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
  • 7058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: >A L^y( G  
  F CfU=4O  
  一、实现方法 N4yQ,tG>aa  
@[$q1Nm  
  热键管理DLL实际上是一个键盘钩子,由它来监视系统的键盘事件。如果有和程序登记符合的按键组合就通知该程序的窗口。为了应用方便,本实例把它做成了一个标准的管理库来为其它的程序通过热键服务,它有两个输出函数:AddHotkey()和DeleteHotkey(),程序只需要调用这两个函数就可以了,如果编译之后不用改变热键,则只需要AddHotkey就可以了。DLL中的所有的全局变量都放在一个共享段中,定义如下: Rh@UxNy\,  
k^UrFl  
#pragma data_seg("shareddata") o(i?_4 E  
HHOOK hHook =NULL; //钩子句柄 bC&xN@4  
UINT nHookCount =0; //挂接的程序数目 i94)DWZ^  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 )Y1+F,C  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 ` gor  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey We"\nOP  
static int KeyCount =0; RBeQT=B8~  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 u69G #  
#pragma data_seg() V8%( h[  
P=4o)e7E!  
  关于共享段,有几点重要的说明:一是必须在链接选项里指定该段为共享:一种方法是在project->settings->link->object/library中加上/section:shareddata,rws;第二种方法是在def文件的sections里加上一句shareddata read write shared;第三种指定共享段的方法在程序里加上一句#pragma comment(linker,"section:shareddata,rws")。二是所有的变量必须初始化,否则链接程序会把它放到普通数据段。三是如果不初始化变量,需要在段外用"__declspec(allocate("shareddata")) 变量类型 变量名"的方式定义。 G>2: WQ/  
_>{"vY  
  DLL中的两个输出函数分别用来添加/删除热键,函数代码如下: gln X C  
#@uF?8u  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR y 0fI7:e3  
cKey,UCHAR cMask) ot^$/(W  
{ l2 #^}-  
 BOOL bAdded=FALSE; u&Xn#f h  
 for(int index=0;index<MAX_KEY;index++){ a&n}pnEn)  
  if(hCallWnd[index]==0){ &nn+X%m9g  
   hCallWnd[index]=hWnd; S#ud<=@!9  
   HotKey[index]=cKey; .Dyxul  
   HotKeyMask[index]=cMask; KJ6:ZTbW  
   bAdded=TRUE; o2riy'~  
   KeyCount++; 9>L{K   
   break; rEs Gf+4  
  } 4g/Ly8  
 } q9m-d-!)  
 return bAdded; <K~mg<ff$  
} V34]5  
//删除热键 * p,2>[e  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) ].*I Z  
{ :P\RiaZAT  
 BOOL bRemoved=FALSE; 6[C>"s}Ol  
 for(int index=0;index<MAX_KEY;index++){ 0o&c8?@j  
  if(hCallWnd[index]==hWnd){ :eTzjW=  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ v>p~y u+G  
    hCallWnd[index]=NULL; P*8DM3':  
    HotKey[index]=0; 3l''   
    HotKeyMask[index]=0; #-FfyxQ8ai  
    bRemoved=TRUE; .Vb\f  
    KeyCount--; 8#~x6\!b  
    break; ?Kf?Z`9 *Y  
   } dpcFS0  
  } -D30(g{O  
 } 3%SwCYd  
 return bRemoved; tcS7 @^'  
} 79Si^n1\  
/N(Ol WEp  
G~Mxh,aD$>  
  DLL中的钩子函数如下: M8' GbF=1  
n g?kl|VG  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) <gc\ ,P<ru  
{ \HZ]=B#0  
 BOOL bProcessed=FALSE; Rd{#cW~  
 if(HC_ACTION==nCode) H$n{|YO `  
 { C@[f Z  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 :%vD hMHa  
   switch(wParam) 75t5:>"[  
   {  9zK5Y+!  
    case VK_MENU: SPK% ' s  
     MaskBits&=~ALTBIT; W"L;8u  
     break; ,~,{$\p   
    case VK_CONTROL: -& \?Q_6  
     MaskBits&=~CTRLBIT; /6@Wm? `DB  
     break; H- aSLc  
    case VK_SHIFT: WAt| J2  
     MaskBits&=~SHIFTBIT; } h pTS_  
     break; Y^W.gGM  
    default: //judge the key and send message $s-HG[lX[  
     break; \+B+M 7  
   } ]@MBE1M  
   for(int index=0;index<MAX_KEY;index++){ C 9:5c@G  
    if(hCallWnd[index]==NULL) e^ygQ<6%  
     continue; -P>f2It  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) ;F!wyTF>}  
    { 4TW>BA  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP);  B Ji  
     bProcessed=TRUE; 2K1odqO#   
    } K1K3s< y+  
   } 'v*Y7zZ#K  
  } .U:DuyT  
  else if((lParam&0xc000ffff)==1){ //有键按下 [J.-gN$X@  
   switch(wParam) hhVyz{u  
   { Z#lZn!EbK  
    case VK_MENU: H7"m/Bia  
     MaskBits|=ALTBIT; Nn;p1n dN  
     break; !(EJ.|LH  
    case VK_CONTROL: On{p(| l  
     MaskBits|=CTRLBIT; pK~K>8\  
     break; hVAP )"5  
    case VK_SHIFT: $|yO mh  
     MaskBits|=SHIFTBIT; ch%-Cg~%  
     break; b8@gv OB  
    default: //judge the key and send message $`&uu  
     break; .v3~2r*&  
   } )Ekp <2B:0  
   for(int index=0;index<MAX_KEY;index++){ `/mcjKQ&9y  
    if(hCallWnd[index]==NULL) Uxq9H  
     continue; )./%/ _*K  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) [z1[4  
    { W1 qE,%cx  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); \*V`w@  
     bProcessed=TRUE; C?3?<FDL  
    } fQ^45ulz  
   } 9)a:8/Y  
  } /k(KA [bS  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 "c6(=FFq  
   for(int index=0;index<MAX_KEY;index++){  OBY  
    if(hCallWnd[index]==NULL) Q( C\X  
     continue; ]~SOGAFW  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) ?{ "_9g9  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); *k(>Qsb "  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 >~kSe=Hsb4  
   } dX0"h5v1  
  } wh\J)pA1  
 } $~V,.RD  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); I3A@0'Vm;L  
} Rmrv@.dr!  
(\ze T5  
  抓图程序是一个基于对话框的程序,它在建立对话框的时候调用前面的DLL,登记热键,因此需要将hook.lib添加到工程里,在程序里给出两个DLL函数的定义,也可以写个头文件,再包含进来以下代码: P-?ya!@"  
y/ #{pyJ  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); *jps}uk<  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); RfMrGC^?  
(P-Bmu!s  
  为了添加应用程序对热键通知事件的响应,程序中用的办法是重载WindowProc()函数,该函数代码如下: {:VUu?5-t;  
szY=N7\S*  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) S[bFS7[  
{ j#TtY|Po  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) +K3SAGm  
 { 1%YjY"j+  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 3@r_t|j  
  SaveBmp(); Khbkv  
  return FALSE; ab1qcQ<  
 } EPQ~V  
 …… //其它处理及默认处理 R(c:#KF#8  
} d85\GEF9i  
9}{i8 <$=  
h]rF2 B  
  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。 LeA=*+zP[  
tH_e?6]  
  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。 vxxa,KR/y  
H1(Zz n1  
  二、编程步骤 XCNfogl  
K +oFu%  
  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"; S+Aq0B<  
5YlY=J  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; Dl kHE8r\  
m]yt6b4  
  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; Y~qv 0O6K  
KKR@u(+"a  
  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; _R!KHi  
x<'(b7{U0  
  5、 添加代码,编译运行程序。 k\T,CZ<  
}*{@-v|_R  
三、程序代码 s6(iiB%d  
D{&0r.2F  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL 8#OcrJzC  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) -uDB#?q:W  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ D@V1}/$UoN  
#if _MSC_VER > 1000 '2u(fLq3h  
#pragma once xS) njuq4  
#endif // _MSC_VER > 1000 `.f {V  
#ifndef __AFXWIN_H__ | fMjg'%{}  
#error include 'stdafx.h' before including this file for PCH "5]Fl8c?  
#endif _`>F>aP  
#include "resource.h" // main symbols :/N/u5.]  
class CHookApp : public CWinApp &C eG4_Mi  
{ 7q&//*%yF  
 public: j +j2_\  
  CHookApp(); *t{$GBP  
  // Overrides !c`K zqP  
  // ClassWizard generated virtual function overrides x/NR_~Rnk  
  //{{AFX_VIRTUAL(CHookApp) 6~KtT{MYQ  
 public: c?qg i"kS  
  virtual BOOL InitInstance(); VtX9}<Ch~  
  virtual int ExitInstance(); i<N[sO  
  //}}AFX_VIRTUAL ~+1t3M e  
  //{{AFX_MSG(CHookApp) 5cbtMNP  
  // NOTE - the ClassWizard will add and remove member functions here. &UhI1mi]h  
  // DO NOT EDIT what you see in these blocks of generated code ! T~%}(0=m  
  //}}AFX_MSG %RE-_~GF  
  DECLARE_MESSAGE_MAP() 8Wn;U!qT  
}; `C~RA, M  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); 4Gl0h'!(  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); En:.U9?X  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); bkQEfx.  
BOOL InitHotkey(); Vy;f4;I{  
BOOL UnInit(); <MgR x9  
#endif 2IgTB|2  
mE3^5}[>  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. E5d?toZ,8"  
#include "stdafx.h" G.2ij%Zz  
#include "hook.h" <}~`YU>=v  
#include <windowsx.h> ?@U7tNI  
#ifdef _DEBUG ].f28bY  
#define new DEBUG_NEW G3{t{XkV  
#undef THIS_FILE TqbDj|7`R  
static char THIS_FILE[] = __FILE__; u<x2"0f  
#endif }cK<2J#  
#define MAX_KEY 100 .\kcWeC\  
#define CTRLBIT 0x04 2BLcun  
#define ALTBIT 0x02 wYtL1D(  
#define SHIFTBIT 0x01 `=A*ei5  
#pragma data_seg("shareddata") c+l1#[Dnc  
HHOOK hHook =NULL; l MCoc'ae  
UINT nHookCount =0; _qg)^M6  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey *={` %  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT yvxdl=s  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey x0^O?UR  
static int KeyCount =0; x!klnpGp  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift ZCJOh8  
#pragma data_seg() 3.q%?S}*  
HINSTANCE hins; tGGv 2TCEy  
void VerifyWindow(); T+z]ztO  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) pK=$)<I"6  
//{{AFX_MSG_MAP(CHookApp) [h "*>J{  
// NOTE - the ClassWizard will add and remove mapping macros here. d52l)8  
// DO NOT EDIT what you see in these blocks of generated code! Kq}/`P  
//}}AFX_MSG_MAP Vv=/{31  
END_MESSAGE_MAP() oQgd]| v  
M_tY:v  
CHookApp::CHookApp() 8spoDb.S  
{ K~"J<798{  
 // TODO: add construction code here, '=!@s1;{[;  
 // Place all significant initialization in InitInstance 7cx~?xk <m  
} xaO9?{O  
-%]O-'  
CHookApp theApp; TRwlUC3hQ  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) L8K= Q  
{ 5y7rY!]Bf  
 BOOL bProcessed=FALSE; #3@ Du(_n  
 if(HC_ACTION==nCode) ?Xm!;sS0  
 { 8H4"mxO  
  if((lParam&0xc0000000)==0xc0000000){// Key up 1iq,Gd-G.  
   switch(wParam) <7HVkAa  
   { J&4QI( b.  
    case VK_MENU: S pxkB!  
     MaskBits&=~ALTBIT; QFOmnbJg  
     break; 5mB%Xh;bg  
    case VK_CONTROL: #L}Y Z  
     MaskBits&=~CTRLBIT; uGm~ Oo  
     break; rQ|^H Nj  
    case VK_SHIFT: k CkSu-  
     MaskBits&=~SHIFTBIT; NvH9?Ek"  
     break; |cpBoU  
    default: //judge the key and send message qd*3| O^  
     break; '< ]:su+  
   } 7.fpGzUM  
   for(int index=0;index<MAX_KEY;index++){ WPVur{?<  
    if(hCallWnd[index]==NULL) "KQ3EI/g  
     continue; dR"H,$UH  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) 5b X*8H D  
    { :TU;%@7  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); %M{qr!?uj  
     bProcessed=TRUE; Zw+VcZz3  
    } jR-`ee}y2  
   } s BP.P7u  
  } m(QGP\Ya  
  else if((lParam&0xc000ffff)==1){ //Key down :0,q>w  
   switch(wParam) j .Ro(0%  
   { cU8Rm\?  
    case VK_MENU: mm-!UsT  
     MaskBits|=ALTBIT; M,]C(f>  
     break; 7'wt/9  
    case VK_CONTROL: ~=hM y`Ml  
     MaskBits|=CTRLBIT; :.kc1_veYS  
     break; {~.~ b+v  
    case VK_SHIFT: dz fR ^Gv  
     MaskBits|=SHIFTBIT; X|+o4R?  
     break; oTOr,Mn0\6  
    default: //judge the key and send message R;,&s!\<  
     break; N6wea]  
   } WP,Ll\K)7  
   for(int index=0;index<MAX_KEY;index++) {awv= s  
   { .`Ey'T_  
    if(hCallWnd[index]==NULL) ?sQOz[ig;  
     continue; D=}UKd  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) %H=d_Nm{  
    { C?@vBM}  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); X`km\\*  
     bProcessed=TRUE; lz>YjK:  
    } f49pIcAq  
   } ~!( (?8"  
  } +2%ih !  
  if(!bProcessed){ lSv?!2  
   for(int index=0;index<MAX_KEY;index++){ P" +!mSe^~  
    if(hCallWnd[index]==NULL) 61|uvTX  
     continue; ~hi\*W6jg  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) .?7u'%6x?{  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); tfzIem  
   } xWk:7,/  
  } V<~.:G$3H  
 } <<#-IsT  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); _'9("m V  
} OO?d[7Wt0  
=O= 0 D  
BOOL InitHotkey() :s8^nEK  
{ 8S2sNpLi-g  
 if(hHook!=NULL){ Xup rl2+  
  nHookCount++; VOc_7q_=  
  return TRUE; ~R7F[R  
 } Oax*3TD  
 else -# 0(Jm'  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); F?!P7 zW  
  if(hHook!=NULL) "`P/j+-rt  
   nHookCount++; GT$.#};u  
  return (hHook!=NULL); l,cnM r^.W  
} AF ,*bb  
BOOL UnInit() W;~ f865  
{ e>yPFXSk  
 if(nHookCount>1){ W\mj?R   
  nHookCount--; h`O"]2  
  return TRUE; NfG<!  
 } ,(d\!T/]'  
 BOOL unhooked = UnhookWindowsHookEx(hHook); Jg3OM Ut  
 if(unhooked==TRUE){ bI~ R6o  
  nHookCount=0; vW`Dy8`06  
  hHook=NULL; 5`su^  
 } ,;3#}OGg  
 return unhooked; }yQ&[Mt  
} R*Jnl\?>@  
kKbq?}W[  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask)  "R8:s  
{ +tsF.Is!t  
 BOOL bAdded=FALSE; _5<d'fBd  
 for(int index=0;index<MAX_KEY;index++){ p mv6m  
  if(hCallWnd[index]==0){ XO[S(q  
   hCallWnd[index]=hWnd; W5C8$Bqm  
   HotKey[index]=cKey; {wUbr^  
   HotKeyMask[index]=cMask; OIi8x? .~]  
   bAdded=TRUE; bv %Bo4s  
   KeyCount++; yVF1*#"  
   break; ~Mk{2;x  
  }  Y j[M>v  
 } _~q!<-Z  
 return bAdded; .3xpDVW^e  
} &BF97%E2  
M  ::  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) GnAG'.t-Z  
{ 2x PkQOj3  
 BOOL bRemoved=FALSE; w'Y(doY ,  
 for(int index=0;index<MAX_KEY;index++){ OS$}ej\  
  if(hCallWnd[index]==hWnd){ 6I)[6R  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ 0tA~Y26  
    hCallWnd[index]=NULL; ?vA)F)MS   
    HotKey[index]=0; .h({P#QT  
    HotKeyMask[index]=0; 9jwcO)p^  
    bRemoved=TRUE; Ej_>*^b  
    KeyCount--; G6W_)YL  
    break; }s+ t*z  
   } ibzcO,c  
  } y]3`U UvXD  
 } _H{6{!=y  
 return bRemoved; &xhwx>C`K  
} p\;\hHai  
jl-2)<  
void VerifyWindow() Whoqs_Mm{  
{ qV;E% XkkS  
 for(int i=0;i<MAX_KEY;i++){ =sm<B^yj  
  if(hCallWnd!=NULL){ X`/GiYTu  
   if(!IsWindow(hCallWnd)){ #@pgB:~lB  
    hCallWnd=NULL; b#uNdq3  
    HotKey=0; n*gr(S  
    HotKeyMask=0; RIC\f_Dv  
    KeyCount--; 6XP>qI,AJ  
   } "0*yD[2  
  } w!/\dqjv  
 } ^$FNu~|K  
} s<z`<^hRe  
_ MsO2A  
BOOL CHookApp::InitInstance() 2/WtOQI B  
{ PpXzWWU":  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); GGM|B}U p  
 hins=AfxGetInstanceHandle(); [zC1LTXe  
 InitHotkey(); CdEQiu  
 return CWinApp::InitInstance(); EF>vu+YK  
} ]|JQH  
IOfxx>=3  
int CHookApp::ExitInstance() h.Y&_=Gc  
{ ddTsR  
 VerifyWindow(); lF*}l  
 UnInit(); D =+md  
 return CWinApp::ExitInstance(); UWW^g@d4  
} %>p[;>jW  
.2Q4EbM2  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file W)X" G3  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) #!0=I s^  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ N>TmaUk  
#if _MSC_VER > 1000 Y YE{zU  
#pragma once o*k.je1  
#endif // _MSC_VER > 1000 jo-2D[Q{  
%`EyG  
class CCaptureDlg : public CDialog M2kvj'WWq  
{ -(dtAo6  
 // Construction Wtwo1pp  
 public: pD@:]VP  
  BOOL bTray; | 2Vhj<6  
  BOOL bRegistered; ]KQv ]'  
  BOOL RegisterHotkey(); 9T\uOaC"  
  UCHAR cKey; n1!}d%:  
  UCHAR cMask; VGY x(  
  void DeleteIcon(); k~0#Iy_{M  
  void AddIcon(); r*q  
  UINT nCount; cv{icz,%w  
  void SaveBmp(); 3u 'VPF2  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor 7"_m?c8  
  // Dialog Data zb]e {$q2C  
  //{{AFX_DATA(CCaptureDlg) QkFB \v  
  enum { IDD = IDD_CAPTURE_DIALOG }; sH'IA~7   
  CComboBox m_Key; =ea'G>;[H  
  BOOL m_bControl; q"48U.}T  
  BOOL m_bAlt; l`bl^~xRo  
  BOOL m_bShift; %jE0Z4\  
  CString m_Path; !+k);;.+  
  CString m_Number; NR>&1aRbyb  
  //}}AFX_DATA SeV`RUO  
  // ClassWizard generated virtual function overrides 8aqH;|fG}  
  //{{AFX_VIRTUAL(CCaptureDlg) K/YXLR +  
 public: +C}s"qrb@  
  virtual BOOL PreTranslateMessage(MSG* pMsg); UVd ^tg  
 protected: HJi FlL3  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support WaPuJ 5;e  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); &ggOm  
  //}}AFX_VIRTUAL lt{D f~c  
  // Implementation \wKnX]xGf  
 protected: ]+k]Gbty6  
  HICON m_hIcon; "X(9.6$_  
  // Generated message map functions y$}o{VE{x  
  //{{AFX_MSG(CCaptureDlg) |2Y/l~  
  virtual BOOL OnInitDialog(); E5$Fhc   
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); [t6Y,yo&h4  
  afx_msg void OnPaint(); 43}uW, P  
  afx_msg HCURSOR OnQueryDragIcon(); ~} 02q5H  
  virtual void OnCancel(); !C&  ^%a  
  afx_msg void OnAbout(); ` t>A~.f  
  afx_msg void OnBrowse(); !gm@QO cF  
  afx_msg void OnChange(); >1qum'  
 //}}AFX_MSG 8DuD1hZq  
 DECLARE_MESSAGE_MAP() HEk{!Y  
}; ,rNv}  
#endif \>\_OfY1W  
Pil_zQ4  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file !DM GAt\  
#include "stdafx.h" fB)S:f|  
#include "Capture.h" 7Y%Si5  
#include "CaptureDlg.h" K0{ ,*>C  
#include <windowsx.h> n%ypxY0  
#pragma comment(lib,"hook.lib") |})v, o B  
#ifdef _DEBUG  9+ A~(  
#define new DEBUG_NEW V}MRdt7  
#undef THIS_FILE Qp;FVUw9  
static char THIS_FILE[] = __FILE__; ;04< 9i  
#endif arc{:u.K  
#define IDM_SHELL WM_USER+1 w.(?O;  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); |\U5m6q  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); r h c&#JS  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; V/+D]  
class CAboutDlg : public CDialog 5K,=S  
{ Sc?q}tt^C  
 public: aF{1V \e  
  CAboutDlg(); =`k', V_  
  // Dialog Data =p[a Cb i  
  //{{AFX_DATA(CAboutDlg) %,+&Kl I  
  enum { IDD = IDD_ABOUTBOX }; z.~jqxA9  
  //}}AFX_DATA (j-_iOQ]i+  
  // ClassWizard generated virtual function overrides '-BD.^!!  
  //{{AFX_VIRTUAL(CAboutDlg) ,YBe|3  
 protected: 2@!B;6*8q  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support r+ usMF<'  
  //}}AFX_VIRTUAL #0:rBKm,  
  // Implementation YCq:]  
 protected: [a!)w@I:  
  //{{AFX_MSG(CAboutDlg) U/A [al  
  //}}AFX_MSG 6@x^,SA  
  DECLARE_MESSAGE_MAP() @e-2]z  
}; :rU,7`sE/  
6@VgLa,  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) -br): }f  
{ e!ql8wbp  
 //{{AFX_DATA_INIT(CAboutDlg) LvCX(yjZ*  
 //}}AFX_DATA_INIT v"l8[::  
} &bigLe  
IQWoK"B  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) K 8W99:v  
{ LMNmG]#!  
 CDialog::DoDataExchange(pDX); P VSz%"  
 //{{AFX_DATA_MAP(CAboutDlg) t[ZGY,8  
 //}}AFX_DATA_MAP }LY)FT4n  
} X.V4YmZ- ;  
*/OKg;IMi  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) bZ#5\L2  
 //{{AFX_MSG_MAP(CAboutDlg) 6MpV ,2:>  
 // No message handlers ; Kh!OBZFo  
 //}}AFX_MSG_MAP nwVW'M]r  
END_MESSAGE_MAP() 4>Y*owa4  
A: O"N  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) zJ_y"bt  
: CDialog(CCaptureDlg::IDD, pParent) SPp|/ [i7  
{ _h I81Lzq  
 //{{AFX_DATA_INIT(CCaptureDlg) LvMA('4  
  m_bControl = FALSE; pV`/6 }  
  m_bAlt = FALSE; '?6j.ms M  
  m_bShift = FALSE; ? U* `!-  
  m_Path = _T("c:\\"); !j& #R%D  
  m_Number = _T("0 picture captured."); z<_a4 ffR  
  nCount=0; ]QQeUxi  
  bRegistered=FALSE; }1 j'  
  bTray=FALSE; =&)R2pLs*  
 //}}AFX_DATA_INIT 7M~/[f7Z{  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 pM~-o?  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); buDz]ec b  
} S4pEBbV^n  
Q)=2%X  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) Z^J 7r&\V  
{ \zeuvD  
 CDialog::DoDataExchange(pDX); BZ(DP_}&D  
 //{{AFX_DATA_MAP(CCaptureDlg) "y60YYn-#J  
  DDX_Control(pDX, IDC_KEY, m_Key); ^I{/j 'b&  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); 2$'bOo  
  DDX_Check(pDX, IDC_ALT, m_bAlt); {$V2L4  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); R+El/ya:6  
  DDX_Text(pDX, IDC_PATH, m_Path); Y8h 96  
  DDX_Text(pDX, IDC_NUMBER, m_Number); y[zjs^-vCv  
 //}}AFX_DATA_MAP Yq'D-$@  
} #8$" 84&N.  
O=jzz&E+  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) S~>R}=  
//{{AFX_MSG_MAP(CCaptureDlg) iz0:  
 ON_WM_SYSCOMMAND() fX2OH)6U  
 ON_WM_PAINT() Hzz v 6k  
 ON_WM_QUERYDRAGICON() !;Ke#E_d  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) hrGX65>  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) %/d1x  
 ON_BN_CLICKED(ID_CHANGE, OnChange) s{*bFA Z1F  
//}}AFX_MSG_MAP ^v+p@k  
END_MESSAGE_MAP() czsnPmNEI  
r5y*SoD!  
BOOL CCaptureDlg::OnInitDialog() D=SjCmG  
{ ?Iu=os>*  
 CDialog::OnInitDialog(); ff]fN:}V  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); r[wjE`Z/T  
 ASSERT(IDM_ABOUTBOX < 0xF000); !3{;oU%*  
 CMenu* pSysMenu = GetSystemMenu(FALSE); _M^^0kf  
 if (pSysMenu != NULL)  $ Tal.  
 { j<k-w  
  CString strAboutMenu; [ P,gEYk  
  strAboutMenu.LoadString(IDS_ABOUTBOX); y#= j{  
  if (!strAboutMenu.IsEmpty()) FV{XPr%   
  { "ji+~%`^[t  
   pSysMenu->AppendMenu(MF_SEPARATOR); L#%)@  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); q7I!wD9Cff  
  } n(i/jW~0w  
 } rM? J40&.  
 SetIcon(m_hIcon, TRUE); // Set big icon M@Ti$=  
 SetIcon(m_hIcon, FALSE); // Set small icon v57<b&p26  
 m_Key.SetCurSel(0); F3t IJz>3  
 RegisterHotkey(); qt6@]Y  
 CMenu* pMenu=GetSystemMenu(FALSE); [NV/*>"j&  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); j<R&?*  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); >WLHw!I!6  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); U\!9dhx  
 return TRUE; // return TRUE unless you set the focus to a control 8A}<-?>  
} DS_0p|2  
"y5bODq3t  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) x[u6_6=q9  
{ qj4jM7  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) y;(G%s1  
 { P#V}l'j(<a  
  CAboutDlg dlgAbout; lPrAx0m13%  
  dlgAbout.DoModal(); >x6)AH.  
 } 5tk7H2K^<  
 else *!j!o%MB  
 { J/3$I  
  CDialog::OnSysCommand(nID, lParam); saDu'SmYV  
 } ~=I:go  
} fWb+08}C  
)1YX+',"  
void CCaptureDlg::OnPaint() 2.\"Q  
{ Y/?z8g'p  
 if (IsIconic()) LXZI|K[}k  
 { 3`)ej`  
  CPaintDC dc(this); // device context for painting G&t|aY-   
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); 7#SfuZ0@  
  // Center icon in client rectangle x&"P^gh)  
  int cxIcon = GetSystemMetrics(SM_CXICON); p/G9P +?  
  int cyIcon = GetSystemMetrics(SM_CYICON); 5m;BL+>YE  
  CRect rect; KUpj.[5 qo  
  GetClientRect(&rect); g9=_^^Tg  
  int x = (rect.Width() - cxIcon + 1) / 2; \}X[0ct2!  
  int y = (rect.Height() - cyIcon + 1) / 2; > 6=3y4tP  
  // Draw the icon ^ 8YBW<9  
  dc.DrawIcon(x, y, m_hIcon); |>1#)cONW  
 } Cs\jPh;"  
 else ;/kmV~KG  
 { H}q$6W E  
  CDialog::OnPaint(); )3<>H!yG}  
 } uvw1 _j?  
} oX'@,(6)  
nyxoa/  
HCURSOR CCaptureDlg::OnQueryDragIcon() i29a1nD4Hm  
{ fwlicbs'  
 return (HCURSOR) m_hIcon; 27}7 n  
} m&z(2yb1  
'=eVem=  
void CCaptureDlg::OnCancel() fJ6Q:7  
{ $*LBZcL  
 if(bTray) /8<c~  
  DeleteIcon(); S]Di1E^r;_  
  CDialog::OnCancel(); U3{4GmrT  
} _/u(:  
((<\VQ,>(  
void CCaptureDlg::OnAbout() `U|zNizO  
{ 0cVxP)J+  
 CAboutDlg dlg; W}%"xy]N  
 dlg.DoModal(); k+J63+obd  
} Y\+LBbB8  
UJ(UzKq8  
void CCaptureDlg::OnBrowse() mx}4iO:Xp  
{ NciIqF  
 CString str; Pc7p2  
 BROWSEINFO bi; a*:GCGe  
 char name[MAX_PATH]; %NTJih`  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); /k(wb4Hv  
 bi.hwndOwner=GetSafeHwnd(); EziGkbpd@  
 bi.pszDisplayName=name; IGi9YpI&K  
 bi.lpszTitle="Select folder"; 1o_6WU  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; g \ou+M#  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); kbJ4CF}H  
 if(idl==NULL) B6KG\,'|  
  return; 2$`Y 4b3t  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); ^SW9J^9  
 str.ReleaseBuffer(); K4+|K:e  
 m_Path=str; 71ab&V il  
 if(str.GetAt(str.GetLength()-1)!='\\') b'z\|jY  
  m_Path+="\\"; XHOS"o$y  
 UpdateData(FALSE); lN0u1)'2  
} 8R-;cBT  
]!N=Z }LD  
void CCaptureDlg::SaveBmp() Hl'AnxE  
{ VE1j2=3+o  
 CDC dc; 4tx6h<L#s  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); @; I9e  
 CBitmap bm; v(=0hY9 O  
 int Width=GetSystemMetrics(SM_CXSCREEN); g!o2vTt5  
 int Height=GetSystemMetrics(SM_CYSCREEN); ,V^$Meh  
 bm.CreateCompatibleBitmap(&dc,Width,Height); ^".6~{  
 CDC tdc; Azp!;+  
 tdc.CreateCompatibleDC(&dc); ULgp]IS  
 CBitmap*pOld=tdc.SelectObject(&bm); %Pj}  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); '#e T  
 tdc.SelectObject(pOld); {E7STLQ_%  
 BITMAP btm;  qmenj  
 bm.GetBitmap(&btm); ?Zk;NL9  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; @*- 6DG-f  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); Li$2 Gpc/  
 BITMAPINFOHEADER bih; 0&b;!N!vJ  
 bih.biBitCount=btm.bmBitsPixel; N8x.D-=gG  
 bih.biClrImportant=0; fO .=i1 E}  
 bih.biClrUsed=0; lC,~_Yb  
 bih.biCompression=0; !IB}&m  
 bih.biHeight=btm.bmHeight; +Z86Qz_  
 bih.biPlanes=1; b`,Sd.2=('  
 bih.biSize=sizeof(BITMAPINFOHEADER); ' I!/I  
 bih.biSizeImage=size; 8xG"hJR  
 bih.biWidth=btm.bmWidth; [Fv,`*/sm  
 bih.biXPelsPerMeter=0; 8.7q -<Q  
 bih.biYPelsPerMeter=0; ;DVg[#  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); :^xNHMp!  
 static int filecount=0; *[BtW5 6-  
 CString name; P=\Hi.]%  
 name.Format("pict%04d.bmp",filecount++); gW9`k,U  
 name=m_Path+name; 9_e_Ne`i`?  
 BITMAPFILEHEADER bfh; 3(vm'r&5n>  
 bfh.bfReserved1=bfh.bfReserved2=0; ='_3qn.  
 bfh.bfType=((WORD)('M'<< 8)|'B'); i\gt @  
 bfh.bfSize=54+size; 79-5 0}A  
 bfh.bfOffBits=54; x; -D}#  
 CFile bf; Kp1 F"!  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ q^n LC6q  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); ;Ru[^p.{  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); H*P+>j&  
  bf.WriteHuge(lpData,size); Zk>m!F>,p  
  bf.Close(); a/3'!}&e  
  nCount++; t~nW&]E  
 } %+;l|Z{Uf  
 GlobalFreePtr(lpData); `D$^SHfyz  
 if(nCount==1) z"QXPIXPk  
  m_Number.Format("%d picture captured.",nCount); yLK %lP  
 else &0"*.:J9  
  m_Number.Format("%d pictures captured.",nCount); m\bmBK"I  
  UpdateData(FALSE);  H{Lt,#  
} 7Kb&BF|Q  
VB T 66kV  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) ,dw\y/dn  
{ {;zHkmx  
 if(pMsg -> message == WM_KEYDOWN) o@]n<ZYo  
 { _x#y   
  if(pMsg -> wParam == VK_ESCAPE) bAuiMw7!  
   return TRUE; V[kn'QkWv  
  if(pMsg -> wParam == VK_RETURN) 0uPcEpIA  
   return TRUE; +7n vy^m  
 } pGy k61  
 return CDialog::PreTranslateMessage(pMsg); *yo'Nqu  
} -yg;,nCg  
 yOvV"x]  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) DIWyv-  
{ ,j\uvi(Y  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ v0tFU!Q%  
  SaveBmp(); dLwP7#r  
  return FALSE; 4mEJu  
} Gm=&[?}  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ l @@pXg3  
 CMenu pop; ^P/OHuDL  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1));  w}t}Sh  
 CMenu*pMenu=pop.GetSubMenu(0); m qUDve(  
 pMenu->SetDefaultItem(ID_EXITICON); !dcvG9JZ  
 CPoint pt; |ITb1O`_P  
 GetCursorPos(&pt); -f1}N|hy  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); ;X0uA?  
 if(id==ID_EXITICON) 8x7TK2r  
  DeleteIcon(); [;F!\B-  
 else if(id==ID_EXIT) <S6?L[_  
  OnCancel(); hN gT/y8  
 return FALSE; !W0JT#0  
} 7.g,&s%q  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); \u[5O@v#  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) "&^KnWk=  
 AddIcon(); fb^R3wd$ff  
 return res; nA.U'=`  
} 4e; le&  
_%B,^0;C  
void CCaptureDlg::AddIcon() .pm%qEh  
{ OT6Te&  
 NOTIFYICONDATA data; 9.( [,J  
 data.cbSize=sizeof(NOTIFYICONDATA); zcH"Kh&  
 CString tip; R%)F9P$o  
 tip.LoadString(IDS_ICONTIP); yv>uzb`N  
 data.hIcon=GetIcon(0); i.?rom  
 data.hWnd=GetSafeHwnd(); _4#7 ?p  
 strcpy(data.szTip,tip); 9Av{>W?  
 data.uCallbackMessage=IDM_SHELL; b E40^e  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; C#1'kQO  
 data.uID=98; F{.g05^y  
 Shell_NotifyIcon(NIM_ADD,&data); 6cbV[ !BL  
 ShowWindow(SW_HIDE); NiE`u m  
 bTray=TRUE; _ D8 zKp  
} |UQ [pas  
US-f<Wq  
void CCaptureDlg::DeleteIcon() EGFPv'De  
{ R$`&g@P="  
 NOTIFYICONDATA data; @KLX,1K  
 data.cbSize=sizeof(NOTIFYICONDATA); xcQ^y}JN  
 data.hWnd=GetSafeHwnd(); D(dV{^} 9  
 data.uID=98; oY,{9H37b  
 Shell_NotifyIcon(NIM_DELETE,&data); :J2^Y4l2  
 ShowWindow(SW_SHOW); 85] 'I%gT  
 SetForegroundWindow(); D@[#7:rHL  
 ShowWindow(SW_SHOWNORMAL); Q`Pe4CrWvu  
 bTray=FALSE; +u\w4byl  
} +ek6}f#  
[)I W9E v  
void CCaptureDlg::OnChange() FB>P39u  
{ -O/[c  
 RegisterHotkey(); V2@( BliP  
} $-!7<a-  
hjk]?MC  
BOOL CCaptureDlg::RegisterHotkey() ,kYX|8SO  
{ bu \(KR$s  
 UpdateData(); ?>vkY^/  
 UCHAR mask=0; {BaPK&x,  
 UCHAR key=0; =T?Xph{  
 if(m_bControl) i??+5o@uTF  
  mask|=4; c*" P+  
 if(m_bAlt) Ag2Q!cq  
  mask|=2; H/8u?OC  
 if(m_bShift) (R RRG;*n#  
  mask|=1; 6!*zgA5M'  
  key=Key_Table[m_Key.GetCurSel()]; j/E(*Hv  
 if(bRegistered){ J\'f5)k  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); h2:TbQ  
  bRegistered=FALSE; Bqk+ne  
 } <+b~E,  
 cMask=mask; !A|}_K1Cr  
 cKey=key; JPj/+f  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); %.\+j,G7  
 return bRegistered; >Kl_948  
} 1 un!  
=i7CF3  
  四、小结 16.?4 5  
>Apa^Bp  
  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:
10+5=?,请输入中文答案:十五