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
  • 4907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: :8A@4vMS)?  
  ?*~sx=mC  
  一、实现方法 zu,Yuq  
l4& l)4Rx  
  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: .OlPVMFt  
R I:kp.V  
#pragma data_seg("shareddata") }LoMS<O-[  
HHOOK hHook =NULL; //钩子句柄 34J*<B[Njo  
UINT nHookCount =0; //挂接的程序数目 0~Xt_rN](  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 5>VX]nE3!  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 Z4sS;k]}  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey MIqH%W.r u  
static int KeyCount =0; "EZpTy}Ee  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 @z`eqG,']  
#pragma data_seg() @=BApuer+  
x+[ATZ([  
  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。 #[Rs&$vQm  
rrG}; A  
  DLL中的两个输出函数分别用来添加/删除热键,函数代码如下: RW<4",  
m;ju@5X  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR R_ )PbFw  
cKey,UCHAR cMask) m!3D5z]n9  
{ uF[~YJ>  
 BOOL bAdded=FALSE;  +&<k}Mz  
 for(int index=0;index<MAX_KEY;index++){ 7zowvE?#  
  if(hCallWnd[index]==0){ 60WlC0Y~u  
   hCallWnd[index]=hWnd; r,:acK  
   HotKey[index]=cKey; ONF x -U]  
   HotKeyMask[index]=cMask; \:2z!\iP`  
   bAdded=TRUE; tY#Zl 54~{  
   KeyCount++; `w)yR>lqh  
   break; XI,=W  
  } O.{  
 } 6lUC$B Y  
 return bAdded; z]2lT IWg  
} $h5QLN  
//删除热键 wU"w  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) (#]9{ C;  
{ BQB<+o'  
 BOOL bRemoved=FALSE;   Xi w  
 for(int index=0;index<MAX_KEY;index++){ Yaz/L)Y;R  
  if(hCallWnd[index]==hWnd){ U6YHq2<  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ ;s+3 #Py  
    hCallWnd[index]=NULL; =>@ X+4Kb  
    HotKey[index]=0; ~Q}!4LH  
    HotKeyMask[index]=0; \~  l"  
    bRemoved=TRUE; i9T<(sdK+  
    KeyCount--; 35:RsL  
    break; Ve<f}  
   } d?V/V'T[  
  } ^UFNds'q  
 } C 1)+^{7ef  
 return bRemoved; 2#s8Dxt  
} Oc5f8uv  
U U#tm  
VH vL:z  
  DLL中的钩子函数如下: [p]UM;+  
 pQ7<\8s*  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) }nSu7)3$B  
{ L^K,YlNBR  
 BOOL bProcessed=FALSE; bgkBgugZhX  
 if(HC_ACTION==nCode) 3Zwhv+CP[  
 { _9?v?mL5;  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 Hoi~(Vc.  
   switch(wParam) { _Y'%Ggh  
   {  \C{Zqo,  
    case VK_MENU: /)<kG(Z  
     MaskBits&=~ALTBIT; .kJu17!  
     break; >;%LW} %  
    case VK_CONTROL: J|VDZ# c7  
     MaskBits&=~CTRLBIT; Y' 5X4Ks|  
     break; ja(ZJ[<`  
    case VK_SHIFT: r,Msg&rT  
     MaskBits&=~SHIFTBIT; [Mj5o<k;I  
     break; T&}KUX~Q/  
    default: //judge the key and send message b~(S;1NS'  
     break; tvJl&{-OX  
   } U8@P/Z9  
   for(int index=0;index<MAX_KEY;index++){ Bj\Us$cZ  
    if(hCallWnd[index]==NULL) ;vn0b"Fi3  
     continue; j,z)x[3}  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) ac1(lD  
    { MM( ,D& Z  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); :Y4Sdj  
     bProcessed=TRUE; 5'%O]~  
    } Q5_,`r`  
   } '2rSX[$ tf  
  } w4zp%`?D'  
  else if((lParam&0xc000ffff)==1){ //有键按下 *z0 R f;  
   switch(wParam) /+WC6&  
   { v?n# C  
    case VK_MENU: Y@qugQM>  
     MaskBits|=ALTBIT; IoV"t,  
     break; L x iN9  
    case VK_CONTROL: i+lq:St  
     MaskBits|=CTRLBIT; 6="o&!  
     break; K1-RJj\L  
    case VK_SHIFT: fgHsg@33N  
     MaskBits|=SHIFTBIT; Cv p#=x0  
     break; #Yy5@A}`o  
    default: //judge the key and send message 3_T'0x\FP  
     break; u=E &jL5U  
   } SzFh  
   for(int index=0;index<MAX_KEY;index++){ #MbY+[Y@v  
    if(hCallWnd[index]==NULL) #jO2Zu2`}  
     continue; NGEE'4!i7T  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) n7zM;@{7  
    { -^8OjGat  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); = \K/ulZo  
     bProcessed=TRUE; |:u5R%  
    } G=C2l# Ae!  
   } R@`xS<`L/  
  } % 3fpIzm  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 c;=St1eoz  
   for(int index=0;index<MAX_KEY;index++){ 0 t/mLw&  
    if(hCallWnd[index]==NULL) !"aGo1 $$  
     continue; ;6?,Yhk$h  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) @Y+kg  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); [FBc&HN  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 9_Z_5w;h  
   } #W8c)gkG9  
  } YF%]%^n  
 } f/Z-dM\e  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); vq@"y%C4  
} "u{ymJ]t  
E;"VI2F  
  抓图程序是一个基于对话框的程序,它在建立对话框的时候调用前面的DLL,登记热键,因此需要将hook.lib添加到工程里,在程序里给出两个DLL函数的定义,也可以写个头文件,再包含进来以下代码: -W: @3\{  
5r;)Ppo  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask);  U8% IpI;  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); E^~ {thf  
&]anRT#  
  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: (X (:h\^  
t*Z-]P  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) ?wjk=hM2  
{ 0\eSiXs  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) Cq-99@&;  
 { Eok8+7g0&  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 z_8Bl2tl  
  SaveBmp(); =CL,+  
  return FALSE; psS^  
 } $-E<{   
 …… //其它处理及默认处理 "'>fTk_  
} ]*0t?'go'  
!u`f?=s;  
O_5;?$[m  
  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。 e0#{'_C  
@#9xSs#  
  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。 tao9icl*`  
:MH=6  
  二、编程步骤 a &`^M  
g7eI;Tpv  
  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"; 64:p 4N  
3@<m/%  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; TETfRnm  
P+3 ]g{2w  
  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; !=+;9Ry$z  
*6v5JH&K  
  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; aQso<oK  
q@4Cw&AI+  
  5、 添加代码,编译运行程序。 FE06,i\{  
~0vNs2D,S  
三、程序代码 &3*r-9BZ  
)F0Q2P1I  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL B\`${O(  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) cL"Ral-qB  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ 5+)_d%v=6!  
#if _MSC_VER > 1000 O /h1ew  
#pragma once M@0S*[O{"  
#endif // _MSC_VER > 1000 )EN ,Ry  
#ifndef __AFXWIN_H__ 6$fwpW  
#error include 'stdafx.h' before including this file for PCH gX* &RsF  
#endif cr^R9dv  
#include "resource.h" // main symbols "7?xaGh8  
class CHookApp : public CWinApp 1+tPd7U  
{ 5)w;0{X!P  
 public: @*$"6!3s5  
  CHookApp(); aCBq}Xcn  
  // Overrides 0s.4]Zg>5  
  // ClassWizard generated virtual function overrides m# ^).+  
  //{{AFX_VIRTUAL(CHookApp) ork{a.1-_w  
 public: 2$gFiZ  
  virtual BOOL InitInstance(); t"6u  
  virtual int ExitInstance(); EV~?]Kt~  
  //}}AFX_VIRTUAL ;uuBX0B  
  //{{AFX_MSG(CHookApp) \i)@"}  
  // NOTE - the ClassWizard will add and remove member functions here. +H!aE}  
  // DO NOT EDIT what you see in these blocks of generated code !  GU xhn  
  //}}AFX_MSG I#zL-RXT  
  DECLARE_MESSAGE_MAP() YDEb MEMd/  
}; *#'&a(h B!  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); [,|4%Y  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); .O PBET(gv  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); 1ay{uU!EL  
BOOL InitHotkey(); #Vm)wH3  
BOOL UnInit(); R7x*/?  
#endif _cbXzSYq&  
b+71`aD0  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. W#9LK Jj  
#include "stdafx.h" TG.\C8;vFh  
#include "hook.h" WVL\|y728s  
#include <windowsx.h> 57$/Dn  
#ifdef _DEBUG g;y*F;0@  
#define new DEBUG_NEW 5WtI.7r  
#undef THIS_FILE &hzr(v~;  
static char THIS_FILE[] = __FILE__; 1w>G8  
#endif o6r ^  
#define MAX_KEY 100 r;fcBepO  
#define CTRLBIT 0x04 k6_OP]  
#define ALTBIT 0x02 ITjg]taD  
#define SHIFTBIT 0x01 ^ =H 10A  
#pragma data_seg("shareddata") a#3,qp!  
HHOOK hHook =NULL; z'EphL7r   
UINT nHookCount =0; mpl^LF[  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey 1sfs!b&E  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT ~hU^5R-%  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey 'W[Nr  
static int KeyCount =0; 83{v_M  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift @OC*:?!4  
#pragma data_seg()  /?6  
HINSTANCE hins; c5{3  
void VerifyWindow(); SxM5'KQ  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) By0Zz  
//{{AFX_MSG_MAP(CHookApp) $tebNi P  
// NOTE - the ClassWizard will add and remove mapping macros here. v1E(K09h2  
// DO NOT EDIT what you see in these blocks of generated code! 7L!q{%}  
//}}AFX_MSG_MAP )/t=g  
END_MESSAGE_MAP() &F +hh{  
RD*.n1N1  
CHookApp::CHookApp() e73zpF  
{ HOVzpj  
 // TODO: add construction code here, p2 m`pT  
 // Place all significant initialization in InitInstance Wt! NLlN8  
} it=ir9  
o31pF  
CHookApp theApp; 2>inyn)S  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) 4[K6ZDBU  
{ 5VlF\-  
 BOOL bProcessed=FALSE; DQ_ pLXCC  
 if(HC_ACTION==nCode) d^XRkB:h  
 { @]%c UjQ  
  if((lParam&0xc0000000)==0xc0000000){// Key up "J3n_3+  
   switch(wParam) RSf*[2  
   { l' a<k"  
    case VK_MENU: /I q6'oo  
     MaskBits&=~ALTBIT; g U v`G  
     break; b#_u.vP  
    case VK_CONTROL: +*$@ K'VL  
     MaskBits&=~CTRLBIT; Y; q['h  
     break; $C6O<A  
    case VK_SHIFT: ]N1gzHaS  
     MaskBits&=~SHIFTBIT; >2< Jb!f&  
     break; 0bR})}a+Yg  
    default: //judge the key and send message &n& ndq  
     break; QdP)-Fx  
   } ro@`S:  
   for(int index=0;index<MAX_KEY;index++){ @*~cmf&FIQ  
    if(hCallWnd[index]==NULL) `z`"0;,7S  
     continue; ]WC@*3'kye  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) j;i7.B"[  
    { Dad*6;+N  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); QgW4jIbx  
     bProcessed=TRUE; iYzm<3n?  
    } ^2!l/(?  
   } l":Z. J  
  } ;S^7Q5-  
  else if((lParam&0xc000ffff)==1){ //Key down pkEqd"G  
   switch(wParam) OYNPZRu  
   { /9 soUt  
    case VK_MENU: _cXLQ)-  
     MaskBits|=ALTBIT; w]Vd IS  
     break; z T#j.v  
    case VK_CONTROL: rfc;   
     MaskBits|=CTRLBIT; KN zm)O  
     break; \Y}nehxG@  
    case VK_SHIFT: /g]m,Y{OI  
     MaskBits|=SHIFTBIT; o_ SR  
     break; qi-!iT(fe  
    default: //judge the key and send message h8tKYm  
     break; wr;8o*~  
   } i^u5j\pfY*  
   for(int index=0;index<MAX_KEY;index++) l+i9)Fc<i  
   { !3#*hL1fy  
    if(hCallWnd[index]==NULL) "]D2}E>U;  
     continue; 6/eh~ME=  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) F;_L/8Ov1  
    { ?W4IAbT\G  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); Z3 $3zyi  
     bProcessed=TRUE; - +=+W  
    } 7\1bq&a<  
   } R} aHo0r  
  } ,Q8)r0c  
  if(!bProcessed){ fu?Y'Qet  
   for(int index=0;index<MAX_KEY;index++){ RzLbPSTQ  
    if(hCallWnd[index]==NULL) <xQHb^:  
     continue; fo30f =^Gi  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) `l8^n0-  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); _ Tj`  
   } jB!Q8#&Q  
  } Z &R{jQ,  
 } ;.P9t`*  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); ]za1=~[  
} +gQoYlso  
mOvwdRKn  
BOOL InitHotkey() l~V^  
{ F2$Z4%x#  
 if(hHook!=NULL){ }^ j"@{~  
  nHookCount++; L z'05j3!  
  return TRUE; 2,O;<9au<  
 } Lg[_9 `\  
 else h tn?iLq  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); Dk XB  
  if(hHook!=NULL) RwC1C(ZP  
   nHookCount++; #(G#O1+  
  return (hHook!=NULL); LE:nmo  
} kmXaLt2Z  
BOOL UnInit() 4^mpQ.]lO  
{ Cp 2$I<T  
 if(nHookCount>1){ lIj2w;$v  
  nHookCount--; 2|n~5\K|t  
  return TRUE; C!8XFf8e  
 } 5ZkMd !$y  
 BOOL unhooked = UnhookWindowsHookEx(hHook); "e\:Cq>\  
 if(unhooked==TRUE){ ,#P eK(  
  nHookCount=0; f._FwD  
  hHook=NULL; Z ^tF  
 } HXTZ`'Rv  
 return unhooked; W\?_o@d  
} 7Bhi72&6  
]"< ` ^  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) Htf|VpzMb  
{ ;nbUbRb  
 BOOL bAdded=FALSE; P]4C/UDS-~  
 for(int index=0;index<MAX_KEY;index++){ BtN@P23>k.  
  if(hCallWnd[index]==0){ )wROPA\uA  
   hCallWnd[index]=hWnd; MR@*09zP(?  
   HotKey[index]=cKey;  OBCRZ   
   HotKeyMask[index]=cMask; 4M&6q(389  
   bAdded=TRUE; M"eiKX  
   KeyCount++; ytXXZ`  
   break; 4EiEE{9V  
  } C=6Vd  
 } [p+6HF  
 return bAdded; e!67Na0X(  
} 9 L{JU  
NyTv~8A`)  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) 0b0.xz\~U  
{ &?=UP4[oif  
 BOOL bRemoved=FALSE; W^Jh'^E  
 for(int index=0;index<MAX_KEY;index++){ U[b $VZ}  
  if(hCallWnd[index]==hWnd){ )kSE5|:pi  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ b=!G3wVw<  
    hCallWnd[index]=NULL; mV0.9pxS  
    HotKey[index]=0; 09{B6l6P  
    HotKeyMask[index]=0; g pN{1  
    bRemoved=TRUE; 0# D4;v  
    KeyCount--; p<\yp<g  
    break; `4& GumG  
   } (0Xgv3wd  
  } U!L<v!$  
 } e?%Qv+)W  
 return bRemoved; =Zcbfo_&  
} IGj%)_W  
bojx:g  
void VerifyWindow() q1Vh]d  
{ i6p0(OS&D  
 for(int i=0;i<MAX_KEY;i++){ =8?gx$r2  
  if(hCallWnd!=NULL){ FL+^r6DQ  
   if(!IsWindow(hCallWnd)){ .FS`Fh;  
    hCallWnd=NULL; vt3yCS  
    HotKey=0; w6M EY"<L  
    HotKeyMask=0; G(-1"7  
    KeyCount--; E.$1CGd+  
   } &>I4-D[  
  } 777N0,o(  
 } <j93   
} uX-]z3+  
U[1Ir92:  
BOOL CHookApp::InitInstance() oW*e6"<R7  
{ jjgjeY  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); w1-/U+0o  
 hins=AfxGetInstanceHandle(); -,t2D/xK  
 InitHotkey(); |@]`" k  
 return CWinApp::InitInstance(); }%B^Vl%ZZ  
} ~G!>2 +L  
F^Yt\V~T  
int CHookApp::ExitInstance() 15i8) 4h  
{ T&Y?IE}  
 VerifyWindow(); 3_JxpQg  
 UnInit(); E"e<9  
 return CWinApp::ExitInstance(); $= /.oh  
} 5+<<:5_6l  
Zb)j2Xgl  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file @<5?q: 9.8  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) "=0#pH1o  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ Y4Hi<JWo  
#if _MSC_VER > 1000 n%lY7.z8d  
#pragma once _u$X.5Q;  
#endif // _MSC_VER > 1000 `2S G{5o;  
xyK_1n@b  
class CCaptureDlg : public CDialog Re3vW re  
{ E"D+CD0  
 // Construction Sq,ZzMw  
 public: s7?Q[vN  
  BOOL bTray; t1,sG8Z  
  BOOL bRegistered; LHjGlBy  
  BOOL RegisterHotkey(); Y4]USU!PA  
  UCHAR cKey; zK`z*\  
  UCHAR cMask; kK]JN  
  void DeleteIcon(); /xmUu0H$R  
  void AddIcon(); >1[Hk0 <x  
  UINT nCount; Fa`/i v  
  void SaveBmp(); 85U')LY  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor `wt*7~'=  
  // Dialog Data lLy^@s  
  //{{AFX_DATA(CCaptureDlg) P8jXruZr  
  enum { IDD = IDD_CAPTURE_DIALOG }; \8%64ZL`  
  CComboBox m_Key; zfDx c3e  
  BOOL m_bControl; T!.6@g`x>  
  BOOL m_bAlt; %/17K2g  
  BOOL m_bShift; |cwGc\ES  
  CString m_Path; #<20vdc  
  CString m_Number; yk1syN_  
  //}}AFX_DATA IKhpe5}  
  // ClassWizard generated virtual function overrides @G  0k+  
  //{{AFX_VIRTUAL(CCaptureDlg) RI_:~^nO{r  
 public: |EuWzhNAO  
  virtual BOOL PreTranslateMessage(MSG* pMsg); Ur`Ri?  
 protected: ]2kgG*^n"  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support l][{ #>V  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); }Wf\\  
  //}}AFX_VIRTUAL : E `N0UA  
  // Implementation "V!y"yQ  
 protected: H"8fnN=xB  
  HICON m_hIcon; qy1$(3t$  
  // Generated message map functions q.6$-w  
  //{{AFX_MSG(CCaptureDlg) PYDf|S7  
  virtual BOOL OnInitDialog(); 'ojI_%9<  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); KD9Y  
  afx_msg void OnPaint(); ~C6Qp`VF  
  afx_msg HCURSOR OnQueryDragIcon(); ]K'iCYY  
  virtual void OnCancel(); "f|\":\  
  afx_msg void OnAbout(); ~GJJ{Bm_  
  afx_msg void OnBrowse(); WyH2` xxX  
  afx_msg void OnChange(); $Yh7N5XH,  
 //}}AFX_MSG OHixOI$O  
 DECLARE_MESSAGE_MAP() 5bZf$$b  
}; #gbJ$1s  
#endif `z<k7ig  
qiQS:0|_  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file qSh^|;2?R  
#include "stdafx.h" +qsNz*@p"  
#include "Capture.h" Gj]*_"T  
#include "CaptureDlg.h" z-*/jFE  
#include <windowsx.h> z_vFf0  
#pragma comment(lib,"hook.lib") %jKbRiz1u  
#ifdef _DEBUG $qk2!  
#define new DEBUG_NEW 2 F3U,}  
#undef THIS_FILE }ie\-V  
static char THIS_FILE[] = __FILE__; zoYw[YP9  
#endif sqw^Hwy=!2  
#define IDM_SHELL WM_USER+1 5\Sm^t|Tx  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); yrO \\No#H  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); %k(V 2]WF  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; AL%H$I  
class CAboutDlg : public CDialog :K{!@=o  
{ =ja(;uC  
 public: tPh``o  
  CAboutDlg(); MM8r*T4g/  
  // Dialog Data }Z5#{Sd  
  //{{AFX_DATA(CAboutDlg) D_fgxl  
  enum { IDD = IDD_ABOUTBOX }; ,B ]kX/W  
  //}}AFX_DATA p`ai2`qC`  
  // ClassWizard generated virtual function overrides DDh$n?2fd  
  //{{AFX_VIRTUAL(CAboutDlg) Tl9KL%9  
 protected: _MfXN$I?}  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support g+Z~"O]$M  
  //}}AFX_VIRTUAL &Pu}"M$[MH  
  // Implementation 1:S75~b-`  
 protected: QGE)Xn#_bN  
  //{{AFX_MSG(CAboutDlg) Z)B5g>  
  //}}AFX_MSG -}nTwx:|5u  
  DECLARE_MESSAGE_MAP() ^Wk.D-  
}; 6j9P`#Lt  
|V#h "s  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) B\BxF6 y  
{ ^W-03  
 //{{AFX_DATA_INIT(CAboutDlg) ,Q~C F;qe  
 //}}AFX_DATA_INIT ^i}*$ZC72  
} |` gSkv  
ajFSbi)l  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) !e*BQ3  
{ ^ s< p5V  
 CDialog::DoDataExchange(pDX); S EdNH.|I  
 //{{AFX_DATA_MAP(CAboutDlg) 7XLz Ewa  
 //}}AFX_DATA_MAP 6@_Vg~=S  
} g:bw;6^ u  
0KknsP7  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) W#1t%hT$  
 //{{AFX_MSG_MAP(CAboutDlg) n~xh %r;  
 // No message handlers dQ+{Dv3A  
 //}}AFX_MSG_MAP qI,4 uGg  
END_MESSAGE_MAP() }{<@wE%s  
V<f76U)  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) KCG-&p$v@s  
: CDialog(CCaptureDlg::IDD, pParent) |`d5Y#26  
{ -s Iji)t  
 //{{AFX_DATA_INIT(CCaptureDlg) "Xq.b"N{*  
  m_bControl = FALSE; %G!BbXlz  
  m_bAlt = FALSE; 595P04  
  m_bShift = FALSE; gKK*` L~  
  m_Path = _T("c:\\"); =#qf0  
  m_Number = _T("0 picture captured."); }Xv2I$J  
  nCount=0; >*v!2=  
  bRegistered=FALSE; Z~O1$,Z  
  bTray=FALSE; ! Ff/RRo  
 //}}AFX_DATA_INIT 1muB* O  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 9Tbi_6[  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); ^Y"c1f2  
} J)R;NYl  
zX+NhTTB  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX)  'Q\I@s }  
{ /DPD,bA  
 CDialog::DoDataExchange(pDX); 9Yg=4>#$  
 //{{AFX_DATA_MAP(CCaptureDlg) <4!SQgL  
  DDX_Control(pDX, IDC_KEY, m_Key); 96Kv!  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); Cnp\2Fu/  
  DDX_Check(pDX, IDC_ALT, m_bAlt); XD>(M{~  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); at_~b Ox6X  
  DDX_Text(pDX, IDC_PATH, m_Path); Na8%TT>  
  DDX_Text(pDX, IDC_NUMBER, m_Number); [0v`E5  
 //}}AFX_DATA_MAP 7Ddo ^Gtx  
} 9z)p*+r UK  
R{zAs?j  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) ,[6N64fy  
//{{AFX_MSG_MAP(CCaptureDlg) no_(J>p^&  
 ON_WM_SYSCOMMAND() #Fx$x#Gc@y  
 ON_WM_PAINT() v`i9LD0(  
 ON_WM_QUERYDRAGICON() :]&O  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) KtWn08D!  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) 5(F @KeH>  
 ON_BN_CLICKED(ID_CHANGE, OnChange) e$krA!zN  
//}}AFX_MSG_MAP 8sm8L\-  
END_MESSAGE_MAP() 8 /3`rEW  
;[ UGEi  
BOOL CCaptureDlg::OnInitDialog() pJ*x[y  
{ }[a  
 CDialog::OnInitDialog();  c=? =u  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); saMv.;s 1^  
 ASSERT(IDM_ABOUTBOX < 0xF000); `Oxo@G*@}W  
 CMenu* pSysMenu = GetSystemMenu(FALSE); rSGp]W|  
 if (pSysMenu != NULL) s?h=%; T[  
 { ~/0 t<^  
  CString strAboutMenu; IBYRuaEB  
  strAboutMenu.LoadString(IDS_ABOUTBOX); (7 i@ @  
  if (!strAboutMenu.IsEmpty()) ,'~8{,h5  
  { $GI2rzh  
   pSysMenu->AppendMenu(MF_SEPARATOR); NY.Y=CF("  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); 7aAT  
  } R7xKVS_MP  
 } @I{v  
 SetIcon(m_hIcon, TRUE); // Set big icon _=ani9E]uF  
 SetIcon(m_hIcon, FALSE); // Set small icon 6wk/IJ`  
 m_Key.SetCurSel(0); pF~[  
 RegisterHotkey(); *` }Rt  
 CMenu* pMenu=GetSystemMenu(FALSE); I7!+~uX  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); /Yk4%ZJ{  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); US<bM@[  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); p BU,"Yy&  
 return TRUE; // return TRUE unless you set the focus to a control b(<#n6a}\  
} q}vz]L&o  
[~cb&6|M  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) 1\G S"4~P  
{ e C\;n  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) di^E8egR$  
 { j. 1@{H  
  CAboutDlg dlgAbout; ` drds  
  dlgAbout.DoModal(); p$r=jF&  
 } -[\+~aDH,  
 else DIx!Sw7EC  
 { i"eUacBz/-  
  CDialog::OnSysCommand(nID, lParam); Y*!J +A#  
 } j<+Q Gd%  
} {9(#X]'  
F' eV%g  
void CCaptureDlg::OnPaint() 1=fP68n  
{ W( O)J$j  
 if (IsIconic()) M<'AM4  
 { yb)!jLnH  
  CPaintDC dc(this); // device context for painting Ja$Ple*XU8  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); )n8(U%q$  
  // Center icon in client rectangle //9M~qHa"  
  int cxIcon = GetSystemMetrics(SM_CXICON); M'Ec:p=X"  
  int cyIcon = GetSystemMetrics(SM_CYICON); d@o1< Q  
  CRect rect; `~${fs{-`/  
  GetClientRect(&rect); /yRP>CX~  
  int x = (rect.Width() - cxIcon + 1) / 2; _T,X z_  
  int y = (rect.Height() - cyIcon + 1) / 2; udCum4  
  // Draw the icon P.G`ED|K!Y  
  dc.DrawIcon(x, y, m_hIcon); ,Mt/*^|  
 } ~zEBJgeyh  
 else x8L$T (^  
 { LQy`,-&  
  CDialog::OnPaint(); s*A#;  
 } rnB-e?>  
} DEmU},<S  
<B,z)c  
HCURSOR CCaptureDlg::OnQueryDragIcon() p[kEFE,%  
{ nP9zTa  
 return (HCURSOR) m_hIcon; ,MH9e!  
} 9 U6cM-p?  
1+P&O4>  
void CCaptureDlg::OnCancel() 9~AAdD  
{ P2lDi!q|  
 if(bTray) Yo`#G-]  
  DeleteIcon(); lLq9)+HGN  
  CDialog::OnCancel(); ^zdZ"\x  
} Z_Tu* F  
gQXB=ywF  
void CCaptureDlg::OnAbout() #=>t6B4af  
{ XYeuYLut  
 CAboutDlg dlg; $JH_  
 dlg.DoModal(); ~Q  q0  
} *{}Y :  
xW`,@a }  
void CCaptureDlg::OnBrowse() Tnw0S8M  
{ Xi^#F;@sU  
 CString str; y]dA<d?u  
 BROWSEINFO bi; lRIS&9vA3  
 char name[MAX_PATH]; 6rBXC <Z  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); #;l~Y}7'  
 bi.hwndOwner=GetSafeHwnd(); 9d4Agj M  
 bi.pszDisplayName=name; 0~.OMG:=  
 bi.lpszTitle="Select folder"; x  RV@ _  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; }Xn5M&>?  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); @@&([f  
 if(idl==NULL) n\ l$R!zr  
  return; C7|z DJ_  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); EX]LH({?+L  
 str.ReleaseBuffer(); 5~AK+6Za  
 m_Path=str; r-Nv<oH;  
 if(str.GetAt(str.GetLength()-1)!='\\') JqX+vRY;dd  
  m_Path+="\\"; XeGtge/}T  
 UpdateData(FALSE); })zYo 7  
} lwY2zX&%)/  
t-, =sV  
void CCaptureDlg::SaveBmp() }3{ x G+,  
{ )FF3|dZ";K  
 CDC dc; J Iw=Bs  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); ,U-aZ  
 CBitmap bm; ;cye 'E  
 int Width=GetSystemMetrics(SM_CXSCREEN); v61'fQ1Qg!  
 int Height=GetSystemMetrics(SM_CYSCREEN); q6xm#Fd'.  
 bm.CreateCompatibleBitmap(&dc,Width,Height); 3_AVJv ;N  
 CDC tdc; !N, Oe<  
 tdc.CreateCompatibleDC(&dc); hB]\vA7  
 CBitmap*pOld=tdc.SelectObject(&bm); znNJ?  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); *G]zN"Y  
 tdc.SelectObject(pOld); I2U/ \  
 BITMAP btm; ^#^\@jLm  
 bm.GetBitmap(&btm); 6k|^Cs6~z  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; +\@) 1  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); m[k@\xS4e  
 BITMAPINFOHEADER bih; =wd=TX/  
 bih.biBitCount=btm.bmBitsPixel; $)V_oQSqn  
 bih.biClrImportant=0; (T0%oina  
 bih.biClrUsed=0; bZf18lvij:  
 bih.biCompression=0; rKK{*%n  
 bih.biHeight=btm.bmHeight; UK{6Rh ;  
 bih.biPlanes=1; !|SVRaS  
 bih.biSize=sizeof(BITMAPINFOHEADER); nhbCk6Y5LZ  
 bih.biSizeImage=size; WyO7,Qr\   
 bih.biWidth=btm.bmWidth; a{oG[e   
 bih.biXPelsPerMeter=0; 38I.1p9  
 bih.biYPelsPerMeter=0; 9_~[  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); Xup"gYTZQ  
 static int filecount=0; "r:i  
 CString name; D^R=  
 name.Format("pict%04d.bmp",filecount++); u{Z 4M3U  
 name=m_Path+name; +lK?)77f  
 BITMAPFILEHEADER bfh; G4VdJ(_  
 bfh.bfReserved1=bfh.bfReserved2=0; :n@j"-HA  
 bfh.bfType=((WORD)('M'<< 8)|'B'); 9KqN .  
 bfh.bfSize=54+size; C(RZ09,.S  
 bfh.bfOffBits=54; '+@q  
 CFile bf; gj\'1(Ju  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ ]Wn^m+  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); n!nXM  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); k7R8Q~4  
  bf.WriteHuge(lpData,size); 9:JFG{M  
  bf.Close(); S 54N  
  nCount++; 2;82*0Y%  
 } yu<'-)T.?  
 GlobalFreePtr(lpData); I04GQql  
 if(nCount==1) 4| 6<nk_  
  m_Number.Format("%d picture captured.",nCount); 1c$<z~  
 else UJ}Xa&*H\  
  m_Number.Format("%d pictures captured.",nCount); ZQ&A '(tt4  
  UpdateData(FALSE); %syFHUBw  
} G`a,(<kT;  
9;fyC =  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) 7W{xK'|]  
{ 3 &aBU [  
 if(pMsg -> message == WM_KEYDOWN) /b$0).fj@,  
 { fmDn1N-bG  
  if(pMsg -> wParam == VK_ESCAPE) 2l7Sbs7  
   return TRUE; /b44;U`v5-  
  if(pMsg -> wParam == VK_RETURN) hI&ugdf  
   return TRUE; Z~JX@s0v  
 } 3)? v  
 return CDialog::PreTranslateMessage(pMsg); *{ =5AW}o  
} 2 /rDi  
$p(,Qz(.8  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) FuA8vTV{  
{ y([""z3<w  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ %Ydzzr3  
  SaveBmp(); p1-bq:  
  return FALSE;  AU3Ou5  
} $& 0hpg  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ c@+;4Iz  
 CMenu pop; zF%'~S0{  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); Ql%0%naq1  
 CMenu*pMenu=pop.GetSubMenu(0); h{$mL#J  
 pMenu->SetDefaultItem(ID_EXITICON); Vy+%sG q"  
 CPoint pt; 4 ^=qc99  
 GetCursorPos(&pt); "agc*o~!F  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); [f_4%Now  
 if(id==ID_EXITICON) rh8.kW-K_  
  DeleteIcon(); Bi!j re  
 else if(id==ID_EXIT) jK!Y-  
  OnCancel(); #P)7b,3pe  
 return FALSE; gwf *M3(  
} 1X5*V!u  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); l> Mth+ ,b  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) (Wj2%*NT  
 AddIcon(); kLr6j-X  
 return res; Q%seV<!/  
} nJdO~0}3  
gypE~@  
void CCaptureDlg::AddIcon() >N&C-6W  
{ #Cwzk{p(  
 NOTIFYICONDATA data; <`'^rCWI?  
 data.cbSize=sizeof(NOTIFYICONDATA); &#AK#`&)0i  
 CString tip; .7BB*!CP  
 tip.LoadString(IDS_ICONTIP); [P,/J$v^~  
 data.hIcon=GetIcon(0); %LL*V|  
 data.hWnd=GetSafeHwnd(); ylV.ZoY6  
 strcpy(data.szTip,tip); O_f+#K)  
 data.uCallbackMessage=IDM_SHELL; oX2J2O  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; FY^#%0~  
 data.uID=98; Kb<^Wdy4T  
 Shell_NotifyIcon(NIM_ADD,&data); ~#doJ:^H3  
 ShowWindow(SW_HIDE); -y@5% _-  
 bTray=TRUE; #^\q Fj  
} Ws+Zmpk%  
SS4'yaQ  
void CCaptureDlg::DeleteIcon() v}$s,j3NO  
{ nDdF(|Qt  
 NOTIFYICONDATA data; [lSQ?  
 data.cbSize=sizeof(NOTIFYICONDATA); Uf:G,%OYi  
 data.hWnd=GetSafeHwnd(); V4('}Q!  
 data.uID=98; + lha=  
 Shell_NotifyIcon(NIM_DELETE,&data); % d%KH9u  
 ShowWindow(SW_SHOW); 7c:5 Ey  
 SetForegroundWindow(); jq4'=L$4  
 ShowWindow(SW_SHOWNORMAL); 4z~%gt74O]  
 bTray=FALSE; &HPzm6.3  
} 33R_JM{  
/,>@+^1  
void CCaptureDlg::OnChange() ~-"<)XPe  
{  >%~E <  
 RegisterHotkey(); =,*4:TU  
} }]qx "  
5`ma#_zk|f  
BOOL CCaptureDlg::RegisterHotkey() x J;DkPh  
{ d/Sx+1 "{T  
 UpdateData(); W|go*+`W%  
 UCHAR mask=0; GM5s~,  
 UCHAR key=0; ZQd\!K8y^Q  
 if(m_bControl) Yj^| j  
  mask|=4; Rwy<#9R[x  
 if(m_bAlt) UE3#(:x A  
  mask|=2; Dn[iA~  
 if(m_bShift) F-^#EkEGe  
  mask|=1; b&Dc DX  
  key=Key_Table[m_Key.GetCurSel()]; jY]hMQ/H  
 if(bRegistered){ uq}>5  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); oEqt7l[I{  
  bRegistered=FALSE; [5v[Zqud  
 } VW7 ?{EL7  
 cMask=mask; )/'y'd<r  
 cKey=key; C,+ Sv-  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); 1I#S?RSb  
 return bRegistered; 7qyv.{+  
} _;A?w8z  
YWf w%p?n"  
  四、小结 7VP[U,  
]"Do%<  
  本实例通过一个钩子DLL实现了屏幕抓图的功能,它有一个缺陷,那就是只能保存整个屏幕图像,不过读者朋友可以在此基础上,实现屏幕任意区域的抓图功能,具体方法不再赘述,实现起来很容易的了,呵呵。
评价一下你浏览此帖子的感受

精彩

感动

搞笑

开心

愤怒

无聊

灌水
描述
快速回复

您目前还是游客,请 登录注册
批量上传需要先选择文件,再选择上传
认证码:
验证问题:
3+5=?,请输入中文答案:八 正确答案:八