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
  • 6941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: -IV]U*4  
  {5  sO  
  一、实现方法 64 5z#_}C$  
8U_{|]M  
  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: W6Y@U$P#G  
D+>1]ij  
#pragma data_seg("shareddata") 0 iJue &  
HHOOK hHook =NULL; //钩子句柄 |ZQ@fmvL/p  
UINT nHookCount =0; //挂接的程序数目 X]'7Ov  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 ,~._}E&9I  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 %;D.vKoh  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey G+F: 99A  
static int KeyCount =0; !^ _ "~  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 7VP32Eh[  
#pragma data_seg() +]Y,q w  
Tyck/ EO  
  关于共享段,有几点重要的说明:一是必须在链接选项里指定该段为共享:一种方法是在project->settings->link->object/library中加上/section:shareddata,rws;第二种方法是在def文件的sections里加上一句shareddata read write shared;第三种指定共享段的方法在程序里加上一句#pragma comment(linker,"section:shareddata,rws")。二是所有的变量必须初始化,否则链接程序会把它放到普通数据段。三是如果不初始化变量,需要在段外用"__declspec(allocate("shareddata")) 变量类型 变量名"的方式定义。 M+x,opl  
"!EcbR  
  DLL中的两个输出函数分别用来添加/删除热键,函数代码如下: Fgh]KQ/5  
QPq7R  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR KZeQ47|  
cKey,UCHAR cMask) 0Zg%+)iy@  
{ '}9JCJ  
 BOOL bAdded=FALSE; Lco& Fp  
 for(int index=0;index<MAX_KEY;index++){ {%C7EAq*  
  if(hCallWnd[index]==0){ \J6j38D5  
   hCallWnd[index]=hWnd; SV(]9^nW  
   HotKey[index]=cKey; 'PP#^aI,  
   HotKeyMask[index]=cMask; ^4o;$u4R  
   bAdded=TRUE; R=KQ  
   KeyCount++; vI@%Fg+D  
   break; |n] d34E  
  } FJd]D[h  
 } qcT'nZ:  
 return bAdded; ,#8e_3Z$  
} n..g~ $k  
//删除热键 e$pMsw'MJ  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) BXyo  
{ y.q(vzg\_  
 BOOL bRemoved=FALSE; x+]\1p  
 for(int index=0;index<MAX_KEY;index++){ s8h-,@p  
  if(hCallWnd[index]==hWnd){ )K2HK&t:  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ & j+oJasI  
    hCallWnd[index]=NULL; M8TSt\  
    HotKey[index]=0; -ne Kuj  
    HotKeyMask[index]=0; uAWM \?  
    bRemoved=TRUE; =xS+5(  
    KeyCount--; hh[jN 7K  
    break; x@Hc@R<!  
   } )[Yv?>ib  
  } 2rZx Sg  
 } ,tg0L$qC  
 return bRemoved; {+@bZ}57  
} 9rA=pH%<>B  
1u9LdkhnY  
p"U, G -_  
  DLL中的钩子函数如下: yR\btx|e5~  
S1?-I_t+]  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) Kx%Sku<F'  
{ 2j&AiD  
 BOOL bProcessed=FALSE; cSm%s  
 if(HC_ACTION==nCode) B9J&=6`)  
 { ;"m ,:5%  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 Xp}Yw"7  
   switch(wParam) )=etG  
   {  6w@ Ii;  
    case VK_MENU: Y(d$  
     MaskBits&=~ALTBIT; $ O5UyKI  
     break; )<Hd T  
    case VK_CONTROL: s S7c!  
     MaskBits&=~CTRLBIT; vZBc !AW  
     break; E^ SH\5B  
    case VK_SHIFT: zO MA  
     MaskBits&=~SHIFTBIT; 9*(aU z9j  
     break; |*0<M(YXN  
    default: //judge the key and send message GbaEgA'fa  
     break; f-7 1~  
   } x UD-iSY  
   for(int index=0;index<MAX_KEY;index++){ g"> {9YE  
    if(hCallWnd[index]==NULL) # m *J&  
     continue; :dqn h  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) =i7`ek  
    { ziCHjqT  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); ,YMp<C  
     bProcessed=TRUE; aT$9;  
    } Xqm::1(-(  
   } .>IhN 5  
  } MHC^8VL  
  else if((lParam&0xc000ffff)==1){ //有键按下 wg]j+r@  
   switch(wParam) yYH0v7vx+  
   { |x-S&-  
    case VK_MENU: c?,i3s+2Y  
     MaskBits|=ALTBIT; G"XVn~]  
     break; VH1d$  
    case VK_CONTROL: =>! Y{: y(  
     MaskBits|=CTRLBIT; '^"6+k  
     break; X.e7A/ClEo  
    case VK_SHIFT: 5>\/[I/!  
     MaskBits|=SHIFTBIT; BV[5}  
     break; w&KK3*=""  
    default: //judge the key and send message n .RhxgC<  
     break;  1OF& *  
   } _}En/V_  
   for(int index=0;index<MAX_KEY;index++){ A`}rqhU.{-  
    if(hCallWnd[index]==NULL) ^:Gie  
     continue; hHMN6i  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) byfJy^8G  
    { iS<I0\D  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN);  MEGv}  
     bProcessed=TRUE; O~^"  
    } Os1>kwC  
   } n0e1k.A  
  } ]h5Yg/sms  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 YS%h^>I^  
   for(int index=0;index<MAX_KEY;index++){ y)@[Sl>  
    if(hCallWnd[index]==NULL) :65~[$2  
     continue; os]8BScx  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) <"r#:Wr  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); f|tjsZxQ  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 9BuSN*4  
   } /Dj=iBO  
  } 8!Ww J Oe  
 } u[ Yk  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); 6gs01c,BA  
}  #c66)  
|YY_^C`"-  
  抓图程序是一个基于对话框的程序,它在建立对话框的时候调用前面的DLL,登记热键,因此需要将hook.lib添加到工程里,在程序里给出两个DLL函数的定义,也可以写个头文件,再包含进来以下代码: ]f({`&K5  
]&pds\  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); M!XsJ<jN/  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); z=3\Ab  
-#HA"7XOE  
  为了添加应用程序对热键通知事件的响应,程序中用的办法是重载WindowProc()函数,该函数代码如下: hs$GN]  
0PrLuejz  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) t?'!$6   
{ ~S7 D>D3S  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) aiu5}%U  
 { @0u~?!g@  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 DS[#|  
  SaveBmp(); n@,G8=J?  
  return FALSE; e8#h3lxJ`  
 } Yd~X77cv  
 …… //其它处理及默认处理 F ;2w1S^  
} cj'}4(  
]n~ilS.rkl  
~"kb7Fxp  
  将屏幕图像保存到BMP文件中的任务是由函数SaveBmp()来完成的,具体实现参见代码部分。另外为了顺利实现屏幕抓图,程序中还实现了"托盘"功能,由于这一部分本书在实例中已经专门介绍过了,所以不再赘述,读者朋友可以参考相关实例。 Ot6aRk  
pv Gf\pu  
  最后需要提醒读者朋友们注意的是,源程序的编译与使用时要先编译hook.dll并将其放在系统目录(win2000/NT是system32,98/ME是system),然后编译对话框程序运行即可。 +y3%3EKs1~  
aN8|J?JH  
  二、编程步骤 DuHu\>f<S  
%YC_Se7  
  1、 启动Visual C++,生成一个DLL项目和一个基于对话框的应用程序项目,并将两个项目分别命名为"Hook"和"Capture"; 1BpiV-]=  
hj.a&%  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; b KN@j'M  
<yH4HY  
  3、 在"Capture"项目中按照图一所示设置对话框的界面,具体设置参见代码部分; J.xPv)1'  
*=I}Qh(1  
  4、 使用Class Wizard在"Capture"项目中添加按钮的鼠标单击消息响应函数,并重载对话框的WindowProc()函数; %*0^0wz  
U5.LDv;  
  5、 添加代码,编译运行程序。 /q`xCS  
0p}D(m2B  
三、程序代码 2 Cv4=S  
YLzx<~E4a  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL 2-Ej4I~  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) VYk!k3qS  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ jGpN,/VQa  
#if _MSC_VER > 1000 Tw;3_Lj  
#pragma once ([m mPyp>L  
#endif // _MSC_VER > 1000 Lja>8m  
#ifndef __AFXWIN_H__ yooX$  
#error include 'stdafx.h' before including this file for PCH ;CPr]avY  
#endif [J4gH^Z_  
#include "resource.h" // main symbols io-![^{  
class CHookApp : public CWinApp LH8 fBhw  
{ "Pu!dJ5[]  
 public: V#S9H!hm$  
  CHookApp(); \(^nSy&N  
  // Overrides 5a|w+HO,  
  // ClassWizard generated virtual function overrides z;|A(*Y  
  //{{AFX_VIRTUAL(CHookApp) `</ff+Q6  
 public: <#u=[_H  
  virtual BOOL InitInstance(); n T{3o;A  
  virtual int ExitInstance(); U$WxHYo  
  //}}AFX_VIRTUAL K|hjEQRv  
  //{{AFX_MSG(CHookApp) F|e1"PkeoA  
  // NOTE - the ClassWizard will add and remove member functions here. #\ X#w<\?  
  // DO NOT EDIT what you see in these blocks of generated code ! 65 #'\+  
  //}}AFX_MSG 1]@}|  
  DECLARE_MESSAGE_MAP() noml8o  
}; \1fN0e  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); hM6PP7XH  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); @ W[f1  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); ,>0*@2  
BOOL InitHotkey(); eQp4|rf  
BOOL UnInit(); KmA;HiH%J  
#endif $+Z)  
"2)H'<  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. ]dGw2y  
#include "stdafx.h" lTV'J?8!-a  
#include "hook.h" CkoL TY  
#include <windowsx.h> 2Q/4bJpd  
#ifdef _DEBUG mUdOX7$c>  
#define new DEBUG_NEW 0"\H^  
#undef THIS_FILE @M_oH:GV  
static char THIS_FILE[] = __FILE__; hPUYyjXPB  
#endif "NXB$a!:  
#define MAX_KEY 100 IDB+%xl#S  
#define CTRLBIT 0x04 2ZG5<"DQ"  
#define ALTBIT 0x02 [f1 (`<  
#define SHIFTBIT 0x01 oPXkYW  
#pragma data_seg("shareddata") o:3dfO%nuM  
HHOOK hHook =NULL; iB%gPoDCL@  
UINT nHookCount =0; w~"KA6^  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey Kgi<UkFP  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT X[&Wkr8x '  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey P(,p'I;j  
static int KeyCount =0; DVB{2~7 4  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift ['B?i1 .  
#pragma data_seg() &:dH,  
HINSTANCE hins; Q;43[1&3w  
void VerifyWindow(); gy 3i+J  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp)  a1t4Dd  
//{{AFX_MSG_MAP(CHookApp) P3)Nl^/  
// NOTE - the ClassWizard will add and remove mapping macros here. X\@C.H2ttY  
// DO NOT EDIT what you see in these blocks of generated code! -bT)]gA2  
//}}AFX_MSG_MAP %yW3VL  
END_MESSAGE_MAP() D(AXk8Vub  
C/vI EYG4  
CHookApp::CHookApp() i+S) K  
{ ?fUlgQ }N  
 // TODO: add construction code here, Jrti cK$  
 // Place all significant initialization in InitInstance r^3acXl  
} -EkWs/'h  
G MX?  
CHookApp theApp; $c:ynjL|P-  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) )4<__|52"1  
{ W&& ;:Fr  
 BOOL bProcessed=FALSE; $Q96,rb}k;  
 if(HC_ACTION==nCode) t<z`N-5*  
 { c#Sa]n  
  if((lParam&0xc0000000)==0xc0000000){// Key up r&R B9S@*h  
   switch(wParam) El[)?+;D  
   { cDFO;Dr  
    case VK_MENU: %)|9E>fP]N  
     MaskBits&=~ALTBIT; 52 fA/sx  
     break; ES.fOdx  
    case VK_CONTROL: ZniB]k1  
     MaskBits&=~CTRLBIT; h]5C|M|  
     break; GqaDL3Niqs  
    case VK_SHIFT: 7=TF.TW)  
     MaskBits&=~SHIFTBIT; |)b6>.^  
     break; H%UL%l$  
    default: //judge the key and send message f]`#J%P  
     break; mpI5J'>]  
   } q)S^P>  
   for(int index=0;index<MAX_KEY;index++){ *W0y: 3dB3  
    if(hCallWnd[index]==NULL) kI 4MiK  
     continue; jkiFLtB@V  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) bx{$Y_L+p  
    { w)kNkD  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); dZ  rAn  
     bProcessed=TRUE; tD(7^GuR  
    } +cgSC5nR  
   } RrX[|GLSJ  
  } h|VeG3H  
  else if((lParam&0xc000ffff)==1){ //Key down <lw` 3aa(  
   switch(wParam) j9?}j #@  
   { EQb7 -vhg  
    case VK_MENU: 5!DBmAB  
     MaskBits|=ALTBIT; .aAL]-Rj  
     break; u frW\X  
    case VK_CONTROL: n>+mL"hs  
     MaskBits|=CTRLBIT; 7 %Oa;]|  
     break; <>s`\ %  
    case VK_SHIFT: ~$:|VHl  
     MaskBits|=SHIFTBIT; &x[E;P*Fg  
     break;  "HElB9  
    default: //judge the key and send message lef2X1w}!  
     break; 7'Zky2F  
   } KIui(n#/  
   for(int index=0;index<MAX_KEY;index++) - }7e:!.  
   { QDs^Ije  
    if(hCallWnd[index]==NULL) Z:,U]Z(  
     continue; 5p<ItU$pnL  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) !MYSfPdS  
    { hAYTj0GZ  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); T (OW  
     bProcessed=TRUE; Sp@^XmX(S  
    } ,&j hlZ i  
   } a`&f  
  } 96 q_ K84K  
  if(!bProcessed){ 0E,8R{e  
   for(int index=0;index<MAX_KEY;index++){ 0 fF(Z0R,  
    if(hCallWnd[index]==NULL) .y_/Uwu  
     continue; R:e<W/P"  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) hd>aZ"nm1  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); _/uFsYC  
   } PD&\LbuG  
  } u<3HQ.:;  
 } OMWbZ>jB  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); vwjPmOjhS  
} rai3<_W<  
ROg(U8 N  
BOOL InitHotkey() 0fb`08,^  
{ ?u/@PR\D  
 if(hHook!=NULL){ pP*zq"o  
  nHookCount++; C\/xl#e<@  
  return TRUE; o.w\l\  
 } A?CcHw rT  
 else <j&DK2u=i  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); p2n0Z\2  
  if(hHook!=NULL) P_?gq>E8  
   nHookCount++; ';TT4$(m  
  return (hHook!=NULL); b8V~S'6VqO  
} tZ} v%3  
BOOL UnInit() c(:f\Wc3Z  
{ U*( izD  
 if(nHookCount>1){ &u /Nf&A  
  nHookCount--; U]^HjfX\  
  return TRUE; *AoR==:ya  
 } O4r0R1VQM  
 BOOL unhooked = UnhookWindowsHookEx(hHook); SH_(rQby  
 if(unhooked==TRUE){ zm]aU`j  
  nHookCount=0; /tP|b _7O  
  hHook=NULL; BGOuDKz9C  
 } v1BDP<qU2  
 return unhooked; jT8#C=a7  
} wF <n=  
mz @T  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) 3Mxp)uG/  
{ ]Y2RqXA*  
 BOOL bAdded=FALSE; g#F?!i-[F  
 for(int index=0;index<MAX_KEY;index++){ 2"Ecd  
  if(hCallWnd[index]==0){ p[hZ@f(z  
   hCallWnd[index]=hWnd; cxA^:3  
   HotKey[index]=cKey; gZLP\_CL  
   HotKeyMask[index]=cMask; IhA5Wt0j  
   bAdded=TRUE; 12;8o<~  
   KeyCount++; 2_n7=&  
   break; lz YEx  
  } :YXX8|>  
 } AG!w4Ky`  
 return bAdded; Cnbz=z  
} :bz}c48%  
* mOo@+89  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) "}pNe"ok  
{ |$Xl/)Oq  
 BOOL bRemoved=FALSE; y.WEj?EL  
 for(int index=0;index<MAX_KEY;index++){ nQ q=7Gu  
  if(hCallWnd[index]==hWnd){  @2Z#x  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ i\KQ!f>A  
    hCallWnd[index]=NULL; 7NDr1Z#B6V  
    HotKey[index]=0; 3gv|9T  
    HotKeyMask[index]=0; ]z l [H7  
    bRemoved=TRUE; 9cf:pXMi  
    KeyCount--; @!`Xl*l  
    break; &d"G/6  
   } .WPV dwV4U  
  } =R#Qx,  
 } |/09<F:L[  
 return bRemoved; y^%n'h{  
} W#KpPDgZE  
`Jzp Sw  
void VerifyWindow() @&X|5p"[g  
{ -7S g62THS  
 for(int i=0;i<MAX_KEY;i++){ Ezr:1 GJ  
  if(hCallWnd!=NULL){ /lo2y?CS*  
   if(!IsWindow(hCallWnd)){ UD8op]>L  
    hCallWnd=NULL; xZ6~Ma 2z  
    HotKey=0; GH+r ?2<  
    HotKeyMask=0; q OSM}ei>s  
    KeyCount--; .v$D13L(o  
   } N'g>MBdI  
  } c2&q*]?l;  
 } <)u`~$n2  
} 5qr'.m  
b]x4o#t  
BOOL CHookApp::InitInstance() W0l,cOOZJ  
{ WN01h=1J_  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); @&1ZB6OCb:  
 hins=AfxGetInstanceHandle(); "br,/Dk>MX  
 InitHotkey(); pL{U `5S  
 return CWinApp::InitInstance(); |962G1.  
} ]`kmjn  
!Cr(P e]  
int CHookApp::ExitInstance() $4/yZaVb  
{ MhR:c7,  
 VerifyWindow(); *.!Np9l,V  
 UnInit(); Fxm$9(Y  
 return CWinApp::ExitInstance(); 1UE6 4Kl:S  
} dYL"h.x  
(+B5|_xQu  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file =>M^02"  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) r7b1-  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ 5*1D$mxD"  
#if _MSC_VER > 1000 C}_ ojcR  
#pragma once hRs&t,{&  
#endif // _MSC_VER > 1000  CCL   
m^b Nuo  
class CCaptureDlg : public CDialog VzY8rI  
{ K?BOvDW"`  
 // Construction B]uc<`f  
 public: CE/Xfh'44  
  BOOL bTray; mT.u0KUIy  
  BOOL bRegistered; 9D7+[`r(-  
  BOOL RegisterHotkey(); i'#E )  
  UCHAR cKey; xO&eRy?%  
  UCHAR cMask; 8$0rR55  
  void DeleteIcon(); \3pc"^W  
  void AddIcon(); H[S%J3JI  
  UINT nCount; qYlhlHD  
  void SaveBmp(); T~Gvp0r}h  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor U-R6xxPZ  
  // Dialog Data `QyO`y=?[Y  
  //{{AFX_DATA(CCaptureDlg) {&\jW!&n  
  enum { IDD = IDD_CAPTURE_DIALOG }; =5kY6%E7c  
  CComboBox m_Key; Mz~M3$$9n  
  BOOL m_bControl; OoA|8!CFa  
  BOOL m_bAlt; aFS,GiB  
  BOOL m_bShift; Q$="_y2cTA  
  CString m_Path; fSs4ZXC  
  CString m_Number; yF"1#{*y  
  //}}AFX_DATA =y0C1LD+  
  // ClassWizard generated virtual function overrides B2C$N0R#  
  //{{AFX_VIRTUAL(CCaptureDlg) JV]^zW  
 public: OH">b6>\  
  virtual BOOL PreTranslateMessage(MSG* pMsg); ?XA2&  
 protected: Z yE `/J'  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support DV<` K$ET  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); cd$m25CxC  
  //}}AFX_VIRTUAL a{ ?`t|  
  // Implementation {TX]\ufG  
 protected: z7Q?D^miy  
  HICON m_hIcon; NhaI<J  
  // Generated message map functions NiU2@zgl  
  //{{AFX_MSG(CCaptureDlg) ]%?YZn<{  
  virtual BOOL OnInitDialog(); G>1eFBh }  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); F W/W%^  
  afx_msg void OnPaint(); STxKE %l  
  afx_msg HCURSOR OnQueryDragIcon(); 9J9)AV  
  virtual void OnCancel(); fjs [f'L  
  afx_msg void OnAbout(); f"qga/  
  afx_msg void OnBrowse(); 6WU(%  
  afx_msg void OnChange(); SVO3821  
 //}}AFX_MSG 8]M_z:F7F  
 DECLARE_MESSAGE_MAP() "a8j"lPJ  
}; dIRm q+d^  
#endif  B[Zjfc  
5[* qi?w=  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file C4~;yhz  
#include "stdafx.h" &?*V0luP)  
#include "Capture.h" %jJ>x3$F  
#include "CaptureDlg.h" 9hOJvQ2U]  
#include <windowsx.h> %we u 1f  
#pragma comment(lib,"hook.lib") J|w\@inQ  
#ifdef _DEBUG V>A .iim  
#define new DEBUG_NEW -Xxqm%([71  
#undef THIS_FILE pXJpK@z  
static char THIS_FILE[] = __FILE__; W!?7D0q  
#endif bpKZ3}U  
#define IDM_SHELL WM_USER+1 L"{JRbh[  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); ;)!Sp:mHX  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); ]8 f ms(  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; +(C6#R<LI  
class CAboutDlg : public CDialog B, TB3 {  
{ WXmn1^"kK}  
 public: vfq%H(  
  CAboutDlg(); HA2k [F@3^  
  // Dialog Data , ]+z)   
  //{{AFX_DATA(CAboutDlg) \hM|(*DL  
  enum { IDD = IDD_ABOUTBOX }; Bc6|n :;u  
  //}}AFX_DATA }RwSp!}C  
  // ClassWizard generated virtual function overrides S%yd5<%_  
  //{{AFX_VIRTUAL(CAboutDlg) DRc)iE>@  
 protected: ; =X P&  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support yjhf   
  //}}AFX_VIRTUAL :&:JTa1cv  
  // Implementation TW[_Ko86  
 protected: ?)`L$Vr=  
  //{{AFX_MSG(CAboutDlg) 5lm<%  
  //}}AFX_MSG d"6&AJ5a  
  DECLARE_MESSAGE_MAP() ,:Lb7bFv>  
}; [L:o`j  
|=$-Wu  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) +eX@U;J,g  
{ qeL5D*  
 //{{AFX_DATA_INIT(CAboutDlg) V\^EfQ  
 //}}AFX_DATA_INIT .R9IL-3fO  
} [BT/~6ovrZ  
Qt/8r*Oe  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) Z| V`B `  
{ 3 AsT  
 CDialog::DoDataExchange(pDX); z&{5;A}Q@  
 //{{AFX_DATA_MAP(CAboutDlg) rxy&spX  
 //}}AFX_DATA_MAP U5He?  
} Q)LM-ZJKQ  
hED=u/ql[  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) 2EfF=Fm>  
 //{{AFX_MSG_MAP(CAboutDlg) S6AU[ASY.  
 // No message handlers `~ * @q!  
 //}}AFX_MSG_MAP R0L&*Bjm  
END_MESSAGE_MAP() av$/Om :  
h3Q21D'f  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) [&nh5 |f  
: CDialog(CCaptureDlg::IDD, pParent) DBCK2PlJ  
{ S p^9& ^  
 //{{AFX_DATA_INIT(CCaptureDlg) "V$Bnz\n  
  m_bControl = FALSE; w*|7!iM  
  m_bAlt = FALSE; {WPobP"  
  m_bShift = FALSE; Qbyv{/   
  m_Path = _T("c:\\"); R8T] 2?Q1  
  m_Number = _T("0 picture captured."); '*k'i;2/1  
  nCount=0; tWoh''@#  
  bRegistered=FALSE; GF5^\Rf  
  bTray=FALSE; E5N{j4\F  
 //}}AFX_DATA_INIT ea~:}!-P  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 $.GOZqMs  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); <]b7ZF]  
} a)#1{JaoY  
k}0^&Quc4  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) R hvfC5Hq  
{ "B8"_D&  
 CDialog::DoDataExchange(pDX); Ns[ym>x#2  
 //{{AFX_DATA_MAP(CCaptureDlg) DNj "SF(J  
  DDX_Control(pDX, IDC_KEY, m_Key); WN_pd%m  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); TW9WMId  
  DDX_Check(pDX, IDC_ALT, m_bAlt); 'I /aboDB  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); stk9Ah  
  DDX_Text(pDX, IDC_PATH, m_Path); y;AL'vm9  
  DDX_Text(pDX, IDC_NUMBER, m_Number); H03jDM8Q  
 //}}AFX_DATA_MAP &ZX{R#[L  
} %B)6$!x  
=n' 4?W@  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) ^-[?#]  
//{{AFX_MSG_MAP(CCaptureDlg) gW1b~( fD  
 ON_WM_SYSCOMMAND() <1.A=_ M  
 ON_WM_PAINT() lME)?LOI  
 ON_WM_QUERYDRAGICON() /M*a,o  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) zdEPDd B  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) }LijnHH.  
 ON_BN_CLICKED(ID_CHANGE, OnChange) LI6hE cM=  
//}}AFX_MSG_MAP Wf&W^Q  
END_MESSAGE_MAP() BZXUwqEh  
`QUy;%+  
BOOL CCaptureDlg::OnInitDialog() 4)<~4 '  
{ (Gw,2 -A  
 CDialog::OnInitDialog(); }Iz7l{al   
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); _+^ 2^TW  
 ASSERT(IDM_ABOUTBOX < 0xF000); S9>0t0  
 CMenu* pSysMenu = GetSystemMenu(FALSE); acw4B5]  
 if (pSysMenu != NULL) 3,Q^& 1  
 { #zR bx  
  CString strAboutMenu; ?x0pe4^If  
  strAboutMenu.LoadString(IDS_ABOUTBOX); q=DN {a:  
  if (!strAboutMenu.IsEmpty()) h'$ 9C  
  { &09U@uc$  
   pSysMenu->AppendMenu(MF_SEPARATOR); lZrVY+ D  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); n9\]S7] 52  
  } ]wWPXx[>/  
 } WwUv5GZTW  
 SetIcon(m_hIcon, TRUE); // Set big icon C{q:_M;  
 SetIcon(m_hIcon, FALSE); // Set small icon v,\R, {0  
 m_Key.SetCurSel(0); + \{&2a?  
 RegisterHotkey(); 1& '8Y  
 CMenu* pMenu=GetSystemMenu(FALSE); WMBm6?54  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); `r_m+]  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); ( &frUQm  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND);  =Mb1o[  
 return TRUE; // return TRUE unless you set the focus to a control (}5S  
} h#hxOVl%x  
5 XA=G  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) I6s3+x;O  
{ | /|  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) `WOYoec   
 { yj$TPe_BW  
  CAboutDlg dlgAbout; ,.o<no  
  dlgAbout.DoModal(); U7DCx=B  
 } DtEwW1J  
 else $L2%u8}8:  
 { wV)}a5+  
  CDialog::OnSysCommand(nID, lParam); o8Z[+;  
 } !!:LJ  
} wHem5E  
_"%B7FK  
void CCaptureDlg::OnPaint() zA;@@)hwR  
{ XZ/[v8  
 if (IsIconic()) N|Sf=q?Ko  
 { <soz#}e  
  CPaintDC dc(this); // device context for painting S i nl  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); ~WpGf,  
  // Center icon in client rectangle n3`&zY  
  int cxIcon = GetSystemMetrics(SM_CXICON); SgEBh  
  int cyIcon = GetSystemMetrics(SM_CYICON); tL+OCLF;  
  CRect rect; :~ A%#  
  GetClientRect(&rect); z 8*8OWM  
  int x = (rect.Width() - cxIcon + 1) / 2; KnNh9^4"\2  
  int y = (rect.Height() - cyIcon + 1) / 2; }rdIUlVO\  
  // Draw the icon 4A3nO<o MF  
  dc.DrawIcon(x, y, m_hIcon); }I!hOD>]O  
 }  P N*JR  
 else olW|$?  
 { 6ITLGA  
  CDialog::OnPaint(); *E~VKx1  
 } 5eA8niq#  
} u<n`x6gL  
:EtMH(  
HCURSOR CCaptureDlg::OnQueryDragIcon() +]@Az.E  
{ lI/0:|l  
 return (HCURSOR) m_hIcon; 7DfTfTU6  
} "W#t;;9Wz  
pfd#N[c  
void CCaptureDlg::OnCancel() }N*>QR5K  
{ L@^~N$G&u  
 if(bTray) =ORf%f5"'  
  DeleteIcon(); "|m|E/Z-9  
  CDialog::OnCancel(); ZCg`z  
} $oLU; q%  
pU!o7>p  
void CCaptureDlg::OnAbout() IAOcKQ3  
{  pAu72O?  
 CAboutDlg dlg; vLO&Lpv  
 dlg.DoModal(); ?v-1zCls  
} e0;  
GyC/_ntn  
void CCaptureDlg::OnBrowse() pX=,iOF[I  
{ Y?#i{ixX6n  
 CString str; [ "xn5l E  
 BROWSEINFO bi; <fdPLw;@e4  
 char name[MAX_PATH]; {$M;H+Foh  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); )n=ARDd^e  
 bi.hwndOwner=GetSafeHwnd(); ?_`0G/xl  
 bi.pszDisplayName=name; LjdYsai-  
 bi.lpszTitle="Select folder"; kHJ96G  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; M"_FrIO  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); jFerYv&K~  
 if(idl==NULL) PVa o  
  return; F8+e,x  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); s^T+5 E&}  
 str.ReleaseBuffer(); somfv$'B  
 m_Path=str; )uLr?$qe  
 if(str.GetAt(str.GetLength()-1)!='\\') 9B +wYJp  
  m_Path+="\\"; +/?iCmW  
 UpdateData(FALSE); s~},y]YV  
} oY`qInM_  
CT d|`  
void CCaptureDlg::SaveBmp() jLcHY-P0V  
{ Vdn.)ir~P  
 CDC dc; 9zgNjjCl]  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); Z v0C@r  
 CBitmap bm; h<+ |x7u  
 int Width=GetSystemMetrics(SM_CXSCREEN); cywg[  
 int Height=GetSystemMetrics(SM_CYSCREEN); Q&M'=+T  
 bm.CreateCompatibleBitmap(&dc,Width,Height); /9Ilo\MdD  
 CDC tdc; J`#` fX  
 tdc.CreateCompatibleDC(&dc); 4B?!THjk  
 CBitmap*pOld=tdc.SelectObject(&bm); #\bP7a +  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); XtBMp=7Oa  
 tdc.SelectObject(pOld); y7<&vIEC  
 BITMAP btm; Napf"Av  
 bm.GetBitmap(&btm); 2@vj!U8  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; W>spz~w%j  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); eFTX6XB:i  
 BITMAPINFOHEADER bih; 6(sIYZ2yq  
 bih.biBitCount=btm.bmBitsPixel; S2~@nhO`U(  
 bih.biClrImportant=0; THhy~wC".  
 bih.biClrUsed=0; P ,K\  
 bih.biCompression=0; H:a|x#"  
 bih.biHeight=btm.bmHeight; J  fcMca  
 bih.biPlanes=1; T`$KeuL  
 bih.biSize=sizeof(BITMAPINFOHEADER); v\ZBv zd  
 bih.biSizeImage=size; p-GT`D  
 bih.biWidth=btm.bmWidth; r dj@u47  
 bih.biXPelsPerMeter=0; %B EC] h  
 bih.biYPelsPerMeter=0; 9e<Zgr?N  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); ][Y^-Ak1  
 static int filecount=0; SvK1.NUa  
 CString name; )Mzt3u  
 name.Format("pict%04d.bmp",filecount++);  d^39t4  
 name=m_Path+name;  r@T| e  
 BITMAPFILEHEADER bfh; EaS~`  
 bfh.bfReserved1=bfh.bfReserved2=0; S=gW(c2'  
 bfh.bfType=((WORD)('M'<< 8)|'B'); 2w?G.pO#  
 bfh.bfSize=54+size; dm R3Y.\jd  
 bfh.bfOffBits=54; ] mj v;C  
 CFile bf; )u@t.)ChAV  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ b"8FlZ$  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); 8U.$FMx :  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); za,2r^  
  bf.WriteHuge(lpData,size); Nm8w/Q5D`  
  bf.Close(); 0^]t"z5f0  
  nCount++; w1B<0'#  
 } FsCwF&/q  
 GlobalFreePtr(lpData); 'o\;x"YJ  
 if(nCount==1) QJ];L7Hbo  
  m_Number.Format("%d picture captured.",nCount); # bX~=`  
 else Jm![W8L  
  m_Number.Format("%d pictures captured.",nCount); gw Qvao  
  UpdateData(FALSE); ma}}Sn)Q  
} 6b:DJ  
~HP LV  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) eX<K5K.B  
{ wsg//Ec]  
 if(pMsg -> message == WM_KEYDOWN) FU@uH U5fd  
 { Wp*sP Z  
  if(pMsg -> wParam == VK_ESCAPE) ) YSh D  
   return TRUE; GhnE>d;i  
  if(pMsg -> wParam == VK_RETURN) $P?{O3:V  
   return TRUE; - 8syjKTg  
 } <q7s`,rG  
 return CDialog::PreTranslateMessage(pMsg); \7E`QY4  
} 9YSVK\2$  
;]h.m)~|  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) ,L-C(j  
{ 3.)_uo0;o  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ WbzA Jx 5  
  SaveBmp(); `I> ], J/  
  return FALSE; U5 rxt^  
} 0]a15  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ WzG07 2w  
 CMenu pop; *4#on>  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); [&n|\!  
 CMenu*pMenu=pop.GetSubMenu(0); ;4d.)-<No_  
 pMenu->SetDefaultItem(ID_EXITICON); P $h;SK  
 CPoint pt; yv${M u  
 GetCursorPos(&pt); z\[(g  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); `2x34  
 if(id==ID_EXITICON) h Z#\t  
  DeleteIcon(); -]&<Sr-  
 else if(id==ID_EXIT) fjkT5LNx k  
  OnCancel(); psD[j W  
 return FALSE; szn%wZW  
} r"]Oe$[#  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); z1vni'%J  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) 4 ? {*(  
 AddIcon(); -~'kP /E^  
 return res; a97Csxf;7  
} ^@ UjQ9[>  
pSrsp r  
void CCaptureDlg::AddIcon() h]C2 8=N  
{ 7Jc<.Z"/Gd  
 NOTIFYICONDATA data; W}k[slqZA  
 data.cbSize=sizeof(NOTIFYICONDATA); ~\bHfiIDy  
 CString tip; Fhi5LhWe+.  
 tip.LoadString(IDS_ICONTIP); ` Y\QUj  
 data.hIcon=GetIcon(0); 1OPfRDn.bk  
 data.hWnd=GetSafeHwnd(); N K"%DU<  
 strcpy(data.szTip,tip); [Ye5Y?  
 data.uCallbackMessage=IDM_SHELL; ~D!ESe*=  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; 8Xk Ik7  
 data.uID=98; Qy%xL9  
 Shell_NotifyIcon(NIM_ADD,&data); *08+\ed"#  
 ShowWindow(SW_HIDE); _&mc8ftT  
 bTray=TRUE; ! ZA}b[  
} t!savp  
8AX3C s_G  
void CCaptureDlg::DeleteIcon() g!5#,kJM  
{ o?=fhc  
 NOTIFYICONDATA data; RD9Y k  
 data.cbSize=sizeof(NOTIFYICONDATA); ]84YvpfW  
 data.hWnd=GetSafeHwnd(); jhcuK:`L  
 data.uID=98; h~.V[o7=  
 Shell_NotifyIcon(NIM_DELETE,&data); #[(0tc/  
 ShowWindow(SW_SHOW); #J3zTG(:@  
 SetForegroundWindow(); Ris-tdg  
 ShowWindow(SW_SHOWNORMAL); eb7UoZw  
 bTray=FALSE; Ds G !S*  
} Vdy\4 nu(  
|Qq+8IeYG  
void CCaptureDlg::OnChange() ]Qy,#p'~&H  
{ a5I%RY  
 RegisterHotkey(); kpY%&  
} DUPmq!A  
`~KAk  
BOOL CCaptureDlg::RegisterHotkey() wJr/FE 7c  
{ 2?pM5n  
 UpdateData(); R''Sfz>8  
 UCHAR mask=0; ;>'SV~F  
 UCHAR key=0; (aBP|rxg  
 if(m_bControl) mlmnkgl ]  
  mask|=4; X{|k<^:  
 if(m_bAlt) SFOQM*H  
  mask|=2; 'U*udkn 2]  
 if(m_bShift) ?xf~!D  
  mask|=1; aH9L|BN*  
  key=Key_Table[m_Key.GetCurSel()]; l85CJ+rg  
 if(bRegistered){ 2PI #ie4  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); b__n~\q_  
  bRegistered=FALSE; PKATw>zg<  
 } ~EPjZ3 ?  
 cMask=mask; s!=!A  
 cKey=key; }K+\8em  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); ~JT lPU'  
 return bRegistered; > d)|r  
} _qk9o  
rcpvH}N:  
  四、小结 /. f!  
?~]>H 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
如果您在写长篇帖子又不马上发表,建议存为草稿
认证码:
验证问题:
10+5=?,请输入中文答案:十五