARE_MESSAGE_MAP() #px74EeI\  
}; y)CnH4{  
Hj2E-RwG  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) s<h]2W  
{ T2Ms/1FH/@  
 //{{AFX_DATA_INIT(CAboutDlg) { ZrIA+eH  
 //}}AFX_DATA_INIT zU}Ru&T9  
} 8t25wPlx  
)E;B'^RVR  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) K!=Y4"5%  
{ 33:{IV;k  
 CDialog::DoDataExchange(pDX); g\ilK:r}  
 //{{AFX_DATA_MAP(CAboutDlg) k><k|P[|  
 //}}AFX_DATA_MAP 4$~eG"wu  
} {mr!E  
6F !B;D-Q  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) : M=0o<  
 //{{AFX_MSG_MAP(CAboutDlg) U["'>&B  
 // No message handlers (kCzz-_\  
 //}}AFX_MSG_MAP w&8N6gA14  
END_MESSAGE_MAP() .hPk}B/KV  
=ss(~[  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) 8eGq.+5G  
: CDialog(CCaptureDlg::IDD, pParent) k[#<=G_=/E  
{ ae_Y?g+3  
 //{{AFX_DATA_INIT(CCaptureDlg) lkl+o&D9  
  m_bControl = FALSE; td@I ;d2  
  m_bAlt = FALSE; 3k3-Ts  
  m_bShift = FALSE; /Ps/m!  
  m_Path = _T("c:\\"); 8A'oK8Q  
  m_Number = _T("0 picture captured."); QM wrt  
  nCount=0; 3)cH\gsg9  
  bRegistered=FALSE; AAuH}W>n  
  bTray=FALSE; >BFUts%  
 //}}AFX_DATA_INIT ~}Xd{afo  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 !Pd@0n4  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); "{>BP$Jz  
} n-P<y  
1u>[0<U~E  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) x *:v]6y  
{ ]L)l5@5^  
 CDialog::DoDataExchange(pDX); ?DJ/Yw>>3  
 //{{AFX_DATA_MAP(CCaptureDlg) OYW:I1K<5  
  DDX_Control(pDX, IDC_KEY, m_Key); &UrPb%=2H  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); 2PZ#w(An&  
  DDX_Check(pDX, IDC_ALT, m_bAlt); 'vCl@x$  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); = j)5kY`  
  DDX_Text(pDX, IDC_PATH, m_Path); [/E|n[Bx  
  DDX_Text(pDX, IDC_NUMBER, m_Number); \D6 7J239E  
 //}}AFX_DATA_MAP l5P!9P  
} <UsFBF  
&l M=>?  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) U</Vcz  
//{{AFX_MSG_MAP(CCaptureDlg) 9 696EQ,I  
 ON_WM_SYSCOMMAND() fj"1TtPq#  
 ON_WM_PAINT() V) xwlvX  
 ON_WM_QUERYDRAGICON() U-+o6XX  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) W=G8l%  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) AcHr X=O  
 ON_BN_CLICKED(ID_CHANGE, OnChange) aoqG*qh}b  
//}}AFX_MSG_MAP [Z]%jABR  
END_MESSAGE_MAP() -<0xS.^  
88uoA6Y8h  
BOOL CCaptureDlg::OnInitDialog() 10}< n_I  
{ -8zdkm8k  
 CDialog::OnInitDialog(); tEuVn5  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); :Eb=jWA  
 ASSERT(IDM_ABOUTBOX < 0xF000); s$g3__|Y  
 CMenu* pSysMenu = GetSystemMenu(FALSE); #|j8vmfn$e  
 if (pSysMenu != NULL) a=_:`S]}  
 { CWdpF>En  
  CString strAboutMenu; #M ;j*IBl*  
  strAboutMenu.LoadString(IDS_ABOUTBOX); >bRoQ8  
  if (!strAboutMenu.IsEmpty()) `_"loPu  
  { "50 c<sZSB  
   pSysMenu->AppendMenu(MF_SEPARATOR); *(g0{V  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); zu_bno!  
  } _9f7@@b  
 } yOTC>?p%  
 SetIcon(m_hIcon, TRUE); // Set big icon D/)E[Fv+  
 SetIcon(m_hIcon, FALSE); // Set small icon E[NszM[P  
 m_Key.SetCurSel(0); *q-VY[2  
 RegisterHotkey(); (l+0*o,(  
 CMenu* pMenu=GetSystemMenu(FALSE); dD351!-  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); 0<FT=tKm  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); EQ [K  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); 7TW&=(  
 return TRUE; // return TRUE unless you set the focus to a control gT_tR_g  
} 8hV>Q  
)ko[_OJj  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) XOL_vS24  
{ FJD;LpW  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) NG5k9pJ  
 { O $ARk+  
  CAboutDlg dlgAbout; #g#[|c.  
  dlgAbout.DoModal(); ]P*H,&I`#  
 } laRn![[  
 else Cy\ o{6  
 { cv5+[;(b  
  CDialog::OnSysCommand(nID, lParam); 50e vWD  
 } RF}R~m9]  
} ^U9b)KA  
&q>C  
void CCaptureDlg::OnPaint() >H5_,A}f  
{ $9@3dM*E?Z  
 if (IsIconic()) .I Io   
 { $sFqMy  
  CPaintDC dc(this); // device context for painting LEg ?/!LIT  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); B{K_?ae!  
  // Center icon in client rectangle  eIj2(q9  
  int cxIcon = GetSystemMetrics(SM_CXICON); ]tNB^  
  int cyIcon = GetSystemMetrics(SM_CYICON); Gs/G_E(T  
  CRect rect; SveP:uJA[  
  GetClientRect(&rect); %O9P|04]3  
  int x = (rect.Width() - cxIcon + 1) / 2; gI/ SA  
  int y = (rect.Height() - cyIcon + 1) / 2; gb=tc`  
  // Draw the icon q{}U5(,{0  
  dc.DrawIcon(x, y, m_hIcon); ?aQVaw&L!7  
 } rRX F@  
 else -amNz.`[PR  
 { O[8wF86R  
  CDialog::OnPaint(); FI@kE19  
 } -I:L6ft8  
} 6?'; ip  
8&:dzS  
HCURSOR CCaptureDlg::OnQueryDragIcon() V#+M lN  
{ ZEB,Q~  
 return (HCURSOR) m_hIcon; &8dj*!4H  
} 79 \SbB  
]P2Wa   
void CCaptureDlg::OnCancel() Wb5n> *  
{ N97WI+`  
 if(bTray) mUfANlQ:  
  DeleteIcon(); zG7y$\A  
  CDialog::OnCancel(); swg*fhJFB  
} G[+{[W  
WtlLqD!_D  
void CCaptureDlg::OnAbout() &x3R+(H {  
{ 1QbD]"=n  
 CAboutDlg dlg; * Na8w'Q  
 dlg.DoModal(); 3 jghV?I{T  
} -+0!Fkt@,  
&23{(]eO  
void CCaptureDlg::OnBrowse() }}LjEOvL=  
{ CpU y~  
 CString str; $'w>doUlA  
 BROWSEINFO bi; Yq:+.UU  
 char name[MAX_PATH]; l]L"Ex{  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); $VeQvm*  
 bi.hwndOwner=GetSafeHwnd(); { 3Qlx/6<  
 bi.pszDisplayName=name; g6H`uO  
 bi.lpszTitle="Select folder"; brdY97s4  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; n],"!>=+  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); 7Q|v5@;pU  
 if(idl==NULL) .X"\ Mg  
  return; dW%;Z  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); E8.1jCL>{"  
 str.ReleaseBuffer(); o;v_vCLO  
 m_Path=str; -+Z&O?pSH  
 if(str.GetAt(str.GetLength()-1)!='\\') loD:4e1  
  m_Path+="\\"; S Q`KR'E  
 UpdateData(FALSE); J@IF='{  
} #U6~U6@  
lrmz'M'  
void CCaptureDlg::SaveBmp() v{) *P.E  
{ [ z{ }?  
 CDC dc; 8p]Krs:  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); )5x,-m@  
 CBitmap bm; # "TL*p  
 int Width=GetSystemMetrics(SM_CXSCREEN); W3xObt3w\  
 int Height=GetSystemMetrics(SM_CYSCREEN); 9-.`~v  
 bm.CreateCompatibleBitmap(&dc,Width,Height); 5r^u7k  
 CDC tdc; 2SYV2  
 tdc.CreateCompatibleDC(&dc); nC\LDeKc  
 CBitmap*pOld=tdc.SelectObject(&bm); N#^o,/  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); fRt&-z('  
 tdc.SelectObject(pOld); qbo W<W<H1  
 BITMAP btm; 960rbxKy3  
 bm.GetBitmap(&btm); fn.}LeeS>  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; t7/a5x  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); ~t^'4"K*  
 BITMAPINFOHEADER bih; wTn"  
 bih.biBitCount=btm.bmBitsPixel; \P9HAz'6  
 bih.biClrImportant=0; $kh6-y@  
 bih.biClrUsed=0; )z7+%nTO  
 bih.biCompression=0; \Bn$b2j!%  
 bih.biHeight=btm.bmHeight; '.zr:l  
 bih.biPlanes=1; !%'c$U2  
 bih.biSize=sizeof(BITMAPINFOHEADER); AA K}t6  
 bih.biSizeImage=size; #+;0=6+SM  
 bih.biWidth=btm.bmWidth; 0{>P^z  
 bih.biXPelsPerMeter=0; *%QTv3{  
 bih.biYPelsPerMeter=0; zg{  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); 1y.!x~Pi,  
 static int filecount=0; y73@t$|  
 CString name; ]ChN]>o  
 name.Format("pict%04d.bmp",filecount++); !}Ty"p`  
 name=m_Path+name; w]Ci%W(  
 BITMAPFILEHEADER bfh; Q".AmHn  
 bfh.bfReserved1=bfh.bfReserved2=0; MU~nvs;:  
 bfh.bfType=((WORD)('M'<< 8)|'B'); FhMl+Ou  
 bfh.bfSize=54+size; zqb3<WP"  
 bfh.bfOffBits=54; WQ1*)h8,9  
 CFile bf; ^/jALA9!  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ ]|/\Sd  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); !Baq4V?KN  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); ysQ8==`38i  
  bf.WriteHuge(lpData,size); CfjVx   
  bf.Close(); ~[ x}  
  nCount++; !S[7IBk%  
 } sme!!+Rd  
 GlobalFreePtr(lpData); S)*!jI  
 if(nCount==1) |I=\+P}s  
  m_Number.Format("%d picture captured.",nCount); )-d &XN7  
 else B#(2,j7M  
  m_Number.Format("%d pictures captured.",nCount); mYqRN1%  
  UpdateData(FALSE); qjd8Q  
} t 5  
#'Lt_Yf!  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) =]F15:%Z q  
{ \B D'"  
 if(pMsg -> message == WM_KEYDOWN) qGKQrb,K  
 { FrD,)Ad8Q  
  if(pMsg -> wParam == VK_ESCAPE) ahm@ +/2  
   return TRUE; 2~SjRIpUw  
  if(pMsg -> wParam == VK_RETURN) j!QP>AM|`  
   return TRUE; vq*)2.  
 } }_o!f V  
 return CDialog::PreTranslateMessage(pMsg); `K \(I#z  
} 9-N*Jhg  
yX;v   
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) s~Od(,K  
{ zmh3 Qa(  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ U)gr C8 C  
  SaveBmp(); *dm?,~f%<  
  return FALSE; C6(WnO{6  
} (eJYv: ^  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ -4'yC_8t  
 CMenu pop; KRh95B GU  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); IBr|A  
 CMenu*pMenu=pop.GetSubMenu(0); 4).>b3OhX  
 pMenu->SetDefaultItem(ID_EXITICON); ~F9WR5}]  
 CPoint pt; ^ql+l~  
 GetCursorPos(&pt); Ga} &%  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); _rf  
 if(id==ID_EXITICON) nyR4E}@:O  
  DeleteIcon(); 7ezf.[{R  
 else if(id==ID_EXIT) l/w<R  
  OnCancel(); kKR Z79"7s  
 return FALSE; VC@{cVT  
} @AU<'?k  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); #v`J]I)$  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) =e$6o2!'}  
 AddIcon(); eb>YvC  
 return res; v(2|n}qY  
} |,Xrt8O/[  
_o-D},f*e  
void CCaptureDlg::AddIcon() {^VvL'n  
{ z`[q$H7?  
 NOTIFYICONDATA data; fUg I*V  
 data.cbSize=sizeof(NOTIFYICONDATA); =D2x@ank[  
 CString tip; < l%3P6|  
 tip.LoadString(IDS_ICONTIP); x0!5z1KQh  
 data.hIcon=GetIcon(0); ;Y>cegG\  
 data.hWnd=GetSafeHwnd(); RZeU{u<O  
 strcpy(data.szTip,tip); #]!0$z|Z  
 data.uCallbackMessage=IDM_SHELL; ^N5BJ'[F:  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; H#B~ h4#  
 data.uID=98; ,pz^8NJAI  
 Shell_NotifyIcon(NIM_ADD,&data); <H)I06];  
 ShowWindow(SW_HIDE); x\Det$3Kx  
 bTray=TRUE; r{gJ[%  
} 4(f4 4' ^  
S@a#,,\[  
void CCaptureDlg::DeleteIcon() 5B'};AQ  
{ Zom7yI  
 NOTIFYICONDATA data; tj_+0J$sw:  
 data.cbSize=sizeof(NOTIFYICONDATA); &[hq !v  
 data.hWnd=GetSafeHwnd(); 1>SCY _C v  
 data.uID=98; ~"+Fp&[9f  
 Shell_NotifyIcon(NIM_DELETE,&data); *M_Gu{xc  
 ShowWindow(SW_SHOW); 1MCHwX3/  
 SetForegroundWindow(); . 787+J?  
 ShowWindow(SW_SHOWNORMAL); AZCbUkq  
 bTray=FALSE; )TBG-<wt  
} \e/'d~F  
9j[%Y?  
void CCaptureDlg::OnChange() /v1Rn*VF!  
{ D$RQD{*  
 RegisterHotkey(); @,63%  
} Jyx6{O j  
/ ` 7p'i  
BOOL CCaptureDlg::RegisterHotkey() ,afh]#  
{ yH8 N8  
 UpdateData(); : qKxm(  
 UCHAR mask=0; +Zx+DW cq  
 UCHAR key=0; O&!tW^ih  
 if(m_bControl) qdB@P  
  mask|=4; ':fq  
 if(m_bAlt) MU^7(s="  
  mask|=2;  U'nz3  
 if(m_bShift) 0.+"K}  
  mask|=1; uOqWMRsoi  
  key=Key_Table[m_Key.GetCurSel()]; 1CiK&fQ'  
 if(bRegistered){ tIgKnKr^)  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); aD~3C/?aW  
  bRegistered=FALSE; m>gok0{pm  
 } c8sY#I  
 cMask=mask; :o}J u}t  
 cKey=key; a(X?N.w  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); p AzPi  
 return bRegistered; ; 2vHdN  
} `um#}ify#  
.pgTp X   
  四、小结 )jK"\'cK  
38dXfl  
  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