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
  • 7101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: Riu0;U( \  
  T;.#=h  
  一、实现方法 -_A0<A.  
{fk'g(E8([  
  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: ~hz]x^:  
\W #M]Q  
#pragma data_seg("shareddata") uvZ|6cM  
HHOOK hHook =NULL; //钩子句柄 lZ E x0  
UINT nHookCount =0; //挂接的程序数目 kM@8RAxA  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 u9}=g%TV  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 e|xRK?aVBu  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey 9G 9!=J  
static int KeyCount =0; CA:t](xqQ  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 <C]s\ "o-`  
#pragma data_seg() 8"RX~Igf  
QnVYZUgJeV  
  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。 !J'BAq[x  
'TezUBRAz  
  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: 8 w^i  
1j3mTP  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR :/d#U:I  
cKey,UCHAR cMask) Bo)w#X  
{ </Q<*@p?  
 BOOL bAdded=FALSE; YDdmT7Ow  
 for(int index=0;index<MAX_KEY;index++){ *|ubH?71%Y  
  if(hCallWnd[index]==0){ !V#(g./W  
   hCallWnd[index]=hWnd; .kGg }  
   HotKey[index]=cKey; 2NqlE  
   HotKeyMask[index]=cMask; ;1K.SDj  
   bAdded=TRUE; [y64%|m  
   KeyCount++; qeHb0G  
   break; 1Ep!U#Del  
  } XwE(&ZCf'b  
 } S 0,p:Wey  
 return bAdded; DMsxHAE1  
} /vBOf;L  
//删除热键 FE" ksi 9  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) *Xn{{  
{ &0+;E-_  
 BOOL bRemoved=FALSE; ;| )&aTdH  
 for(int index=0;index<MAX_KEY;index++){ /87?U; |V  
  if(hCallWnd[index]==hWnd){ -Wb/3 X  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ _cQTQ  
    hCallWnd[index]=NULL; >5'C<jc C  
    HotKey[index]=0; x9p,j  
    HotKeyMask[index]=0; TW7jp  
    bRemoved=TRUE; LlrUJ-uC7  
    KeyCount--; *[9FPya  
    break; iYEhrb  
   } PsjSL8]  
  } 6X$]d^)h{  
 } Y1h8O%?  
 return bRemoved; EuOrwmdj  
} I'Ui` :A  
96fbMP+7R  
XJ^dX]4  
  DLL中的钩子函数如下: q@1b{q#C5  
*I:^g  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) U(4>e!  
{ w@ALl#z;}  
 BOOL bProcessed=FALSE; *UJ.cQ}  
 if(HC_ACTION==nCode) _lcx?IV  
 { wJ,l"bnq  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 zy^t95/m  
   switch(wParam) V+G.TI P  
   {  ]q~ _  
    case VK_MENU: v0+mh]  
     MaskBits&=~ALTBIT; Lq : !?)I  
     break; GTgG0Ifeh  
    case VK_CONTROL: &Azfpv   
     MaskBits&=~CTRLBIT; >1q W*  
     break; *DfwTbg|  
    case VK_SHIFT: Osz:23(p  
     MaskBits&=~SHIFTBIT; }TfZ7~o[  
     break; .dM4B'OA?  
    default: //judge the key and send message " iAwD8-  
     break; @#m@ .   
   } 82d~>i%T  
   for(int index=0;index<MAX_KEY;index++){ *L7&P46  
    if(hCallWnd[index]==NULL) .{r0Szm.  
     continue; <vS3 [(  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) YytO*^e}}  
    { LGu K@^  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); Y]MB/\gj  
     bProcessed=TRUE; W@S>#3,  
    } W5a7HkM  
   } .l1uqCuB  
  } SlK 6KnX  
  else if((lParam&0xc000ffff)==1){ //有键按下 DD$YMM  
   switch(wParam) %)'# d  
   { 3(&f!<Uy  
    case VK_MENU: Uphme8SX  
     MaskBits|=ALTBIT; Hst]}g' .  
     break; K9 G1>*  
    case VK_CONTROL: ~| CWy  
     MaskBits|=CTRLBIT; #^FDG1=  
     break; |-+IF,j  
    case VK_SHIFT: ut/3?E1 Z  
     MaskBits|=SHIFTBIT; kz30! L  
     break; L'A9TW2  
    default: //judge the key and send message +wPXDN#R  
     break; JJE?!Yvc  
   } Dt]N&E#\D  
   for(int index=0;index<MAX_KEY;index++){ fGtYvl O-5  
    if(hCallWnd[index]==NULL) "/ 9EUbca  
     continue; rg5ZxN|g  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) Xg4i H5!E  
    { Z(h.)$yH*=  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); (g HCu  
     bProcessed=TRUE; ./l^Iz&0  
    } GBg~NkC7.  
   } NpPuh9e{  
  } -|.Izgc  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 5 *R{N ~>  
   for(int index=0;index<MAX_KEY;index++){ MrU0Jrk4+  
    if(hCallWnd[index]==NULL) ](@HPAG]  
     continue; ; <NK  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0))  B=d :r  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); /}kG$ ~  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 |d)*,O4s  
   } 9\ulS2d  
  } u5Tu~  
 } (&osR|/Tq  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); fHV%.25  
} 3QF/{$65!  
!'qY  
  抓图程序是一个基于对话框的程序,它在建立对话框的时候调用前面的DLL,登记热键,因此需要将hook.lib添加到工程里,在程序里给出两个DLL函数的定义,也可以写个头文件,再包含进来以下代码: T1*%]6&V|  
,'Sj:l  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); fw3P?_4;*  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); G4;5$YGG  
\ 9!hg(-F  
  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: zg>)Lq|VsT  
[C^&iLX/F*  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) pf8M0,AY  
{ 'c/S$_r  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) cp_<y)__  
 { xO_u  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 rNN ,!  
  SaveBmp(); H.)Y*zK0.  
  return FALSE; 4K(oOxc9.  
 } xP7#`S6W  
 …… //其它处理及默认处理 Dbg,|UH  
} q|zips,  
80GBkFjV  
k-!Jww  
  将屏幕图像保存到BMP文件中的任务是由函数SaveBmp()来完成的,具体实现参见代码部分。另外为了顺利实现屏幕抓图,程序中还实现了"托盘"功能,由于这一部分本书在实例中已经专门介绍过了,所以不再赘述,读者朋友可以参考相关实例。 w.o>G2u  
8= "01  
  最后需要提醒读者朋友们注意的是,源程序的编译与使用时要先编译hook.dll并将其放在系统目录(win2000/NT是system32,98/ME是system),然后编译对话框程序运行即可。 ;k:17&:8ue  
 /~1Ew  
  二、编程步骤 PpLuN12H  
&V(;zy4(R  
  1、 启动Visual C++,生成一个DLL项目和一个基于对话框的应用程序项目,并将两个项目分别命名为"Hook"和"Capture"; 34F;mr"yp  
92(P~Sdv  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; &dky_H  
3lsfT-|Wt&  
  3、 在"Capture"项目中按照图一所示设置对话框的界面,具体设置参见代码部分; [x{Ai( /T^  
4DgH/Yo  
  4、 使用Class Wizard在"Capture"项目中添加按钮的鼠标单击消息响应函数,并重载对话框的WindowProc()函数; +5x{|!Pn  
q:MSV{k  
  5、 添加代码,编译运行程序。 ]4onY >  
hS'!JAM>Q  
三、程序代码 qM18 Ji*  
N c(f+8  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL e<$s~ UXv  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) 1t/mq?z:  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ 7g>|e  
#if _MSC_VER > 1000 : G'a"%x  
#pragma once v^dQ%+}7>  
#endif // _MSC_VER > 1000 _0|@B8!J?  
#ifndef __AFXWIN_H__ kgHZaQnD  
#error include 'stdafx.h' before including this file for PCH @|:yK|6O  
#endif >rXDLj-e  
#include "resource.h" // main symbols BA8g[T A7K  
class CHookApp : public CWinApp ~gdnD4[G  
{ ?c<uN~fC=  
 public: ;}H*|"z;!  
  CHookApp(); [jR >.H'  
  // Overrides LP'~7FG  
  // ClassWizard generated virtual function overrides Q`!^EyRA:^  
  //{{AFX_VIRTUAL(CHookApp) =I0J1Ob  
 public: hmB`+?,z*  
  virtual BOOL InitInstance(); XS$#\UQ  
  virtual int ExitInstance(); ! u@JH`  
  //}}AFX_VIRTUAL _jb&=f8  
  //{{AFX_MSG(CHookApp) i&q_h>ZT g  
  // NOTE - the ClassWizard will add and remove member functions here. PJT$9f~3;.  
  // DO NOT EDIT what you see in these blocks of generated code ! ^CK D[s  
  //}}AFX_MSG R*?!xDJ  
  DECLARE_MESSAGE_MAP() N/eus"O;  
}; fohZ&f|>  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); A ^t _"J  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); nErr&{C  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); .X5A7 m  
BOOL InitHotkey(); -jzoGzC3  
BOOL UnInit(); L|nFN}da  
#endif YU XxQ|  
7m%[$X`  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. >2v<;.  
#include "stdafx.h" Cj=_WWo  
#include "hook.h" ktkS$  
#include <windowsx.h> 9 e|[9  
#ifdef _DEBUG >S8 n 8U  
#define new DEBUG_NEW hj\A-Yf  
#undef THIS_FILE c D .;  
static char THIS_FILE[] = __FILE__; =sso )/3  
#endif `.Zm}'  
#define MAX_KEY 100 7'gk=MQc  
#define CTRLBIT 0x04 P4LiU2C  
#define ALTBIT 0x02 96S$Y~G# &  
#define SHIFTBIT 0x01 3.9/mztS  
#pragma data_seg("shareddata") *\ B(-  
HHOOK hHook =NULL; `(DHa=s1  
UINT nHookCount =0; fQ1Dp  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey FAdTp.   
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT i/Nc)kKL  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey $$SJLV  
static int KeyCount =0;  vY"I  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift }|&^Sg%95  
#pragma data_seg() {?q`9[Z  
HINSTANCE hins; ?]aVRmL  
void VerifyWindow(); ?B@3A)a  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) q#1G4l.  
//{{AFX_MSG_MAP(CHookApp) [XH,~JZJj  
// NOTE - the ClassWizard will add and remove mapping macros here. gvPHB+#A  
// DO NOT EDIT what you see in these blocks of generated code! :S}ZF$ $j%  
//}}AFX_MSG_MAP 0:-z+`RHE  
END_MESSAGE_MAP() @BPQ >  
9Z f  
CHookApp::CHookApp() |`pBI0Sjo  
{ _ nz^+  
 // TODO: add construction code here, `gF`Sgz  
 // Place all significant initialization in InitInstance :5'hd^Q  
} nf[KD,f  
K9Onjs% U  
CHookApp theApp; `z.sWF|f!O  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) a8v\H8@X  
{ IWm@pfC+g  
 BOOL bProcessed=FALSE; Z [l+{  
 if(HC_ACTION==nCode) ^uphpABpD  
 { X$G:3uoN  
  if((lParam&0xc0000000)==0xc0000000){// Key up s&+`>  
   switch(wParam) ,7Ejb++/M,  
   { ?"T!<L  
    case VK_MENU: ZoYllk   
     MaskBits&=~ALTBIT; 65VTKlDD  
     break;  j=G  
    case VK_CONTROL: MiKq|  
     MaskBits&=~CTRLBIT; L_|iQwU%  
     break; "=KFag  
    case VK_SHIFT: k {vd1,HZ  
     MaskBits&=~SHIFTBIT; H|,d`@U  
     break; VKw.g@BY  
    default: //judge the key and send message ,\1Rf.  
     break; J5O/c,?g  
   } Jt0/*^'  
   for(int index=0;index<MAX_KEY;index++){ {X<_Y<  
    if(hCallWnd[index]==NULL) UUM:*X  
     continue; 9b&;4Yq!f  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) .wTb/x  
    { aIr"!. 4  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); 3RI6+Cgmn  
     bProcessed=TRUE; @3 +   
    } f_;tFP B  
   } %&lwp  
  } 8Fbt >-N<\  
  else if((lParam&0xc000ffff)==1){ //Key down Im};wJ&  
   switch(wParam) qlg.\H:W~  
   { V\Y, 4&bI  
    case VK_MENU: 1W-kZ(e  
     MaskBits|=ALTBIT; m(1ot M9  
     break; #,FXc~V  
    case VK_CONTROL: FPZ@6  
     MaskBits|=CTRLBIT; O-pH~E  
     break; nE0I[T(  
    case VK_SHIFT: ^JY:$)4["  
     MaskBits|=SHIFTBIT; EG_P^ <z  
     break; Zs;c0T ">  
    default: //judge the key and send message Sht3\cJ8  
     break; _{}^]ZB  
   } ;<6S\  
   for(int index=0;index<MAX_KEY;index++) 6Bd:R}yZP7  
   { 1Mx2%  
    if(hCallWnd[index]==NULL) /Tw $} 8  
     continue; R!\._m?\h  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) 4(Y-TFaf  
    { P.=Dd"La  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); RUut7[r  
     bProcessed=TRUE; 31%3&B:Ts  
    } !wKNYe  
   } ^L\w"`,~  
  } \[8uE,=|  
  if(!bProcessed){ Xg;<?g?k  
   for(int index=0;index<MAX_KEY;index++){ ;qUd]c9oi  
    if(hCallWnd[index]==NULL) |="Y3}a  
     continue; :Fh_Ya0  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) AvuGAlP  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); OKj\>3  
   } |uRYejj#j  
  } MQy,[y7I  
 } `V*$pHo  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); =^zOM6E1ZF  
} Cs,t:ajP  
bZ+H u~  
BOOL InitHotkey() c.>OpsF  
{ 1vq c8lC  
 if(hHook!=NULL){ Go~3L8 '  
  nHookCount++; wc}4:~  
  return TRUE; q _:7uQ  
 } sE^= ]N  
 else Xcg+ SOB  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); )Oj{x0{\Q  
  if(hHook!=NULL) "`[4(j  
   nHookCount++; ;M *G  
  return (hHook!=NULL); HLq2a vs\  
} o'YK\L!p  
BOOL UnInit() 1t#|MH ?U_  
{ 'puiahA  
 if(nHookCount>1){ 3nUC,T%  
  nHookCount--; r+h$]OJ  
  return TRUE; /86PqKU(P  
 } gy5R"_MU  
 BOOL unhooked = UnhookWindowsHookEx(hHook); 0qN+W&H  
 if(unhooked==TRUE){ #ePtfRzJ  
  nHookCount=0; 4zqO!nk  
  hHook=NULL; f!cYLU1e@  
 } ?T'a{ ~]R  
 return unhooked; h$$i@IO0  
} FyllVrK  
q]P$NeEiZ"  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) D<bH RtP  
{ 2>kk6=<5'  
 BOOL bAdded=FALSE; }#`-mRaU  
 for(int index=0;index<MAX_KEY;index++){ IvB)d}p  
  if(hCallWnd[index]==0){ z'k@$@:0XD  
   hCallWnd[index]=hWnd; n%ZOR1u)k#  
   HotKey[index]=cKey; QG;V\2T2[  
   HotKeyMask[index]=cMask; R!RgQwEak  
   bAdded=TRUE; Q::_i"?c  
   KeyCount++; \7 *"M y*  
   break; #AH<dS  
  } e>b|13X  
 } 2U'Vq  
 return bAdded; $1bzsB|^  
} T^ RYN  
GFYHt!&[\  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) |SwW*C  
{ !u=A9i!  
 BOOL bRemoved=FALSE; i0{sE  
 for(int index=0;index<MAX_KEY;index++){ 7DW HADr  
  if(hCallWnd[index]==hWnd){ 3;wOA4ur  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ Q=F4ZrNqD  
    hCallWnd[index]=NULL; f9?f!k  
    HotKey[index]=0; ?0'db  
    HotKeyMask[index]=0; NFBhnNH+  
    bRemoved=TRUE; ^<+V[ =X  
    KeyCount--; {3|h^h_R  
    break; DM3 %+ xY  
   } 78FLy7  
  } fO 6Jug  
 } sx@ %3j  
 return bRemoved; qnTW?c9Z5  
} {M P (*N  
E6s)J -a  
void VerifyWindow() tZ_D.syBAc  
{ i'uSu8$'*  
 for(int i=0;i<MAX_KEY;i++){ "D7wtpJ  
  if(hCallWnd!=NULL){ |)b:@q3k+n  
   if(!IsWindow(hCallWnd)){ Zo T8  
    hCallWnd=NULL; ) 0|X];sD  
    HotKey=0; :a'[ 4w  
    HotKeyMask=0; L3'$"L.|u  
    KeyCount--; 4-~S"T8<u  
   } i 3i  
  } _REAzxe S  
 } ^#)]ICV  
} XSe\@t~&g  
)^LiAL h  
BOOL CHookApp::InitInstance() KU*XRZu)  
{ 8m 5T  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); 8 ;"HM5+  
 hins=AfxGetInstanceHandle(); 7~m[:Eg6[s  
 InitHotkey(); %>!$ eCX  
 return CWinApp::InitInstance(); I7Xm~w!{qk  
} K%WG[p\Eu  
\,-e>  
int CHookApp::ExitInstance() l$g \t]  
{ a?8boN(  
 VerifyWindow(); !6*m<#Qm  
 UnInit(); ]jgMN7  
 return CWinApp::ExitInstance(); B2l5}"{ `  
} e^yfoE<7  
L^x h5{  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file J *;= f8  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) xt1Ug~5  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ ~UQX t r  
#if _MSC_VER > 1000 6 }>CPi#  
#pragma once <N,:w`g#  
#endif // _MSC_VER > 1000 XS=f>e1<W  
#R*7y%cO  
class CCaptureDlg : public CDialog !v<` ^`x9I  
{ =[nuesP'  
 // Construction ?ZP@H _w6}  
 public: =hi{J M  
  BOOL bTray; ;.Y-e Q,  
  BOOL bRegistered; iCtS<"@Yx  
  BOOL RegisterHotkey(); P71] Z  
  UCHAR cKey; 3@wio[  
  UCHAR cMask; g9@H4y6fe=  
  void DeleteIcon(); dF$&fo%  
  void AddIcon(); `wKd##v'@  
  UINT nCount; eL88lV]I  
  void SaveBmp(); Hq#q4Y  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor zx7A}rs3oX  
  // Dialog Data E?S  
  //{{AFX_DATA(CCaptureDlg) aRy" _dZ2  
  enum { IDD = IDD_CAPTURE_DIALOG }; ujS C  
  CComboBox m_Key; 13fyg7^JP  
  BOOL m_bControl; LjCUkbzQF  
  BOOL m_bAlt; 8(g}/%1mt3  
  BOOL m_bShift; Y2[ik<  
  CString m_Path; 1>L8EImx]V  
  CString m_Number; kK=f@l  
  //}}AFX_DATA IO7cRg'-F  
  // ClassWizard generated virtual function overrides '0v]?mM  
  //{{AFX_VIRTUAL(CCaptureDlg) Zs2;VW4RW  
 public: pgBIYeY,  
  virtual BOOL PreTranslateMessage(MSG* pMsg); +]p/.- Uw  
 protected: )M* Sg?L  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support |k#EYf#Y  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); X@za4d  
  //}}AFX_VIRTUAL AnoA5H  
  // Implementation Kx02 2rgDU  
 protected: v%7Gh -P  
  HICON m_hIcon; ? (M$r\\  
  // Generated message map functions V/tl-;W  
  //{{AFX_MSG(CCaptureDlg) f.0HIc  
  virtual BOOL OnInitDialog(); z9w]{Zd_,d  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); 5xQ5)B4k  
  afx_msg void OnPaint(); 9<.8mW^68  
  afx_msg HCURSOR OnQueryDragIcon(); `4wy *!]  
  virtual void OnCancel(); qv[w 1;U"  
  afx_msg void OnAbout(); Zt}b}Bz  
  afx_msg void OnBrowse(); &FG0v<f5Pv  
  afx_msg void OnChange(); M zF,is  
 //}}AFX_MSG *;T'=u_lR  
 DECLARE_MESSAGE_MAP() ,6ae='=d  
}; 3;88a!AA!  
#endif |h6, .#n  
!Wj`U$];  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file WR_B:%W.  
#include "stdafx.h" SNf~%B?`L  
#include "Capture.h" [LrO"9q(  
#include "CaptureDlg.h" 2fXwJG'  
#include <windowsx.h> u Yc}eMb  
#pragma comment(lib,"hook.lib") +0%Y.O/{  
#ifdef _DEBUG OS1f}<  
#define new DEBUG_NEW fKO@Qx]  
#undef THIS_FILE goNDS5}  
static char THIS_FILE[] = __FILE__; k> ~D  
#endif v1/Y0  
#define IDM_SHELL WM_USER+1 {asq[;]  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); {REGoe=W%  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); di7cCn  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; k1SD{BL  
class CAboutDlg : public CDialog CZ>Ujw=&k  
{ nRT ]oAi  
 public: (M{>9rk8  
  CAboutDlg(); 4UND;I&  
  // Dialog Data Ucz=\dO1  
  //{{AFX_DATA(CAboutDlg) uo ;m  
  enum { IDD = IDD_ABOUTBOX }; 'T7Y5X80$j  
  //}}AFX_DATA TD78&a#  
  // ClassWizard generated virtual function overrides "U$](k.<VA  
  //{{AFX_VIRTUAL(CAboutDlg) x:h)\%Dg<  
 protected: qyh]v[  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support wFjQ1<s=  
  //}}AFX_VIRTUAL 4J?\JcGs  
  // Implementation .v-2A);I  
 protected: -$49l  
  //{{AFX_MSG(CAboutDlg) [+="I &  
  //}}AFX_MSG [)il_3t  
  DECLARE_MESSAGE_MAP() igEqty!.  
}; )1$H 7|  
\tY7Ga%c  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) N8=-=]0G  
{ Bwu?DK  
 //{{AFX_DATA_INIT(CAboutDlg) Ocn@JOg  
 //}}AFX_DATA_INIT +}Mm5^6*  
} 7xR:\FBa^  
N vTp1kI]  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) NG23  
{ yU"#2 *C  
 CDialog::DoDataExchange(pDX); P>$+XrTE  
 //{{AFX_DATA_MAP(CAboutDlg) |;^$IZSsz  
 //}}AFX_DATA_MAP {xOzxLB;  
} i6y=3k  
LabI5+g  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) EMdU4YnE"  
 //{{AFX_MSG_MAP(CAboutDlg) 2izBB,# "  
 // No message handlers C~'.3Q6  
 //}}AFX_MSG_MAP [fELf(;(  
END_MESSAGE_MAP() c%&*yR  
ZwiXeD+4  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) .ud&$-[a  
: CDialog(CCaptureDlg::IDD, pParent) sGpAaGY>  
{ :LC3>x`:  
 //{{AFX_DATA_INIT(CCaptureDlg) x?od_M;*8;  
  m_bControl = FALSE; " RIt  
  m_bAlt = FALSE; /CbiYm  
  m_bShift = FALSE; 6&L;Sw#Dg  
  m_Path = _T("c:\\"); (]10Z8"fJ  
  m_Number = _T("0 picture captured."); OYb:);o,iE  
  nCount=0; I]3!M`IMG  
  bRegistered=FALSE; @W~aoq6  
  bTray=FALSE; sE!g!ht  
 //}}AFX_DATA_INIT {XD':2E  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 Fq%NY8KNE  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); 2 gca *  
} 6\ .LG4@LO  
_::ssnG3jT  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) 2OqEyXh  
{ OKk" S_`  
 CDialog::DoDataExchange(pDX); d#W^S[[  
 //{{AFX_DATA_MAP(CCaptureDlg) .' h^  
  DDX_Control(pDX, IDC_KEY, m_Key); ub+XgNO  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); pRUQMPn (  
  DDX_Check(pDX, IDC_ALT, m_bAlt); @2hOy@V  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); `)MKCw$e  
  DDX_Text(pDX, IDC_PATH, m_Path); >;VZB/ d  
  DDX_Text(pDX, IDC_NUMBER, m_Number); $D D esy3  
 //}}AFX_DATA_MAP 4]-7S l,  
} q|r*4={^!*  
{>XoE %  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) oq|`;k   
//{{AFX_MSG_MAP(CCaptureDlg) d>Nh<PqH6  
 ON_WM_SYSCOMMAND() v!$?;"d+  
 ON_WM_PAINT() @P i]kWW})  
 ON_WM_QUERYDRAGICON() %az6\"n  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) 4I|pkdF_  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) :_=YH+bZ  
 ON_BN_CLICKED(ID_CHANGE, OnChange) 4gWlSm)  
//}}AFX_MSG_MAP ]1W]  
END_MESSAGE_MAP() 8#o2qQ2+  
^L8:..+:  
BOOL CCaptureDlg::OnInitDialog() Wt=@6w&  
{ k2PK4Ua_}q  
 CDialog::OnInitDialog(); ]!a?Lr  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); 5r~hs6H  
 ASSERT(IDM_ABOUTBOX < 0xF000); $H]NC-\+>  
 CMenu* pSysMenu = GetSystemMenu(FALSE); joZd  
 if (pSysMenu != NULL) o)DO[  
 { /^bU8E&^M  
  CString strAboutMenu; "V`DhOG&  
  strAboutMenu.LoadString(IDS_ABOUTBOX); T=@Ygjk  
  if (!strAboutMenu.IsEmpty()) i&DUlmt)f  
  { B ?y[ %i  
   pSysMenu->AppendMenu(MF_SEPARATOR); %=\*OIhl  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); z^WY5~?  
  } ~ t N/  
 } DZEq(>mn  
 SetIcon(m_hIcon, TRUE); // Set big icon ;d]vAj  
 SetIcon(m_hIcon, FALSE); // Set small icon )@y7 qb  
 m_Key.SetCurSel(0); !C^>tmqS  
 RegisterHotkey(); oEj$xm_}  
 CMenu* pMenu=GetSystemMenu(FALSE); U)Tl<l<  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); =En1?3?  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); ,Tk53 "  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); GZY:EHuz[  
 return TRUE; // return TRUE unless you set the focus to a control m@0> =s~.  
} )p:+!sX(  
yUO%@;  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) kf9]nIo  
{ JLjs`oq h  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) p1mAoVxR  
 { k72NXagh  
  CAboutDlg dlgAbout; :C,}DyZy  
  dlgAbout.DoModal(); y-gXGvZ  
 } P4|A\|t  
 else e#F3KLSL`  
 { ,^eOwWV  
  CDialog::OnSysCommand(nID, lParam); J6rWe  
 } R4$(NNC+/  
} %P(2uesd  
S1C#5=  
void CCaptureDlg::OnPaint() i<=2 L?[.I  
{ N3oa!PE  
 if (IsIconic()) hFhC&2HN  
 { 9JJ6$cLF  
  CPaintDC dc(this); // device context for painting 6k<3,`VV|  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); : Cli8#  
  // Center icon in client rectangle UDnCHGq  
  int cxIcon = GetSystemMetrics(SM_CXICON); 1|:;~9n<t  
  int cyIcon = GetSystemMetrics(SM_CYICON); F6:LH,~8   
  CRect rect; t2rZ%[O  
  GetClientRect(&rect); 5Kk}sxol  
  int x = (rect.Width() - cxIcon + 1) / 2; 7;] IlR6  
  int y = (rect.Height() - cyIcon + 1) / 2; -SzCeq(p%5  
  // Draw the icon ;4Xx5*E  
  dc.DrawIcon(x, y, m_hIcon); 'AmA3x)9u  
 } Vf=,@7  
 else QXEZ?gx  
 { X?/32~\  
  CDialog::OnPaint(); =2vZqGO30  
 } `1y@c"t  
} */$]kE  
oU*e=uehj  
HCURSOR CCaptureDlg::OnQueryDragIcon() x`'s  
{ m2ph8KC  
 return (HCURSOR) m_hIcon; &?}h)U#:  
} Q trU_c2k  
vVsaGW   
void CCaptureDlg::OnCancel() ^1aY,6I:  
{ :r{W)(mm  
 if(bTray) w[ )HQ1K  
  DeleteIcon(); [?g}<fa  
  CDialog::OnCancel(); #sbW^Q'I  
} fQ_tXY  
%(s2{$3  
void CCaptureDlg::OnAbout() q>6,g>I  
{ 9,"gXsvx(  
 CAboutDlg dlg; HPo><u  
 dlg.DoModal(); i=fhK~Jd  
} ^a!oq~ZSy  
sp0_f;bC  
void CCaptureDlg::OnBrowse() UCo<ie\V  
{ K;TTGK  
 CString str; yC!>7@m  
 BROWSEINFO bi; qi8AK(v  
 char name[MAX_PATH]; N2u4MI2  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); Oj2=&uz  
 bi.hwndOwner=GetSafeHwnd(); !yKrA|w1  
 bi.pszDisplayName=name; gDX\ p>7  
 bi.lpszTitle="Select folder"; *_a jb:  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; -YipPo"a  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); u}?{1B!  
 if(idl==NULL) CwO$EL:[`  
  return; ~4ijiw$  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); $u)#-X;x  
 str.ReleaseBuffer(); KT<N ;[;  
 m_Path=str; Xxm7s S  
 if(str.GetAt(str.GetLength()-1)!='\\') a3He-76  
  m_Path+="\\"; %r:4'$E7|  
 UpdateData(FALSE); I7<UC{Ny  
} oV~S4|9:  
g+C~}M_7  
void CCaptureDlg::SaveBmp() #vPk XcP  
{ obgO-d9l  
 CDC dc; W:2]d  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); XKT[8o<L  
 CBitmap bm; 3b<;y%  
 int Width=GetSystemMetrics(SM_CXSCREEN); _IvqZ/6Y(  
 int Height=GetSystemMetrics(SM_CYSCREEN); 2d&HSW  
 bm.CreateCompatibleBitmap(&dc,Width,Height); 9*CRMkPrd  
 CDC tdc; 3tmS/ tQp  
 tdc.CreateCompatibleDC(&dc); +# @2,  
 CBitmap*pOld=tdc.SelectObject(&bm); ZYz8ul$E  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); !Jaj2mS.N  
 tdc.SelectObject(pOld); +n|@'= ]  
 BITMAP btm; 9;A9Q9Yr  
 bm.GetBitmap(&btm); 2o0WS~}5  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; X>MDX.Z  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); M7(]NQ\TQ  
 BITMAPINFOHEADER bih; &tlU.Whk+  
 bih.biBitCount=btm.bmBitsPixel; `Z (`  
 bih.biClrImportant=0; Q+E)_5_sA  
 bih.biClrUsed=0; z+nq<%"'  
 bih.biCompression=0; ZVCa0Km  
 bih.biHeight=btm.bmHeight; "s\himoa  
 bih.biPlanes=1; H*&!$s.  
 bih.biSize=sizeof(BITMAPINFOHEADER); VS5D)5w#  
 bih.biSizeImage=size; /,ISx }  
 bih.biWidth=btm.bmWidth; j<A; i  
 bih.biXPelsPerMeter=0; #23($CSE  
 bih.biYPelsPerMeter=0; Mbtk:GuY  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); W)u9VbPk[  
 static int filecount=0; &3YXDNm  
 CString name; #:[CF:  
 name.Format("pict%04d.bmp",filecount++); 28 ;x5m)N  
 name=m_Path+name; G5$YXNV  
 BITMAPFILEHEADER bfh; >NBwtF>  
 bfh.bfReserved1=bfh.bfReserved2=0; F2$?[1^f  
 bfh.bfType=((WORD)('M'<< 8)|'B'); G2FD'Sf  
 bfh.bfSize=54+size; ^FK-e;J  
 bfh.bfOffBits=54; =UZm4=T  
 CFile bf; 8s6^!e&  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ cb_nlG!  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); bbFzmS1  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); 1K{hj%  
  bf.WriteHuge(lpData,size); TiSV`V q  
  bf.Close(); PKt;]T0  
  nCount++; uSNlI78D  
 } :ZU-Vi.b  
 GlobalFreePtr(lpData); :n$?wp  
 if(nCount==1) Ny 7vId  
  m_Number.Format("%d picture captured.",nCount); #(r1b'jfP  
 else SHe547X1  
  m_Number.Format("%d pictures captured.",nCount); =tqChw   
  UpdateData(FALSE); w)%/Me3o  
} e&F=w`F\  
RVa{%   
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) + :k"{I   
{ X5o{d4R L  
 if(pMsg -> message == WM_KEYDOWN) J"yq)0  
 { v^1n.l %E  
  if(pMsg -> wParam == VK_ESCAPE) _t\)W(E&  
   return TRUE; fBct%M 3  
  if(pMsg -> wParam == VK_RETURN) WlnS.P\+E  
   return TRUE; ^1z)\p1  
 } 6g%~~hX  
 return CDialog::PreTranslateMessage(pMsg);  uE3xzF  
} .jbT+hhM  
Z}$1~uyw  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) 2)jf~!o)Z  
{ (Ei} :6,}  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ +We=- e7  
  SaveBmp(); RV, cQ K  
  return FALSE; c:_dW;MJ0  
} Pxe7 \e  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ >d5L4&r  
 CMenu pop; ]d50J@W c  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); A>QAR)YP  
 CMenu*pMenu=pop.GetSubMenu(0); 6ragRS/'x  
 pMenu->SetDefaultItem(ID_EXITICON); lhduK4u  
 CPoint pt; dmUa\1g#  
 GetCursorPos(&pt); *Au[{sR  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); K&/!3vc  
 if(id==ID_EXITICON) 6gJc?+  
  DeleteIcon(); !eGUiE=  
 else if(id==ID_EXIT) $h8,QPy  
  OnCancel(); .Sjg  
 return FALSE; xY1@Ja  
} 3B[u2o>  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); be:=-B7!  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) tz`T#9  
 AddIcon(); qJT|om L Y  
 return res; #EX NSr  
} v!%VH?cA8  
=!P$[pN2  
void CCaptureDlg::AddIcon() O*+,KKPt  
{ d m$iiRY  
 NOTIFYICONDATA data; Q DJe:\n  
 data.cbSize=sizeof(NOTIFYICONDATA); 4+4C0/$Y  
 CString tip; 5!}fd/}Uk  
 tip.LoadString(IDS_ICONTIP); PBp+(o-  
 data.hIcon=GetIcon(0); x]<0Kq9K  
 data.hWnd=GetSafeHwnd(); z)XI A)i6  
 strcpy(data.szTip,tip); 1\ab3n  
 data.uCallbackMessage=IDM_SHELL; &U0Y#11Cx  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; Gjo&~*;  
 data.uID=98; ,NoWAmv  
 Shell_NotifyIcon(NIM_ADD,&data); NM&R\GI  
 ShowWindow(SW_HIDE); \s">trXwX  
 bTray=TRUE; #i0f}&  
} Q!v]njCIB7  
EK<ly"S.  
void CCaptureDlg::DeleteIcon()  _V_GdQ  
{ }@Ou]o  
 NOTIFYICONDATA data; Nkg^;-CV0  
 data.cbSize=sizeof(NOTIFYICONDATA); ?emYLw  
 data.hWnd=GetSafeHwnd(); cHk ?$  
 data.uID=98; 40R7@Vaf  
 Shell_NotifyIcon(NIM_DELETE,&data); 7) 37AKw  
 ShowWindow(SW_SHOW); $J)2E g  
 SetForegroundWindow(); x|q|> dPB  
 ShowWindow(SW_SHOWNORMAL); &VfMv'%x  
 bTray=FALSE; b 3i34,  
} f~Q]"I8w  
/E<:=DD<  
void CCaptureDlg::OnChange() 9>hK4&m^  
{ 'NDDj0Y  
 RegisterHotkey(); P1A5Qq  
} I2^ Eo5'  
eL{6;.C  
BOOL CCaptureDlg::RegisterHotkey() ^mu PjM+D  
{ & 24$*Oe  
 UpdateData(); ooIA#u  
 UCHAR mask=0; w-?|6I}T  
 UCHAR key=0; 2<33BBlWA  
 if(m_bControl) QTT2P(Pz  
  mask|=4; vfPIC!  
 if(m_bAlt) @]xH t&j  
  mask|=2; l~c# X3E  
 if(m_bShift) N@G~+GCxL  
  mask|=1; 2V)qnMxAZJ  
  key=Key_Table[m_Key.GetCurSel()]; i*2l4  
 if(bRegistered){ UhVJ !NrT  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); * J|]E(  
  bRegistered=FALSE; kcyT#'=j  
 } n06Jg+  
 cMask=mask; To@77.'  
 cKey=key; =%ZR0cWPoI  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); D;QV`Z% I  
 return bRegistered; WpPI6bd  
} U Rb  
1J @43>u{  
  四、小结 7zEpuw  
&=`6- J  
  本实例通过一个钩子DLL实现了屏幕抓图的功能,它有一个缺陷,那就是只能保存整个屏幕图像,不过读者朋友可以在此基础上,实现屏幕任意区域的抓图功能,具体方法不再赘述,实现起来很容易的了,呵呵。
评价一下你浏览此帖子的感受

精彩

感动

搞笑

开心

愤怒

无聊

灌水
描述
快速回复

您目前还是游客,请 登录注册
欢迎提供真实交流,考虑发帖者的感受
认证码:
验证问题:
10+5=?,请输入中文答案:十五