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
  • 5041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: ZA_~o#0%  
  b!SIs*  
  一、实现方法 "/^kFsvp  
s#0m  
  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: 4u|6^ wu.I  
>4>. Ycp  
#pragma data_seg("shareddata") -"^"& )  
HHOOK hHook =NULL; //钩子句柄 <;+QK=f  
UINT nHookCount =0; //挂接的程序数目 Lrx"Hn{  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 Tnf&32 IA  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 \sVzBHy d  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey EG=U](8T  
static int KeyCount =0; },5LrX`L  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 -jTK3&5  
#pragma data_seg() _fj@40i M  
RC"xnnIJv  
  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。 xU.Ymq& 5  
*0a7H$iQ(]  
  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: S +73 /Vs  
bw#\"uJ  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR s5d[sx  
cKey,UCHAR cMask) tUfze9m  
{ odcrP\S  
 BOOL bAdded=FALSE; jP3~O  
 for(int index=0;index<MAX_KEY;index++){ n n8N 9w  
  if(hCallWnd[index]==0){ L<<v   
   hCallWnd[index]=hWnd; N9Fu  
   HotKey[index]=cKey; HwMe^e;  
   HotKeyMask[index]=cMask; |])Ko08*tE  
   bAdded=TRUE; 7V\M)r{q7  
   KeyCount++; r_a1oO:  
   break; \gZjq]3  
  } $U_1e'  
 } H:1F=$0I9  
 return bAdded; _{i- .;K  
} l`K5fk  
//删除热键 1-4*YrA  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) {\!@ k\__  
{ .|kp`-F51  
 BOOL bRemoved=FALSE; C\[g>_J  
 for(int index=0;index<MAX_KEY;index++){ i6h0_q8 >  
  if(hCallWnd[index]==hWnd){ zpxy X|  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ ]7dal [i  
    hCallWnd[index]=NULL; oP<E)  
    HotKey[index]=0; 0ipYXbC  
    HotKeyMask[index]=0; <J1$s_^`  
    bRemoved=TRUE; dNs<`2m  
    KeyCount--; >\!>CuU  
    break; kmL~H1qd  
   } 1T7;=<g`  
  } PmE2T\{s!  
 } ?K?v64[  
 return bRemoved; h|=&a0  
} h<2O+"^  
? #;zB  
Ed~2Qr\65  
  DLL中的钩子函数如下: <wt9K2,  
.hXdXY  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) >*mLbp"  
{ BcTV5Wcr  
 BOOL bProcessed=FALSE; K_~SJbl  
 if(HC_ACTION==nCode) 1G+ ?/w  
 { AfW9;{j&I  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 cS1BB#N0  
   switch(wParam) n\y%5J+  
   {  Z)zmT%t  
    case VK_MENU: {utIaMb]&v  
     MaskBits&=~ALTBIT; M%2 F7 FY  
     break; (Sg52zv  
    case VK_CONTROL: "&/&v  
     MaskBits&=~CTRLBIT; !Q5ip'L  
     break; ztS'Dp}q<  
    case VK_SHIFT: N^. !l_  
     MaskBits&=~SHIFTBIT; L$+ap~ld  
     break; BqKh&m  
    default: //judge the key and send message f&ym'S  
     break;  HRKe 7#e  
   } B/CP/Pfb  
   for(int index=0;index<MAX_KEY;index++){ ^*]0quu=z  
    if(hCallWnd[index]==NULL) obE_`u l#  
     continue; )xQA+$H#4  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) 1vQj` F  
    { Q pY:L  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); lLT;V2=osX  
     bProcessed=TRUE; U:`g12  
    } ^kMgjS}R  
   } jibrSz  
  } vxo iPqo  
  else if((lParam&0xc000ffff)==1){ //有键按下 +'x`rk  
   switch(wParam) M+ gYKPP  
   { Hdh'!|w  
    case VK_MENU: s!2pOH!u   
     MaskBits|=ALTBIT; zKWcDbj  
     break; s Hu~;)  
    case VK_CONTROL: #$Z|)i]w  
     MaskBits|=CTRLBIT; >w?O?&Q$  
     break; rK2*DuE  
    case VK_SHIFT: s]r"-^eS3  
     MaskBits|=SHIFTBIT; _Ucj)Ud k  
     break; INrUvD/*  
    default: //judge the key and send message U&/Jh^Yy  
     break; lV^sVN Z]  
   } xU^Flw,4  
   for(int index=0;index<MAX_KEY;index++){ /9WR>NUAO  
    if(hCallWnd[index]==NULL) h2u> CXD  
     continue; - iS\3P.  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) +aV>$Y  
    { E q.?Ga  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); ewk62 {  
     bProcessed=TRUE; >"S'R9t  
    } 2ZB'WzH.X  
   } y^:g"|q  
  } Ne.W-,X^cL  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 ^;$f-e  
   for(int index=0;index<MAX_KEY;index++){ @B~/0 9  
    if(hCallWnd[index]==NULL) ]`y4n=L.  
     continue; OlFls 8#>  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) Hi9;i/  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); ~y^#?;  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 O.1Z3~r-N  
   } )D@1V=9,  
  } M>0=A  
 } *#frbV?;  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); 2[Q*?N  
} /U6G?3b  
j 46f Q  
  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: lbgnO s,  
yGH'|`  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); }jfU qqFd  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); L;5j hVy  
<0R7uH  
  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: iH( K[F /  
qw0tw2|  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) +:~&"U^ z&  
{ `t:7&$>T  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) 91%+Bf()J6  
 { 7|T5N[3?l,  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 Nj.(iBmr  
  SaveBmp(); brNe13d3~"  
  return FALSE; 0d:t$2~C  
 } bu%@1:l  
 …… //其它处理及默认处理 RV^2[Gdi  
} Q{H88g^=J  
#'^p-Jdm  
HHCsWe-  
  将屏幕图像保存到BMP文件中的任务是由函数SaveBmp()来完成的,具体实现参见代码部分。另外为了顺利实现屏幕抓图,程序中还实现了"托盘"功能,由于这一部分本书在实例中已经专门介绍过了,所以不再赘述,读者朋友可以参考相关实例。 )dJM  
 -deY,%  
  最后需要提醒读者朋友们注意的是,源程序的编译与使用时要先编译hook.dll并将其放在系统目录(win2000/NT是system32,98/ME是system),然后编译对话框程序运行即可。 _w^p~To^  
*2 4P T7  
  二、编程步骤 CTR|b}!  
Gc4N)oq)}b  
  1、 启动Visual C++,生成一个DLL项目和一个基于对话框的应用程序项目,并将两个项目分别命名为"Hook"和"Capture"; @+ Berb  
Otn,(j;u  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; &EXql']  
E[nWB"pxE  
  3、 在"Capture"项目中按照图一所示设置对话框的界面,具体设置参见代码部分; =9YyUAJZ  
lV`y6{o#T  
  4、 使用Class Wizard在"Capture"项目中添加按钮的鼠标单击消息响应函数,并重载对话框的WindowProc()函数; !o:RIwS3  
}^?dK3~q  
  5、 添加代码,编译运行程序。 68Wm=j.m  
6H VS0  
三、程序代码 W8yr06{]  
2[9hl@=%  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL Trbgg  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) =d7lrx+z  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ zBB4lC{q  
#if _MSC_VER > 1000 "KW\:uc /  
#pragma once &>@nW!n u  
#endif // _MSC_VER > 1000 /%Rz`}  
#ifndef __AFXWIN_H__ g*- K!X6l  
#error include 'stdafx.h' before including this file for PCH i<bFF03*S  
#endif mmTc.x h  
#include "resource.h" // main symbols f&8&UL>e`  
class CHookApp : public CWinApp 5p94b*l  
{ i layU  
 public: _9#4  
  CHookApp(); (LTm!"Q  
  // Overrides U&wVe$  
  // ClassWizard generated virtual function overrides %=S^{A  
  //{{AFX_VIRTUAL(CHookApp) ;r^8In@6  
 public: = Yh>5A  
  virtual BOOL InitInstance(); ^z9ITGB~tV  
  virtual int ExitInstance(); l0tMdsz  
  //}}AFX_VIRTUAL h k(2,z  
  //{{AFX_MSG(CHookApp) 3UD_2[aqN(  
  // NOTE - the ClassWizard will add and remove member functions here. f Nm Sx  
  // DO NOT EDIT what you see in these blocks of generated code ! sUfH1w)0  
  //}}AFX_MSG !7AW_l9`i  
  DECLARE_MESSAGE_MAP() <|hvH  
}; O#Xq0o  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); b,KQG|k  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); 1reJ7b0  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); f*1.Vg0`-  
BOOL InitHotkey(); 2ztP'  
BOOL UnInit(); bzk@6jR1  
#endif 1xL2f&bG  
RQ9fA1YP  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. JT[|l-\zo  
#include "stdafx.h" '<>pz<c  
#include "hook.h" _s|C0Pt  
#include <windowsx.h> ~hE"B) e  
#ifdef _DEBUG V_Wv(G0-\  
#define new DEBUG_NEW -AD3Pd|Y[  
#undef THIS_FILE ;8|uY%ab  
static char THIS_FILE[] = __FILE__; =6ZZ/+6b  
#endif Ct|iZLh`j  
#define MAX_KEY 100 # T$^{/J  
#define CTRLBIT 0x04 Ls5|4%+&  
#define ALTBIT 0x02 3PpycJ}  
#define SHIFTBIT 0x01 -zN*2T  
#pragma data_seg("shareddata") QI=",vma u  
HHOOK hHook =NULL; SD8Q_[rY  
UINT nHookCount =0; _9Iz'-LgB  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey 6n  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT A$;U*7TJuO  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey E2LpQNvN%g  
static int KeyCount =0; k~`pV/6  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift .N5}JUj  
#pragma data_seg() r*&gd|sn  
HINSTANCE hins; l yF~E  
void VerifyWindow(); #J)sz,)(  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) hG uRV|`  
//{{AFX_MSG_MAP(CHookApp) ~>k<I:BtrT  
// NOTE - the ClassWizard will add and remove mapping macros here. p#qQGJe  
// DO NOT EDIT what you see in these blocks of generated code! ]A5FN4 E  
//}}AFX_MSG_MAP Fv.}w_  
END_MESSAGE_MAP() Z8z.Xn  
vCFMO3  
CHookApp::CHookApp() FU;Tv).  
{  pzg|?U  
 // TODO: add construction code here, % E3  
 // Place all significant initialization in InitInstance *6df|q  
} =Qsh3b&<P  
DJS0;!# |O  
CHookApp theApp; W[AX?  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) -,uTAk0+@  
{ .Quu_S_ vH  
 BOOL bProcessed=FALSE; jdK~]eld=  
 if(HC_ACTION==nCode) {SY@7G]  
 { )U`6` &F  
  if((lParam&0xc0000000)==0xc0000000){// Key up b" 1a7   
   switch(wParam) lr=? &>MXj  
   { V\W?@V9g-  
    case VK_MENU: ?S~HnIn  
     MaskBits&=~ALTBIT; o:.={)rX  
     break; r? nvJHP  
    case VK_CONTROL: IX$dDwY|O>  
     MaskBits&=~CTRLBIT; Y}&//S A  
     break; )^qM%k8  
    case VK_SHIFT: Pv17wUB  
     MaskBits&=~SHIFTBIT; ?T3zA2  
     break; ^ r-F@$:.  
    default: //judge the key and send message }3E@]"<cVR  
     break; Oz'x5/%G  
   } EcxPbRg  
   for(int index=0;index<MAX_KEY;index++){ <1YINkRz  
    if(hCallWnd[index]==NULL) :1^ R$0d  
     continue; $A;jl`ng  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) UOJx-o!c?  
    { B8F.}M-!  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); |L}zB,  
     bProcessed=TRUE; $sTbFY  
    } ~Z9Eb|B  
   } lr'h  
  } V7U&8UPb  
  else if((lParam&0xc000ffff)==1){ //Key down "1FPe63\*O  
   switch(wParam) AyKvh  
   { V7[6jW gH  
    case VK_MENU: E (  
     MaskBits|=ALTBIT; X;lL$  
     break; 9UsA>m.  
    case VK_CONTROL: )_k"_VVcC  
     MaskBits|=CTRLBIT; IppzQ0'=y1  
     break; Ls< ";QJc  
    case VK_SHIFT: @<=xfs  
     MaskBits|=SHIFTBIT; Uy2NZ%rnt  
     break; "(zvI>A  
    default: //judge the key and send message #tg,%*.s  
     break; >Akrbmh5  
   } 9>yLSM,!rS  
   for(int index=0;index<MAX_KEY;index++) M<s16  
   { 4[m})X2(  
    if(hCallWnd[index]==NULL) /j/,@,lw7z  
     continue; AFE6@/'  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) F0:|uC4  
    { $\M<gW6  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); )hs"P%Zg  
     bProcessed=TRUE; ;\ ^'}S|3Z  
    } 4Vl_vTz{i  
   } eG&\b-%  
  } d3-F?i 5d  
  if(!bProcessed){ *`2.WF@E)  
   for(int index=0;index<MAX_KEY;index++){ =lT~  
    if(hCallWnd[index]==NULL) HK&Ul=^VN|  
     continue; .B?6  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) 3 <}\{jT  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); +Ysm6n '  
   } 5pSo`)  
  } W!vN (1:(  
 } Ne<={u%  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); 8XJg  
} ).U\,@[A{  
^j]"!:h  
BOOL InitHotkey() mN^w?R41m  
{ jz,Mm,Gi  
 if(hHook!=NULL){ 7k,pUC-w7c  
  nHookCount++; ,;;7+|`  
  return TRUE; NwAvxN<R(f  
 } jf&B5>-x  
 else e_RLKFv7  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); DrI"YX  
  if(hHook!=NULL) nhV\<  
   nHookCount++; #&zM.O1Q  
  return (hHook!=NULL); Yc~(W ue  
} tfB}U.  
BOOL UnInit() .#^ta9^t7  
{ ?tzJ7PJ~B  
 if(nHookCount>1){ be?>C 5  
  nHookCount--; ],`xd_=]=  
  return TRUE; 7egE."  
 } qt_ocOr  
 BOOL unhooked = UnhookWindowsHookEx(hHook); { 0\Ez}  
 if(unhooked==TRUE){ ] V|hDU=t  
  nHookCount=0; m=Mb'<  
  hHook=NULL; R[_Q}W'HG  
 } 9mE6Cp.Wv  
 return unhooked; =MR.*m{  
} pK`1pfih  
jr/  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) #(@!:f1  
{ z$g cK>@l  
 BOOL bAdded=FALSE; y;Ez|MS   
 for(int index=0;index<MAX_KEY;index++){ @*?)S{8  
  if(hCallWnd[index]==0){ /my5s\;s|z  
   hCallWnd[index]=hWnd; ')R+Z/hG.  
   HotKey[index]=cKey; w8=&rzr8  
   HotKeyMask[index]=cMask; Vn&{yCm3  
   bAdded=TRUE; cp1-eR_&  
   KeyCount++; /80H.|8O  
   break; 8^IV`P~2M  
  } u<L<o 2  
 } Sg%h}]~   
 return bAdded; JJ:pA_uX  
} SjosbdD  
Vz.G!*>Dg  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) _V2^0CZ  
{ Eep~3U  
 BOOL bRemoved=FALSE;  yqH  
 for(int index=0;index<MAX_KEY;index++){ [8C|v61Y  
  if(hCallWnd[index]==hWnd){ vHJOpQmt~  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ IRhi1{K$"  
    hCallWnd[index]=NULL; * 'eE[/K  
    HotKey[index]=0; @%lkRU)  
    HotKeyMask[index]=0; 1JQ5bB"  
    bRemoved=TRUE; WCNycH+1  
    KeyCount--; zA%YaekJ  
    break; mkE_ a>  
   } G2$<Q+UYs?  
  } jz,K>   
 } QhhL_vP  
 return bRemoved; GB%kxtGD;\  
} ,NO2{Ha$  
z`"*60b  
void VerifyWindow() jgvzp  
{ SND@#?hiO  
 for(int i=0;i<MAX_KEY;i++){ @V?T'@W7D  
  if(hCallWnd!=NULL){ Vu`5/QDq  
   if(!IsWindow(hCallWnd)){ 1Clid\T,o  
    hCallWnd=NULL; /^]/ iTg  
    HotKey=0; Ux,?\Vd  
    HotKeyMask=0; sYEh>%mo^C  
    KeyCount--; 8Y]% S9.  
   } qX[{_$^Q  
  } Y/x>wNW  
 } zG0]!A  
} a}e GB +  
gt(^9t;  
BOOL CHookApp::InitInstance() Pz^C3h$5_  
{ b(IZ:ekZ5  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); (himx8Uml2  
 hins=AfxGetInstanceHandle(); <x8I<K  
 InitHotkey(); X-=4Z9  
 return CWinApp::InitInstance(); 3F?7oMNIh  
} 0BwxPD#6bv  
 )[S#:PP  
int CHookApp::ExitInstance() tk)J E^'  
{ ZveNe~D7C  
 VerifyWindow(); `q9n`h1  
 UnInit(); 8J#U=qYei  
 return CWinApp::ExitInstance(); /[=Yv!  
} .@Lktc  
)x,/+R]{8l  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file 2tb+3K1  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) {RGQX"k  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ 7lx" X0w*m  
#if _MSC_VER > 1000 f,|g|&C  
#pragma once z`qb>Y"xf3  
#endif // _MSC_VER > 1000 Gx7bV}&PN  
Kv9$c(~#  
class CCaptureDlg : public CDialog 3PjX;U|  
{ "{S6iH)]8  
 // Construction \#h{bnx  
 public: s TVX/Q  
  BOOL bTray; ^e]O-,UBk  
  BOOL bRegistered; 0HO'%'Ga*  
  BOOL RegisterHotkey(); csd9[=HW/Q  
  UCHAR cKey; eZ oAy[  
  UCHAR cMask; fikDpR  
  void DeleteIcon(); 4]HW!J  
  void AddIcon(); .L9g*q/}  
  UINT nCount; HUAbq }  
  void SaveBmp(); 3(Ns1/;?,  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor )oALB vX  
  // Dialog Data =]r2;014  
  //{{AFX_DATA(CCaptureDlg) =P9Tc"2PN  
  enum { IDD = IDD_CAPTURE_DIALOG }; zs(P2$  
  CComboBox m_Key; o}&{Y2!x  
  BOOL m_bControl; m-qu<4A/U|  
  BOOL m_bAlt; D^QL.Du,  
  BOOL m_bShift; K'}I?H~P_  
  CString m_Path; 2,Aw 6h;  
  CString m_Number; oTRid G  
  //}}AFX_DATA 8(Q|[  
  // ClassWizard generated virtual function overrides cyLl,OA  
  //{{AFX_VIRTUAL(CCaptureDlg) ;PB_ @Zg  
 public: M&jlUr&l  
  virtual BOOL PreTranslateMessage(MSG* pMsg); T, +=ka$  
 protected: Y_}_)nE@m  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support fP[S.7F+No  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); 2FW"uYA;6  
  //}}AFX_VIRTUAL 2z.~K&+x  
  // Implementation k*u6'IKi.4  
 protected: \#PZZH%  
  HICON m_hIcon; YV _ 7 .+A  
  // Generated message map functions &"?99E>  
  //{{AFX_MSG(CCaptureDlg) =it@U/  
  virtual BOOL OnInitDialog(); jXVvVv  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); L|Xg4Z  
  afx_msg void OnPaint(); hH9~.4+*`g  
  afx_msg HCURSOR OnQueryDragIcon(); +J85Re `  
  virtual void OnCancel(); kS35X)-  
  afx_msg void OnAbout(); j 7^A%9  
  afx_msg void OnBrowse(); t-5K dLB  
  afx_msg void OnChange(); Go!{@ xx>  
 //}}AFX_MSG lX-i<0`  
 DECLARE_MESSAGE_MAP() q'/o=De  
}; qDTdYf  
#endif D66NF;7q  
fJP *RVz  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file |VzXcV-"8)  
#include "stdafx.h" JQ;.+5 N<K  
#include "Capture.h" F\hVunPVx  
#include "CaptureDlg.h" 0VrsbkS  
#include <windowsx.h> {n&n^`Em  
#pragma comment(lib,"hook.lib") Z)IF3{*  
#ifdef _DEBUG \4LTViY]  
#define new DEBUG_NEW $hHV Ie]+  
#undef THIS_FILE piH0_7qr  
static char THIS_FILE[] = __FILE__; SuB8mPn  
#endif J2 /19'QE  
#define IDM_SHELL WM_USER+1 eM 5#L,Y{  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); ]=%6n@z'  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); <[D>[  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; S*>T%#F6Uo  
class CAboutDlg : public CDialog +zd/<  
{ ;*t#:U*  
 public: aA52Li  
  CAboutDlg(); D>7J[ Yxg-  
  // Dialog Data J{prI;]K  
  //{{AFX_DATA(CAboutDlg) (YYg-@IO  
  enum { IDD = IDD_ABOUTBOX }; GVJ||0D  
  //}}AFX_DATA ;Su-Y!&%  
  // ClassWizard generated virtual function overrides (DY[OIHI  
  //{{AFX_VIRTUAL(CAboutDlg) Xpn\TD<_I  
 protected: \.O&-oi  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support Wh| T3&  
  //}}AFX_VIRTUAL /z4c>)fV  
  // Implementation Y8]@y0(  
 protected: 2vLun   
  //{{AFX_MSG(CAboutDlg) 72"H#dy%U  
  //}}AFX_MSG r *6S1bW  
  DECLARE_MESSAGE_MAP() (g/A uL  
}; =t)qy5  
eh<mJL%T  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) :&TM0O  
{ aK - x{  
 //{{AFX_DATA_INIT(CAboutDlg) M @-:iP  
 //}}AFX_DATA_INIT 9QLG:(~;  
} d[p2? ]  
<>9!oOa  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) 1u7D:h>#  
{ ?YS>_ MN  
 CDialog::DoDataExchange(pDX); pKy4***I3  
 //{{AFX_DATA_MAP(CAboutDlg) E5)0YYjHZ  
 //}}AFX_DATA_MAP 9l &q}  
} gee~>l  
m<-!~ ew  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) 4jC)"tch  
 //{{AFX_MSG_MAP(CAboutDlg) h2f8-}fsq  
 // No message handlers l7qW)<r  
 //}}AFX_MSG_MAP w/ rQOHV{  
END_MESSAGE_MAP() N;'c4=M~(  
fxPg"R!1i  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) gAdqZJR%]  
: CDialog(CCaptureDlg::IDD, pParent) :M6v<Kg{;  
{ =dDPQZEin  
 //{{AFX_DATA_INIT(CCaptureDlg) `sT;\  
  m_bControl = FALSE; ,P`NtTN-  
  m_bAlt = FALSE; aMhVO(+FW  
  m_bShift = FALSE; k%cE8c}R;A  
  m_Path = _T("c:\\"); q0VAkVHw4  
  m_Number = _T("0 picture captured."); s$hO/INr  
  nCount=0; A8vd@0  
  bRegistered=FALSE; FUI*nkZY  
  bTray=FALSE; b;UDgq8v  
 //}}AFX_DATA_INIT pN5kcvQ  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 HS{Vohy>  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); rx2'].  
} |_TI/i>?'  
px K&aY8  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) "nu]3zcd  
{ sb{K%xi%  
 CDialog::DoDataExchange(pDX); !P=Cv=  
 //{{AFX_DATA_MAP(CCaptureDlg) VZWo.Br'W  
  DDX_Control(pDX, IDC_KEY, m_Key); * &:_Vgu  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); [5?Dov^j 3  
  DDX_Check(pDX, IDC_ALT, m_bAlt); MVzuE}  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); f1ANziC;i  
  DDX_Text(pDX, IDC_PATH, m_Path); 2@6@|jRG  
  DDX_Text(pDX, IDC_NUMBER, m_Number); `_OrBu[  
 //}}AFX_DATA_MAP 8A3/@Z;0S  
} #\lvzMjCC  
F5 ]<=i  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) j9[I6ko5'  
//{{AFX_MSG_MAP(CCaptureDlg) } jJKE  
 ON_WM_SYSCOMMAND() "UMaZgI  
 ON_WM_PAINT() [A84R04_%  
 ON_WM_QUERYDRAGICON() n >y,{"J{  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) 37zB X~  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) /_qq(,3  
 ON_BN_CLICKED(ID_CHANGE, OnChange) 6(`N!]e*L  
//}}AFX_MSG_MAP ,7&\jET5^0  
END_MESSAGE_MAP() vw2E$ya  
T(*,nJi~9  
BOOL CCaptureDlg::OnInitDialog() ~k?rP}>0  
{ ?lsK?>uU  
 CDialog::OnInitDialog(); '37 {$VHw  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); a(A~S u97  
 ASSERT(IDM_ABOUTBOX < 0xF000); H1kI+YJ@  
 CMenu* pSysMenu = GetSystemMenu(FALSE); <@ .e.H  
 if (pSysMenu != NULL) xOe1v9<  
 { 'OtT q8G  
  CString strAboutMenu; c]|vg=W  
  strAboutMenu.LoadString(IDS_ABOUTBOX); J.1 c,@  
  if (!strAboutMenu.IsEmpty()) |"SZpx  
  { larv6ncV  
   pSysMenu->AppendMenu(MF_SEPARATOR); -pYmM d,  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); f1_;da  
  } pKc!sd C  
 } EE  1D>I  
 SetIcon(m_hIcon, TRUE); // Set big icon _h-agn4[i  
 SetIcon(m_hIcon, FALSE); // Set small icon OCx'cSs-=  
 m_Key.SetCurSel(0); TRi#  
 RegisterHotkey(); 6m;>R%S_  
 CMenu* pMenu=GetSystemMenu(FALSE); a20w.6F  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); &}p\&4  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); )4ek!G]Rb  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); r*`e%`HU  
 return TRUE; // return TRUE unless you set the focus to a control 7p.8{zQ*  
} #,#_"  
'r!!W0-K  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) DS(>R!bb  
{ /+92DV  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) q0+N#$g#  
 { mw5>[  
  CAboutDlg dlgAbout; #g6_)B=S  
  dlgAbout.DoModal(); swj\X ,{  
 } HKJCiQ|k  
 else u;t<rEC2  
 { 4~Cf_`X}]  
  CDialog::OnSysCommand(nID, lParam); M$EF 8   
 } R1LirZlzJ  
} @:zC!dR)G  
^ `yhN  
void CCaptureDlg::OnPaint() >k"O3Pc@  
{ d8: $ll  
 if (IsIconic()) AJ/Hw>>$?m  
 { epnZGz,A  
  CPaintDC dc(this); // device context for painting i<Ms2^  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); K7&]| ^M9  
  // Center icon in client rectangle hFA |(l6  
  int cxIcon = GetSystemMetrics(SM_CXICON); \>:t={>;  
  int cyIcon = GetSystemMetrics(SM_CYICON); #eKKH]J/  
  CRect rect; e2=}qE7  
  GetClientRect(&rect); R WY>`.su  
  int x = (rect.Width() - cxIcon + 1) / 2; Q I";[  
  int y = (rect.Height() - cyIcon + 1) / 2; : _Y^o  
  // Draw the icon HCOsVTl,  
  dc.DrawIcon(x, y, m_hIcon); :/(G#ZaV  
 } h's[) t  
 else @] .s^ss9_  
 { RgoF4g+@  
  CDialog::OnPaint(); :j+E]|d(~6  
 } &k)+]r  
} =&pR=vl  
TSFrv8L  
HCURSOR CCaptureDlg::OnQueryDragIcon() +jrx;xwot  
{ Q% aF~  
 return (HCURSOR) m_hIcon; X#axCDM-  
} G--vwvL  
EUw4$Jt^p  
void CCaptureDlg::OnCancel() z&!o1uq  
{ 5L6.7}B  
 if(bTray) 1N _"Mm{  
  DeleteIcon(); $]?pAqU\  
  CDialog::OnCancel(); '*Y mYU  
} Z=-#{{bv  
%+/v")8+?  
void CCaptureDlg::OnAbout() `ci  P  
{ CPa+?__B  
 CAboutDlg dlg; K'8o'S_bF  
 dlg.DoModal(); 5Zc  
} XKp(31])  
EO'+r[Y  
void CCaptureDlg::OnBrowse() 8u[.s`^  
{ 9i#,V@  
 CString str; :fX61S6)  
 BROWSEINFO bi; miBCq l@x  
 char name[MAX_PATH]; Pi[]k]XA\  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); LkeYzQH/l  
 bi.hwndOwner=GetSafeHwnd(); 7g8\q@',  
 bi.pszDisplayName=name; w2 (}pz:  
 bi.lpszTitle="Select folder"; ,f>^ q"  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; !K_<7iExI\  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); n}%_H4t  
 if(idl==NULL) h Q Att  
  return; 9[{q5  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); 4cm~oZ  
 str.ReleaseBuffer(); 1jSmTI d  
 m_Path=str; qYqd-R  
 if(str.GetAt(str.GetLength()-1)!='\\') y54RD/`-  
  m_Path+="\\"; U2_;  
 UpdateData(FALSE); ZnbpIJ8cV  
} 6EWCJ%_  
,9:v2=C_  
void CCaptureDlg::SaveBmp() |a1zJ_t4  
{ wc6#C>=F  
 CDC dc; 8/"uS;yP  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); 1:h(8%H@"  
 CBitmap bm;  M+=q"#&  
 int Width=GetSystemMetrics(SM_CXSCREEN); ('_S1?y  
 int Height=GetSystemMetrics(SM_CYSCREEN); 6jal5<H  
 bm.CreateCompatibleBitmap(&dc,Width,Height); m&*0<N  
 CDC tdc; y(Pv1=e  
 tdc.CreateCompatibleDC(&dc); ,({% t  
 CBitmap*pOld=tdc.SelectObject(&bm); h 1j1PRE  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); -RThd"  
 tdc.SelectObject(pOld); U$ZbBVa`~  
 BITMAP btm; 2zjY|g/  
 bm.GetBitmap(&btm); gcM(K.n  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; FP6Jf I8  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); DqH]FS?]  
 BITMAPINFOHEADER bih; )/v`k>E  
 bih.biBitCount=btm.bmBitsPixel; /X\:3P  
 bih.biClrImportant=0; ]%5gPfv[T  
 bih.biClrUsed=0; Mb%[Qp60  
 bih.biCompression=0; <dY{@Cgw=  
 bih.biHeight=btm.bmHeight; J:;nN-\j  
 bih.biPlanes=1; {2&MyxV  
 bih.biSize=sizeof(BITMAPINFOHEADER); 6:TA8w|  
 bih.biSizeImage=size; SMm$4h R  
 bih.biWidth=btm.bmWidth; Sj'.)nz>  
 bih.biXPelsPerMeter=0; R<>uCF0  
 bih.biYPelsPerMeter=0; b@1";+(27  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); 28,HZaXhc  
 static int filecount=0; Gc!&I+kd  
 CString name; ukX KUYNm8  
 name.Format("pict%04d.bmp",filecount++); "8yDqm  
 name=m_Path+name; h3-dJgb  
 BITMAPFILEHEADER bfh; dC}4Er  
 bfh.bfReserved1=bfh.bfReserved2=0; LTio^uH  
 bfh.bfType=((WORD)('M'<< 8)|'B'); m3b?f B  
 bfh.bfSize=54+size; gG6BEsGa,  
 bfh.bfOffBits=54; D|5Fo'O^AV  
 CFile bf; MW.,}f  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ cA B^]j  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); I* JSb9r  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); fL R.2vJ  
  bf.WriteHuge(lpData,size); *&yt;|y  
  bf.Close(); E@ !~q  
  nCount++; T`^LWc"  
 } Os|F  
 GlobalFreePtr(lpData); N Y~y:*:Q  
 if(nCount==1) []eZO_o6j  
  m_Number.Format("%d picture captured.",nCount); c:z<8#A}  
 else {nmBIk2v  
  m_Number.Format("%d pictures captured.",nCount); 0\^K\J ,.  
  UpdateData(FALSE); 'WQ<|(:{  
} ID v|i.q3  
#kDJ>r |&-  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) oQ8If$a}  
{ wrt^0n'r)c  
 if(pMsg -> message == WM_KEYDOWN) 0Fm,F&12  
 { *+'l|VaVq\  
  if(pMsg -> wParam == VK_ESCAPE) -7l)mk  
   return TRUE; Ni 5Su  
  if(pMsg -> wParam == VK_RETURN) q\6ZmKGnT  
   return TRUE; q'awV5y  
 } 0xg6  
 return CDialog::PreTranslateMessage(pMsg); \?.Tq24  
} rn8t<=ptH3  
@=1kr ^i  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) -( ,iwF b  
{ JmK[7t  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ m`lsUN,  
  SaveBmp(); C %o^AR  
  return FALSE; {n>W8sN<  
} GiN\@F!  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ #<|q4a{8  
 CMenu pop; P*;zDQy  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); j;']L}R  
 CMenu*pMenu=pop.GetSubMenu(0); *aF<#m v  
 pMenu->SetDefaultItem(ID_EXITICON); RI%ZT  
 CPoint pt; x GHS  
 GetCursorPos(&pt); =-qv[;%& 6  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); lE?F Wt  
 if(id==ID_EXITICON) xc+h Fx  
  DeleteIcon(); UE9r1g`z  
 else if(id==ID_EXIT) ?0VLx,kp  
  OnCancel(); M(2c{TT  
 return FALSE; G_] (7  
} <v)Ai;l,  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); c|'hs   
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) `n!<h,S'2  
 AddIcon(); 3[L)q2;}$N  
 return res; S?5z  
} $iA`_H`W  
0#mu[O  
void CCaptureDlg::AddIcon() i+V4_`  
{ 2ajQ*aNq  
 NOTIFYICONDATA data; +FoR;v)z=F  
 data.cbSize=sizeof(NOTIFYICONDATA); 0r+%5}|-K  
 CString tip; (Js'(tBhiU  
 tip.LoadString(IDS_ICONTIP); 5[|MO.CB$  
 data.hIcon=GetIcon(0); v?\bvg\E  
 data.hWnd=GetSafeHwnd(); 9* %Uoy:  
 strcpy(data.szTip,tip); 2EOt.4cP  
 data.uCallbackMessage=IDM_SHELL; ,z?Re)q m  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; [lsr[`SJ<  
 data.uID=98; m3k}Q3&6Z  
 Shell_NotifyIcon(NIM_ADD,&data); $siiG|)C1  
 ShowWindow(SW_HIDE); vTD`Ja#h  
 bTray=TRUE; ^AUmIyf_  
} $zTjh~ 9  
ESZ6<!S  
void CCaptureDlg::DeleteIcon() > @ulvHL  
{ 7K`A2  
 NOTIFYICONDATA data; rBP!RSl1  
 data.cbSize=sizeof(NOTIFYICONDATA); R4"g? e  
 data.hWnd=GetSafeHwnd(); u8*Uia*vwH  
 data.uID=98; :_tsS)Q2m  
 Shell_NotifyIcon(NIM_DELETE,&data); 1x]U&{do  
 ShowWindow(SW_SHOW); zb}:wUR  
 SetForegroundWindow(); 4b8!LzKS  
 ShowWindow(SW_SHOWNORMAL); e jwFQ'wTx  
 bTray=FALSE; <3QE3;4  
} oSt-w{ !  
gJ>?<F;  
void CCaptureDlg::OnChange() n-dO |3,  
{ S*:b\{[f>  
 RegisterHotkey(); er}/~@JJ  
} ]7ROCJ;  
)L`0VTw'M  
BOOL CCaptureDlg::RegisterHotkey() abtAkf  
{ POc< G^  
 UpdateData(); :?{ **&=  
 UCHAR mask=0; C}+w<  
 UCHAR key=0; u(SdjLf:  
 if(m_bControl) g!<@6\RB  
  mask|=4; B5!$5 Qc  
 if(m_bAlt) :a}hd^;[%8  
  mask|=2; LN?f w  
 if(m_bShift) dapQ5JT/  
  mask|=1; ?T70C9  
  key=Key_Table[m_Key.GetCurSel()]; }(dhXOf\q  
 if(bRegistered){ gmWRw{nS+  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); ow ~(k5k:  
  bRegistered=FALSE; u A:|#mO  
 } T<DQi  
 cMask=mask; GLt#]I"LY  
 cKey=key; @Wy>4B^  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); A5+vzu^  
 return bRegistered; 6.2_UN^<  
} /_?Ly$>'  
zMKW@  
  四、小结 y_38;8ex  
VLc=!W}  
  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:
3+5=?,请输入中文答案:八 正确答案:八