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
  • 7374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: o |$D|E  
  w OL,LU  
  一、实现方法 q'D Ts9Bj  
`[ZswLE  
  热键管理DLL实际上是一个键盘钩子,由它来监视系统的键盘事件。如果有和程序登记符合的按键组合就通知该程序的窗口。为了应用方便,本实例把它做成了一个标准的管理库来为其它的程序通过热键服务,它有两个输出函数:AddHotkey()和DeleteHotkey(),程序只需要调用这两个函数就可以了,如果编译之后不用改变热键,则只需要AddHotkey就可以了。DLL中的所有的全局变量都放在一个共享段中,定义如下: J}|X  
\C~X_/sg  
#pragma data_seg("shareddata") )g5?5f;  
HHOOK hHook =NULL; //钩子句柄 F)3+IuY  
UINT nHookCount =0; //挂接的程序数目 lyn%r  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 TrI+F+;  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 R'BB-  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey ]jT}]9Q$  
static int KeyCount =0; fQ+whGB  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 $4bc!  
#pragma data_seg() Hv6h7-  
) f?I{  
  关于共享段,有几点重要的说明:一是必须在链接选项里指定该段为共享:一种方法是在project->settings->link->object/library中加上/section:shareddata,rws;第二种方法是在def文件的sections里加上一句shareddata read write shared;第三种指定共享段的方法在程序里加上一句#pragma comment(linker,"section:shareddata,rws")。二是所有的变量必须初始化,否则链接程序会把它放到普通数据段。三是如果不初始化变量,需要在段外用"__declspec(allocate("shareddata")) 变量类型 变量名"的方式定义。 !gh8 Qs  
r$jWjb  
  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: R%r bysP  
ZmK=8iN9J  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR 'g#%>  
cKey,UCHAR cMask) )~2\4t4|g  
{ \J LGw1F  
 BOOL bAdded=FALSE; Bdo{zv&A  
 for(int index=0;index<MAX_KEY;index++){ y r (g/0  
  if(hCallWnd[index]==0){ y oW ~  
   hCallWnd[index]=hWnd; v,4{:y]p  
   HotKey[index]=cKey; +C~h(  
   HotKeyMask[index]=cMask; >Kgw2,y+  
   bAdded=TRUE; q,v<:sS9T  
   KeyCount++; QM,#:m1o  
   break; {}$9 70y  
  } :Cq73:1\B  
 } NuZ2,<~9  
 return bAdded; Dfs^W{YA  
} =VC18yA  
//删除热键 z/t|'8f  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) :{u`qi  
{ +pd,gG?dW  
 BOOL bRemoved=FALSE; WJ{Iv] }9  
 for(int index=0;index<MAX_KEY;index++){ 3W1Lh~Av  
  if(hCallWnd[index]==hWnd){ fCt|8,-H  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ NcA `E_3  
    hCallWnd[index]=NULL; C% -Tw]T$_  
    HotKey[index]=0; @3`5(xwzm  
    HotKeyMask[index]=0; =rKJJa N  
    bRemoved=TRUE; b.*LmSX#  
    KeyCount--; c^}G=Z1@  
    break; .*zN@y3  
   } ^O|fw?,  
  } y2W+YV*  
 } 0E.N3iU  
 return bRemoved; 0C4eer+D  
} i/:L^SQAq  
R"ON5,E  
U[C>Aoze  
  DLL中的钩子函数如下: WD5J2EePT  
7F<{ Qn  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) G ;j1zs  
{ @*%3+9`yq  
 BOOL bProcessed=FALSE; ? AfThJc  
 if(HC_ACTION==nCode) Po?MTA  
 { N+&uR!:.C  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 n;Bb/Z!~  
   switch(wParam) Q68~D.V%r  
   {  L0w6K0J4  
    case VK_MENU: 1UP {j`-K|  
     MaskBits&=~ALTBIT; FJ_JaIby  
     break; B=A!hXNa  
    case VK_CONTROL: St5;X&Q  
     MaskBits&=~CTRLBIT; wFMH\a  
     break; ERPg TZT  
    case VK_SHIFT: pg{VKrT`  
     MaskBits&=~SHIFTBIT; F ~A $7  
     break; Jg#0g eU  
    default: //judge the key and send message TV{GHB!p"  
     break; BTAbDyH5  
   } h)Y] L#R  
   for(int index=0;index<MAX_KEY;index++){  3IxC@QR  
    if(hCallWnd[index]==NULL) t/|0"\ p  
     continue; |[],z 8  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) t/ \S9  
    { WI\a  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); @i ~A7L0/  
     bProcessed=TRUE; +4yre^gC  
    } ~ z^?+MgZ2  
   } .x I Aep_  
  } nJI2IPZ  
  else if((lParam&0xc000ffff)==1){ //有键按下 Y0(4]X \ey  
   switch(wParam) 1!uBzO6/$  
   { ('x]@  
    case VK_MENU: s|%R  
     MaskBits|=ALTBIT; x3n9|Uud  
     break; Fz#@[1,  
    case VK_CONTROL: >zJHvb)b\  
     MaskBits|=CTRLBIT; OIK x:&uIk  
     break; r+#{\~r7T  
    case VK_SHIFT: x2v0cR"KL  
     MaskBits|=SHIFTBIT; y[N0P0r l:  
     break; $;5Q mKQ'  
    default: //judge the key and send message tW/k  
     break; |r~u7U\  
   } V$ZclV2:Ih  
   for(int index=0;index<MAX_KEY;index++){ |_?e.}K  
    if(hCallWnd[index]==NULL) >XtfT'  
     continue; 5 `1  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) gnJ8tuS  
    { a0NiVF-m%  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); jG>W+lq  
     bProcessed=TRUE; Zn9tG:V  
    } 8-#kY}d.  
   } 3ijPm<wn  
  } SKC;@?  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 DS?.'"n[u  
   for(int index=0;index<MAX_KEY;index++){ Pn!~U] A$%  
    if(hCallWnd[index]==NULL) :#:|:q.]  
     continue; MpOU>\  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) hs7!S+[.$$  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); N sdpE?V  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 g8O6 b  
   } @43psq1  
  } <,CrE5Pl  
 } N3"JouP  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); <0d2{RQ;  
}  G*z\ ^H  
'K4FS(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: J>(X0@eWz  
TuQGF$n@  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); xM%4/QE+  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); h0<PQZJ  
ROFZ*@CH<  
  为了添加应用程序对热键通知事件的响应,程序中用的办法是重载WindowProc()函数,该函数代码如下: xhP~]akHN7  
ZiUb+;JA  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) 9FDu{4:  
{ vRe{B7}p;  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) ;<Q%d~$xy}  
 { ~N!HxQ  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 k6CXuU  
  SaveBmp(); ;VE y{%nF  
  return FALSE; m* m),mZ"  
 } >Y>R1b%  
 …… //其它处理及默认处理 811>dVq3/  
} #gbB// <  
2.3_FXSt  
`XxnQng  
  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。 &_L%wV|[  
l~E~!MR  
  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。 X,Na4~JO(  
e!5} #6Kd  
  二、编程步骤 BwT[SI<Sg  
7}&:07U  
  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"; _:Qh1 &h  
krfXvQJwJ  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; F` ybe\  
xFF!)k #  
  3、 在"Capture"项目中按照图一所示设置对话框的界面,具体设置参见代码部分; v@zi?D K  
Gd!-fqNa'x  
  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; ? Ek)" l  
D [+LU(  
  5、 添加代码,编译运行程序。 hC2Fup1@  
)9H5'Wh#  
三、程序代码 O|H:  
&vrQ *jX  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL s70Z&3A  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) wsmgkg  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ D;+/ bll7  
#if _MSC_VER > 1000 IQJ"B6U)  
#pragma once [NSslVr  
#endif // _MSC_VER > 1000 ]LB_ @#  
#ifndef __AFXWIN_H__ Z8E<^<|  
#error include 'stdafx.h' before including this file for PCH ~kZdep^]  
#endif G[KjK$.Ts?  
#include "resource.h" // main symbols *?<N3Rr*  
class CHookApp : public CWinApp x^K4&'</  
{ "'CvB0>   
 public: z>PVv)X  
  CHookApp(); \\SQACN  
  // Overrides 1gHe$ dzXk  
  // ClassWizard generated virtual function overrides yV.p=8:  
  //{{AFX_VIRTUAL(CHookApp) ]c>@RXY'  
 public: d<-f:}^k0  
  virtual BOOL InitInstance(); D;YfQQr  
  virtual int ExitInstance(); P}4&J ^  
  //}}AFX_VIRTUAL pX%:XpC!h  
  //{{AFX_MSG(CHookApp) n%3!)/$  
  // NOTE - the ClassWizard will add and remove member functions here. | In{5E k  
  // DO NOT EDIT what you see in these blocks of generated code ! 7i($/mNl  
  //}}AFX_MSG _*~F1% d  
  DECLARE_MESSAGE_MAP() G!j9D  
}; `4*I1WZW  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); :UdW4N-  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); _=$~l^Y[  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); S# ]] h/  
BOOL InitHotkey(); Xz4q^XJ  
BOOL UnInit(); 8Qg{@#Wr  
#endif .{ v$;g  
SXw r$)4_  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. k3bQ32()  
#include "stdafx.h" 6!_Wo\ _%  
#include "hook.h" SrKitSG  
#include <windowsx.h> uq3pk3 )W9  
#ifdef _DEBUG 8C{&i5kj\E  
#define new DEBUG_NEW 5qrD~D '  
#undef THIS_FILE RQ E]=N  
static char THIS_FILE[] = __FILE__; q=t!COS  
#endif d7^ `  
#define MAX_KEY 100 Pk;w.)kT  
#define CTRLBIT 0x04 c+l1 l0BA  
#define ALTBIT 0x02 ]+:yfDtZd  
#define SHIFTBIT 0x01 F>\,`wP  
#pragma data_seg("shareddata") StJb-K/_cL  
HHOOK hHook =NULL; 6Rfv3  
UINT nHookCount =0; /[TOy2/;%b  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey ?J2{6,}O*.  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT a*(Zb|g  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey 44e]sT.B  
static int KeyCount =0; |*?N#0s5h  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift k1,k 9BK  
#pragma data_seg() e]1=&:eX#d  
HINSTANCE hins; C@Wzg  
void VerifyWindow(); GXZ="3W |  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) *z[vp2 TN  
//{{AFX_MSG_MAP(CHookApp) 0se%|Z|8  
// NOTE - the ClassWizard will add and remove mapping macros here. +c_AAMe  
// DO NOT EDIT what you see in these blocks of generated code! )>M L7y  
//}}AFX_MSG_MAP Vs 5 &X+k  
END_MESSAGE_MAP() <lB2Nv-,  
]L~z9)  
CHookApp::CHookApp() )#AYb   
{ $+PioSq  
 // TODO: add construction code here, 9we];RYK  
 // Place all significant initialization in InitInstance D:9^^uVp  
} XI`_PQco  
#m|el@)  
CHookApp theApp; !po,Z&  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) ZTTA??}Y  
{ bpsyO>lx/  
 BOOL bProcessed=FALSE; n`= S&oKH  
 if(HC_ACTION==nCode) b!g)/%C  
 { rv[BL.qV  
  if((lParam&0xc0000000)==0xc0000000){// Key up NATi)A"TZ  
   switch(wParam) ?e-rwaW  
   { Y<;C>Rs  
    case VK_MENU: !$HuH6_[  
     MaskBits&=~ALTBIT; &K]|{1+  
     break; 6No.2Oo  
    case VK_CONTROL: ;s3@(OnjZ  
     MaskBits&=~CTRLBIT; fyUW;dj  
     break; gS(JgN  
    case VK_SHIFT: TJP;!uX  
     MaskBits&=~SHIFTBIT; 'tTlBf7#  
     break; Db2#QQ  
    default: //judge the key and send message ?Ho$fGz  
     break; p3fV w]N  
   } >]}VD "\  
   for(int index=0;index<MAX_KEY;index++){ RCqL~7C+ k  
    if(hCallWnd[index]==NULL) TPb&";4ROf  
     continue; a?Om;-i2`S  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) ip'v<%,Q3"  
    { -T+yS BO_3  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); [ 2@Lc3<  
     bProcessed=TRUE; E2 'Al6^C  
    } Ew}GPJ  
   } H?opG<R=ek  
  } fx 08>r   
  else if((lParam&0xc000ffff)==1){ //Key down w 8o?wx*  
   switch(wParam) I-.? qcy~  
   { gu3)HCZ  
    case VK_MENU: .aZB?M W  
     MaskBits|=ALTBIT; >ptI!\i}  
     break; fo}@B &=4  
    case VK_CONTROL: N0fE*xo  
     MaskBits|=CTRLBIT; 'PMzm/;8st  
     break; k'$7RjCu  
    case VK_SHIFT: nb5%a   
     MaskBits|=SHIFTBIT; D622:Y886  
     break; M]\"]H?  
    default: //judge the key and send message L%9yFg%u  
     break; |q o3 E  
   } dkEnc  
   for(int index=0;index<MAX_KEY;index++) Zfu" 8fX  
   { !oV'  
    if(hCallWnd[index]==NULL) /9y'UKl7[  
     continue; :+DAzjwO<  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) [0+5 Gx  
    { u*;53 43  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); F7x< V=4{  
     bProcessed=TRUE; ]*S_fme  
    } -JF|770i  
   } MD:kfPQ  
  } WY~}sE  
  if(!bProcessed){ ;rta#pRn  
   for(int index=0;index<MAX_KEY;index++){ zGFW?|o<  
    if(hCallWnd[index]==NULL) ?yz}  
     continue; nuv$B >  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) EZiGi[t7  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); >BQF<  
   } ]O&A:Us  
  } =09j1:''<d  
 } *DoEDw  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); ~h[lu^ZSi  
} {_MU0=7c\  
'*p-`  
BOOL InitHotkey() J>Rt2K  
{ =Jl1D*B*  
 if(hHook!=NULL){ Pq7tNM E  
  nHookCount++; TAJ9Y<  
  return TRUE; Y=rW.yK8  
 } Js#c9l{{  
 else zZh`go02E  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); M!6bf  
  if(hHook!=NULL) TbU9 < mY  
   nHookCount++; |V~P6o(/  
  return (hHook!=NULL); *&2#;mf3  
} qV$',U*+T  
BOOL UnInit() <db/. A3  
{ t_VHw'~"  
 if(nHookCount>1){ :* /``  
  nHookCount--; C1rCKKh  
  return TRUE; :~)Q]G1Nj  
 } $v oyXi`*  
 BOOL unhooked = UnhookWindowsHookEx(hHook); +#H8d1^5  
 if(unhooked==TRUE){ izW l5}+'B  
  nHookCount=0; 3S2'JOTY  
  hHook=NULL; i+cGw  
 } +[ }]a3)  
 return unhooked; /~tfP  
} 6k3l/~R  
;<X3AhF  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) '}YXpB  
{ K :q-[\G  
 BOOL bAdded=FALSE; 2RXGY  
 for(int index=0;index<MAX_KEY;index++){ K((Kd&E  
  if(hCallWnd[index]==0){ quUJ%F  
   hCallWnd[index]=hWnd; z=Vvb  
   HotKey[index]=cKey; ;^8^L'7cr  
   HotKeyMask[index]=cMask; &% r#eB?7  
   bAdded=TRUE; 22r01qH  
   KeyCount++; O}f(h5!k  
   break; @ Q1jH~t  
  } jh0$:6 `C  
 } nG*6ic  
 return bAdded; ~D=@4(f8|  
} dO//  
yEqmB4^-  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) yaR;  
{ f}'gg  
 BOOL bRemoved=FALSE; }Voh5*$E`  
 for(int index=0;index<MAX_KEY;index++){ <d5vVn  
  if(hCallWnd[index]==hWnd){ I !<v$  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ Qy/bzO  
    hCallWnd[index]=NULL; c_a$g  
    HotKey[index]=0; +l/j6)O`(m  
    HotKeyMask[index]=0; S'JeA>L  
    bRemoved=TRUE; KE&}*Nf[  
    KeyCount--; d$,i?d,  
    break; C;) xjZiR  
   } :{ T#M$T  
  } 3ElpS^ 2W  
 } l=]vC +mU  
 return bRemoved; XZ&v3ul  
} Yr=mLT|JN  
1;gSf.naG  
void VerifyWindow() 2!otVz! Mh  
{ ">QY'r  
 for(int i=0;i<MAX_KEY;i++){ bgK(l d`  
  if(hCallWnd!=NULL){ rpT<cCem1  
   if(!IsWindow(hCallWnd)){ N]<gHGj}  
    hCallWnd=NULL; XfrnM^oty  
    HotKey=0; _dBU6U:V  
    HotKeyMask=0; h*9o_  
    KeyCount--; l.W:6", w  
   } dJ^`9W  
  } G0Eq }MyF  
 } /a|NGh%  
} [;f"',)y,  
w;$+7  
BOOL CHookApp::InitInstance() {|E7N"Qzg  
{ ,h._iO)I^  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); p,8Z{mLn  
 hins=AfxGetInstanceHandle(); bN&da [K  
 InitHotkey(); ,s76]$%4  
 return CWinApp::InitInstance(); Q8q_w2s,  
} Pvw%,=41O  
w$ {  
int CHookApp::ExitInstance() 7dJaWD:&   
{ B~#@fIL  
 VerifyWindow(); y)E2=JQA/  
 UnInit(); ):@%xoF5  
 return CWinApp::ExitInstance(); :GYv9OG  
} R4(8]oUW  
/6c10}f  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file lp UtNy  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) P.B'Gh#^  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ ]c2| m}I{:  
#if _MSC_VER > 1000 OJ 5 !+#>  
#pragma once mD)O\.uA  
#endif // _MSC_VER > 1000 ix+x-G  
q_&IZ,{Vk  
class CCaptureDlg : public CDialog *~uuCLv_  
{ { bn#:75r  
 // Construction !?*!"S-Sl  
 public: Y%l3SB,5L  
  BOOL bTray; ~Wm}M  
  BOOL bRegistered; :a@z53X@M  
  BOOL RegisterHotkey(); $SVGpEw  
  UCHAR cKey; )+,jal^7  
  UCHAR cMask; 9`{2h$U  
  void DeleteIcon(); Rk[ * p  
  void AddIcon(); ItPK  
  UINT nCount; CM1a<bV<  
  void SaveBmp(); *KH@u  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor eBIR *TZ):  
  // Dialog Data "%t`I)  
  //{{AFX_DATA(CCaptureDlg) r_E)HL/A  
  enum { IDD = IDD_CAPTURE_DIALOG }; U.'@S8  
  CComboBox m_Key; n;`L5  
  BOOL m_bControl; 5z ^UQ q  
  BOOL m_bAlt; 9%14k  
  BOOL m_bShift; E0]h|/A]  
  CString m_Path; 34kd|!e,  
  CString m_Number; l|em E ^  
  //}}AFX_DATA \q'fB?bS^  
  // ClassWizard generated virtual function overrides )N 6[rw<  
  //{{AFX_VIRTUAL(CCaptureDlg) a&"*UJk<?  
 public: H`lD@q'S  
  virtual BOOL PreTranslateMessage(MSG* pMsg); "@w%TcA  
 protected: oD@jtd>b%  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support rI+w1';C1  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); ?(8%SPRk  
  //}}AFX_VIRTUAL y?#J`o- O  
  // Implementation B!ibE<7,  
 protected: (x0*(*A}  
  HICON m_hIcon; lkg*AAR?'  
  // Generated message map functions Z[S+L"0  
  //{{AFX_MSG(CCaptureDlg) hyfnIb@~}  
  virtual BOOL OnInitDialog(); PZRn6Tc  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); 8 {]Gh 0+  
  afx_msg void OnPaint(); *;E+9^:V  
  afx_msg HCURSOR OnQueryDragIcon(); {b0&qV   
  virtual void OnCancel(); }k0-?_Z=1  
  afx_msg void OnAbout(); "ak9LZQ9z  
  afx_msg void OnBrowse(); /JubiLEK  
  afx_msg void OnChange(); :;;WK~* #  
 //}}AFX_MSG 6oh@$.ThG  
 DECLARE_MESSAGE_MAP() m<"fRT!Y  
}; RLOQ>vYY  
#endif -Dxhq& }Y  
I''R\B p  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file A{x 7  
#include "stdafx.h" >04>rn#},,  
#include "Capture.h" *3`oU\r  
#include "CaptureDlg.h" bH&)rn  
#include <windowsx.h> bTQa'y`3  
#pragma comment(lib,"hook.lib") g+ 1=5g  
#ifdef _DEBUG /:{_|P\  
#define new DEBUG_NEW D>b5Uwt  
#undef THIS_FILE <-B"|u  
static char THIS_FILE[] = __FILE__; ]Bd3d%  
#endif |EV\a[  
#define IDM_SHELL WM_USER+1 !FO^:V<|5  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); #lshN,CPm  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); 6mpg&'>  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; pNE\@U|4E  
class CAboutDlg : public CDialog @ PoFxv  
{ fCf#zV[  
 public: K}E7|gdG  
  CAboutDlg(); h<' 5q&y  
  // Dialog Data Oqpl2Y"/  
  //{{AFX_DATA(CAboutDlg) A9l})_~i  
  enum { IDD = IDD_ABOUTBOX }; {_XrZ(y/  
  //}}AFX_DATA dEd]U49u  
  // ClassWizard generated virtual function overrides k3>ur>aW  
  //{{AFX_VIRTUAL(CAboutDlg) $W {yK+N  
 protected: ,mjfZ*N  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support gr`Ar;  
  //}}AFX_VIRTUAL Z\=04[  
  // Implementation j H.Ju|nO  
 protected: jXY;V3l  
  //{{AFX_MSG(CAboutDlg) SAG` ^t  
  //}}AFX_MSG K+@eH#Cv,(  
  DECLARE_MESSAGE_MAP() PL9eUy  
}; >[H&k8\7n  
n^pZXb;Y  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) u2-@?yt  
{ nz(q)"A  
 //{{AFX_DATA_INIT(CAboutDlg) me:|!lI7YU  
 //}}AFX_DATA_INIT &xBK\  
} Fb|e]?w  
:x""E5H  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) x #tu  
{ V(2j*2R!  
 CDialog::DoDataExchange(pDX); _@/C~  
 //{{AFX_DATA_MAP(CAboutDlg) _h1 HuL  
 //}}AFX_DATA_MAP MO~~=]Y'  
} ..]*Ao2  
RJRq` T|m  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) ?#*  
 //{{AFX_MSG_MAP(CAboutDlg) {;iH Yr-zs  
 // No message handlers /}nrF4S  
 //}}AFX_MSG_MAP _D>as\dP  
END_MESSAGE_MAP() 88#qu.  
hk@`N;dn  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) ?H[5O+P[  
: CDialog(CCaptureDlg::IDD, pParent) 8{G?92 {rN  
{  t$H':l0  
 //{{AFX_DATA_INIT(CCaptureDlg) pdi=6<?bd  
  m_bControl = FALSE; 6/[Z178m  
  m_bAlt = FALSE; ^5;vx  
  m_bShift = FALSE; )ew[ Ak|  
  m_Path = _T("c:\\"); ?{"XrQw  
  m_Number = _T("0 picture captured."); VqD[G<|9T  
  nCount=0; P^8^1-b  
  bRegistered=FALSE; X%a;i6pq  
  bTray=FALSE; b$?Xn{Y  
 //}}AFX_DATA_INIT .lvI8Jf~X  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 b$v[@"1  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); rmPne8D=c(  
} lk[G;=K:.  
~IlF*Zz#}6  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) oI_oz0nHk  
{ -v;n"Zy1  
 CDialog::DoDataExchange(pDX); F<yy>Wf  
 //{{AFX_DATA_MAP(CCaptureDlg) q}<.x8\  
  DDX_Control(pDX, IDC_KEY, m_Key); 1iNsX\M  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); *|LbbRu  
  DDX_Check(pDX, IDC_ALT, m_bAlt); E[jXUOu-  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); Q(IJD4  
  DDX_Text(pDX, IDC_PATH, m_Path); R%b*EBZ  
  DDX_Text(pDX, IDC_NUMBER, m_Number); (!ZQ  
 //}}AFX_DATA_MAP 1KTabj/C  
} |jahpji6  
!Tn0M;  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) qnq%mwDeD  
//{{AFX_MSG_MAP(CCaptureDlg) mW~i c  
 ON_WM_SYSCOMMAND() y@o9~?M  
 ON_WM_PAINT() QFW0KD`5  
 ON_WM_QUERYDRAGICON() w0Fwd  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) Yzj%{fkh  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) x?,~TC4  
 ON_BN_CLICKED(ID_CHANGE, OnChange) G&x'=dJ  
//}}AFX_MSG_MAP p-5P as  
END_MESSAGE_MAP() 9W1;Kb|Z<  
G;(onJz  
BOOL CCaptureDlg::OnInitDialog() y$IaXr5L  
{ (O8,zqP9l  
 CDialog::OnInitDialog(); L!;^ #g  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); 6P;o 6s  
 ASSERT(IDM_ABOUTBOX < 0xF000); M!N` Orz  
 CMenu* pSysMenu = GetSystemMenu(FALSE); 4 ,p#:!  
 if (pSysMenu != NULL) eM?rc55|  
 { t a&Q4v&-  
  CString strAboutMenu; 8To7c  
  strAboutMenu.LoadString(IDS_ABOUTBOX); &sm @  
  if (!strAboutMenu.IsEmpty()) owE<7TGPI?  
  { 29"mE;j  
   pSysMenu->AppendMenu(MF_SEPARATOR); EHpu*P~W  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); j\2] M  
  } 44|deE3Z  
 } 2?GXkPF2;A  
 SetIcon(m_hIcon, TRUE); // Set big icon bnijM/73  
 SetIcon(m_hIcon, FALSE); // Set small icon sS, zzx<  
 m_Key.SetCurSel(0); o"|O ]  
 RegisterHotkey(); `[WyH O|8  
 CMenu* pMenu=GetSystemMenu(FALSE); j#N(1}r=1  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); }*iAE>;  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); 89zuL18V  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); OuB2 x=B  
 return TRUE; // return TRUE unless you set the focus to a control QF\kPk(CtD  
} KHvIN}V5?3  
p1Q/g Il  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) MWM +hk1fs  
{ |]^l^e 6m  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) R=`U4Ml;  
 { 0/ut:RV0  
  CAboutDlg dlgAbout; SK's!m:r=  
  dlgAbout.DoModal(); ?E % +}P  
 } <u0*"  
 else 8)N0S% B  
 { G9\EZ\x!  
  CDialog::OnSysCommand(nID, lParam); '.pgXsC:=?  
 } D899gGe  
} 43KaL(  
+Dv7:x7  
void CCaptureDlg::OnPaint() !0`lu_ZN  
{ vx'l> @]k  
 if (IsIconic()) {3_Gjb5\\4  
 { }A-{6Qe  
  CPaintDC dc(this); // device context for painting f[x~)=  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); V {p*z  
  // Center icon in client rectangle $( S*GF$S  
  int cxIcon = GetSystemMetrics(SM_CXICON); .+OB!'dDK^  
  int cyIcon = GetSystemMetrics(SM_CYICON); eaEbH2J  
  CRect rect; W+KF2(lB  
  GetClientRect(&rect); +|6`E3j%  
  int x = (rect.Width() - cxIcon + 1) / 2; O{~KR/  
  int y = (rect.Height() - cyIcon + 1) / 2; Gc wt7~  
  // Draw the icon FtE90=$  
  dc.DrawIcon(x, y, m_hIcon); ^Sw2xT$p{j  
 } \H^;'agA  
 else veV_be{i  
 {  q$F)!&  
  CDialog::OnPaint(); (}G!np  
 } Ddb-@YD&+0  
} ?fV?|ZGZI  
v{r1E]rY  
HCURSOR CCaptureDlg::OnQueryDragIcon() iecWa:('  
{ /^Y[*5  
 return (HCURSOR) m_hIcon; GjEqU;XBi  
} G%;kGi`m  
IAYACmlN&  
void CCaptureDlg::OnCancel() 1t.R+1[c  
{ sa G8g  
 if(bTray) }"hW b(  
  DeleteIcon(); ] @ufV  
  CDialog::OnCancel(); 8yn4}`Nc@  
} 0 <g{ V  
E30Ln_^o  
void CCaptureDlg::OnAbout() $(3uOsy   
{ >Co)2d]  
 CAboutDlg dlg; m~;B:LN<  
 dlg.DoModal(); !~)90Z!  
} u\f3qc,]F  
B_hPcmB  
void CCaptureDlg::OnBrowse() iUTU*El>  
{ f~q4{  
 CString str; L"^OdpOs  
 BROWSEINFO bi; k=`$6(>Fz  
 char name[MAX_PATH]; "CBRPp  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); #BsW  
 bi.hwndOwner=GetSafeHwnd(); P].eAAXnP  
 bi.pszDisplayName=name; `kFiH*5%z  
 bi.lpszTitle="Select folder"; r_^)1w  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; Tpb"uBiXoo  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); E~qQai=]  
 if(idl==NULL) 4^[ /=J}  
  return; +p z}4M`  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); >OK#n)U`  
 str.ReleaseBuffer(); 3 <9{v  
 m_Path=str; ~g7m3  
 if(str.GetAt(str.GetLength()-1)!='\\') <[ZI.+_Wt  
  m_Path+="\\"; =G4u#t)  
 UpdateData(FALSE); OM)3Y6rK  
} V#L'7">VP  
zW5C1:.3K  
void CCaptureDlg::SaveBmp() b1xpz1  
{ &))\2pl  
 CDC dc; 0elxA8Z~e  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); wx*1*KZ  
 CBitmap bm; <!F3s`7~  
 int Width=GetSystemMetrics(SM_CXSCREEN); JaI Kjn  
 int Height=GetSystemMetrics(SM_CYSCREEN); _w>uI57U  
 bm.CreateCompatibleBitmap(&dc,Width,Height); V&%C\ns4  
 CDC tdc; a.q;_5\5`  
 tdc.CreateCompatibleDC(&dc); x#r<,uNn,  
 CBitmap*pOld=tdc.SelectObject(&bm); nR[^|CAR  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); rEM#D]k  
 tdc.SelectObject(pOld); at| \FOKj  
 BITMAP btm; t"|DWC*  
 bm.GetBitmap(&btm); -uj3'g (;w  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; ^s-25 6iI  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); JhP\u3 QE  
 BITMAPINFOHEADER bih; h&`y$Jj  
 bih.biBitCount=btm.bmBitsPixel; _~&9*D$ {>  
 bih.biClrImportant=0; DZk1ZLz  
 bih.biClrUsed=0; @^&7$#jq%  
 bih.biCompression=0; mlB~V3M'G  
 bih.biHeight=btm.bmHeight; moZm0` WR  
 bih.biPlanes=1; D"^'.DL@wG  
 bih.biSize=sizeof(BITMAPINFOHEADER); <*wM=aq  
 bih.biSizeImage=size; "}zt`3  
 bih.biWidth=btm.bmWidth; 9->q|E4  
 bih.biXPelsPerMeter=0; %j5ywr:  
 bih.biYPelsPerMeter=0;  to>  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); -ihiG_f  
 static int filecount=0; .T8K-<R  
 CString name; G\kpUdj}  
 name.Format("pict%04d.bmp",filecount++); 4MLH+/e  
 name=m_Path+name; Oaa"T8t  
 BITMAPFILEHEADER bfh; (%'9CfPx  
 bfh.bfReserved1=bfh.bfReserved2=0; .Y\EE;8%  
 bfh.bfType=((WORD)('M'<< 8)|'B'); Ee)xnY%(  
 bfh.bfSize=54+size; :o8MUXH$  
 bfh.bfOffBits=54; '!Wvqs  
 CFile bf; pO]8 dE0  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ j_GBH8 `  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); >;9NtoE  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); IZrk1fh  
  bf.WriteHuge(lpData,size); t,<UohL|z  
  bf.Close(); (>7>3  
  nCount++; >bIF>9T  
 } Y3rt5\!  
 GlobalFreePtr(lpData); 9 <\`nm  
 if(nCount==1) iKAusWj  
  m_Number.Format("%d picture captured.",nCount); 3i=Iu0  
 else |8U;m:AS  
  m_Number.Format("%d pictures captured.",nCount); B<,YPS8w  
  UpdateData(FALSE); Z h'&-c_J  
} d1G8*YO@  
H M:r0_  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) T1bd:mC}n  
{ kO_5|6  
 if(pMsg -> message == WM_KEYDOWN) L l}yJ#3,  
 { K 1W].(-@4  
  if(pMsg -> wParam == VK_ESCAPE) b1-&v|L  
   return TRUE; v&;:^jJ8  
  if(pMsg -> wParam == VK_RETURN) f~ U.a.Fb  
   return TRUE; s&Yi 6:J  
 } 8ObeiVXf)  
 return CDialog::PreTranslateMessage(pMsg);  f^b K=#  
} ^sClz*%?  
q>s`uFRg(  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) 2*1ft>Uty  
{ @dEiVF`4:  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ 75NRCXh.  
  SaveBmp(); AK@L32-S  
  return FALSE; ."6[:MF  
} J2M(1g)t9  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ r:g9Z_  
 CMenu pop; +ts0^;QO2{  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); D/ Dt   
 CMenu*pMenu=pop.GetSubMenu(0); Vw~\H Gs/~  
 pMenu->SetDefaultItem(ID_EXITICON); @PSLs *  
 CPoint pt; w/m:{cHk  
 GetCursorPos(&pt); ^4pto$#@O:  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); rx!=q8=0R  
 if(id==ID_EXITICON) n7! H:{L  
  DeleteIcon(); [TTSA2  
 else if(id==ID_EXIT) WNy3@+@GZ  
  OnCancel(); 46No%cSiG  
 return FALSE; A)NkT`<)  
} 2`bdrRD0  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); =RKSag&  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) f.xA_Y>  
 AddIcon(); jndGiMA  
 return res; qoX@@xr1  
} ]A+o>#n}x  
Es4qPB`g.  
void CCaptureDlg::AddIcon() lpm JLH.F  
{ ] d?x$>  
 NOTIFYICONDATA data; 8e2?tmWM  
 data.cbSize=sizeof(NOTIFYICONDATA); zT9JBMNE:  
 CString tip;  jNyoN1M  
 tip.LoadString(IDS_ICONTIP); #&8rcu;/  
 data.hIcon=GetIcon(0); 7Y( 5]A9=  
 data.hWnd=GetSafeHwnd(); Ng=ONh  
 strcpy(data.szTip,tip); \RG!@$i  
 data.uCallbackMessage=IDM_SHELL;  9A$m$  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; KZ:hKY@q  
 data.uID=98; h<l1U'Bn7  
 Shell_NotifyIcon(NIM_ADD,&data); %,q. ),F  
 ShowWindow(SW_HIDE); anN#5jt  
 bTray=TRUE; '%;\YD9  
} #x@eDnb_  
0C$vS`s&  
void CCaptureDlg::DeleteIcon() 27Emm c  
{ ccJM>9  
 NOTIFYICONDATA data; [\e@_vY@OH  
 data.cbSize=sizeof(NOTIFYICONDATA); &^.57]  
 data.hWnd=GetSafeHwnd(); z\!K<d"Xv  
 data.uID=98; X[3}?,aqL  
 Shell_NotifyIcon(NIM_DELETE,&data); Ip *g'  
 ShowWindow(SW_SHOW); wdas1  
 SetForegroundWindow(); c j$6  
 ShowWindow(SW_SHOWNORMAL); }}{Yw  
 bTray=FALSE; H=^K@Ti:  
} <V&5P3)d9  
'MxSd(T =  
void CCaptureDlg::OnChange() F"jt&9jg  
{ 5/0j}_pP  
 RegisterHotkey(); 1DJekiWf  
} (p)!Mq "^  
CI7A# 6-  
BOOL CCaptureDlg::RegisterHotkey() aaW]J mRb  
{ $'wq1u  
 UpdateData(); jLVl4h&  
 UCHAR mask=0; 2I'~2o  
 UCHAR key=0; gzn^#3b  
 if(m_bControl) a2@c%i  
  mask|=4; 42C<1@>zO  
 if(m_bAlt) \Y|*Nee}XP  
  mask|=2; YTaLjITG  
 if(m_bShift) R^&q-M=O[  
  mask|=1; 8Cx^0  
  key=Key_Table[m_Key.GetCurSel()]; 1Y j~fb(  
 if(bRegistered){ gE7L L=x  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); Dl\`  
  bRegistered=FALSE; b1?xeG#  
 } *f+: <=i  
 cMask=mask; hGTV;eU  
 cKey=key; *C|  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); :l\V'=%9'@  
 return bRegistered; :l u5Uu~  
} O6s.<` \  
iJh!KEy~A5  
  四、小结 Sm{>rR  
-G|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