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
  • 5615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: wtSU43D  
  WYF8?1dt +  
  一、实现方法 .f0qgmIyL  
.WKJ37od  
  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: aHC%:)ww:  
7~J>Ga  
#pragma data_seg("shareddata") Il4]1d|  
HHOOK hHook =NULL; //钩子句柄 I(7 GVYM  
UINT nHookCount =0; //挂接的程序数目 Q&PWW#D  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 (z8ZCyq7r[  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 g%= K rO  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey 5|0/$ SWd*  
static int KeyCount =0; ch%zu%;f  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 c`x4."m  
#pragma data_seg() ]v}W9{sY  
vTFG*\Cq  
  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。 ?@PSD\  
P9m  
  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: <D:q4t  
hzk!H]>E  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR >'Lkn2WI  
cKey,UCHAR cMask) UH0l8ixc  
{ XK\nOHLS  
 BOOL bAdded=FALSE; 9=$ pV==  
 for(int index=0;index<MAX_KEY;index++){ Uu8ayN j  
  if(hCallWnd[index]==0){ d)U(XiK'  
   hCallWnd[index]=hWnd; xGr{ad.N  
   HotKey[index]=cKey; jA{B G_  
   HotKeyMask[index]=cMask; XM5)|D  
   bAdded=TRUE; 6<@+J  
   KeyCount++; K:-jn}i?/  
   break; Tv'1IE  
  } e8f 7*S8  
 } /"="y'Wx  
 return bAdded; Z1 )1s  
} v&G9HiH  
//删除热键 c.1gQy$}|  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) E> pr})^w  
{ qF^P\cD  
 BOOL bRemoved=FALSE; 8J&9}@y  
 for(int index=0;index<MAX_KEY;index++){ vh&~Y].W Y  
  if(hCallWnd[index]==hWnd){ p @q20>^u  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ q p}2  
    hCallWnd[index]=NULL; CR.d3!&28  
    HotKey[index]=0; &+02Sn3A  
    HotKeyMask[index]=0; [<d ~b*/  
    bRemoved=TRUE; L"vk ^>E6  
    KeyCount--; ?glx8@  
    break; N:Q.6_%^  
   } !Z>,dN  
  } 0TV16 --  
 } :RIqA/  
 return bRemoved; v -)<nox  
} Mu:zWLM*M  
yj'lHC  
> .}G[C  
  DLL中的钩子函数如下: "qC3%9e  
<,p$eQ)T%  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) X&aQR[X  
{  *`qI<]!  
 BOOL bProcessed=FALSE; jqvw<+#  
 if(HC_ACTION==nCode) }8l+Jd3"  
 { % +  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 ueU"v'h\  
   switch(wParam) rZ.=Lq  
   {  E$8-8[  
    case VK_MENU: 4e\wC  
     MaskBits&=~ALTBIT; ubZuvWZ  
     break; 65@GXn[W_  
    case VK_CONTROL: a'-xCV|^  
     MaskBits&=~CTRLBIT; D`Vb3aNB=L  
     break; SF:{PgGMi  
    case VK_SHIFT: 8hy1yt6t4~  
     MaskBits&=~SHIFTBIT; HQ=pf >  
     break; &<#1G u_  
    default: //judge the key and send message ~7j-OWz9  
     break; 1Zk1!> ?  
   } ()8=U_BFz  
   for(int index=0;index<MAX_KEY;index++){ <l,e6K  
    if(hCallWnd[index]==NULL) NR&a er  
     continue; MW^FY4V1m  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) B ( h`~pb  
    { hC{2LLu;n  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); ~FI} [6Dd  
     bProcessed=TRUE; 8KP   
    } |9 *$6Y  
   } yTbtS-  
  } vm*9xs  
  else if((lParam&0xc000ffff)==1){ //有键按下 bZK`]L[   
   switch(wParam) /^{Q(R(X<  
   { ^cW{%R>XY  
    case VK_MENU: =$~x]  
     MaskBits|=ALTBIT; S=< ]u  
     break; #0*I|gfV  
    case VK_CONTROL: cbou1Ei   
     MaskBits|=CTRLBIT; nf _(_O=  
     break; z-0 N/?x1  
    case VK_SHIFT: t':*~b{V@7  
     MaskBits|=SHIFTBIT; GQ.akA_(  
     break; *x#5S.i1  
    default: //judge the key and send message PMQ31f/zf  
     break; <;+QK=f  
   } P:'y}a-  
   for(int index=0;index<MAX_KEY;index++){ uY3$nlhP6  
    if(hCallWnd[index]==NULL) 1Ogtzf  
     continue; =&4eW#{LuH  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) ;SA+| ,  
    { A1zV5-E/  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); \n#l+R23  
     bProcessed=TRUE; RC"xnnIJv  
    } xU.Ymq& 5  
   } 7S&O {Q7)  
  } B%[#["Ol  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 Ax!@vL&@  
   for(int index=0;index<MAX_KEY;index++){ E9 #o0Di  
    if(hCallWnd[index]==NULL) u4=ulgi  
     continue; | ~D~#Nz  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) kmfz.:j{  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); pek5P4W_  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 nM$-L.dG  
   } |@>Zc5MY$  
  } MhFj>t   
 } :e_yOT}}  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); 5= MM^$QG  
} jI}{0LW&F&  
[S`Fm>,  
  抓图程序是一个基于对话框的程序,它在建立对话框的时候调用前面的DLL,登记热键,因此需要将hook.lib添加到工程里,在程序里给出两个DLL函数的定义,也可以写个头文件,再包含进来以下代码: OJcI0(G  
,n5 [Y)  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); Zr\G=0`  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); OHF:E44k  
sD XJXJZ  
  为了添加应用程序对热键通知事件的响应,程序中用的办法是重载WindowProc()函数,该函数代码如下: c%n%,R>  
.|kp`-F51  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) BxxqzN+  
{ \HJt}  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) T:j!a{_|  
 { pHDPj,lu  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 zpxy X|  
  SaveBmp(); ~Oj-W6-+&,  
  return FALSE; N;,N6&veK/  
 } ZcN%F)htm  
 …… //其它处理及默认处理 oP<E)  
} eY$Q}BcW  
o648 xUP  
GZFLJu  
  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。 fAR0GOI  
vC5 (  
  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。 MdNV3:[\  
w+ibY  
  二、编程步骤 }xzbg  
~hA;ji|I  
  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"; f['pHR%l2$  
W&k2z,|  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; PmE2T\{s!  
N(&/ Ud  
  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; [Hp"a^~r|  
G|]39/OO3{  
  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; w~9=6|_  
{I_I$x_  
  5、 添加代码,编译运行程序。 h5#V,$  
y {1p#  
三、程序代码 nxYp9,c"  
!g-19at  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL EabZ7zFoN  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) +4p gPv  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ ~dqEUu!C  
#if _MSC_VER > 1000 MU&P+Wr  
#pragma once bPdbKi{j@  
#endif // _MSC_VER > 1000 ut^^,w{o>  
#ifndef __AFXWIN_H__ thSo,uGlW  
#error include 'stdafx.h' before including this file for PCH uO`YA]  
#endif "Q@ZS2;A  
#include "resource.h" // main symbols !tD,phca~  
class CHookApp : public CWinApp AfW9;{j&I  
{ V0WFh=CM@  
 public: ]hkway  
  CHookApp(); FmRa]31W  
  // Overrides  hG!"e4  
  // ClassWizard generated virtual function overrides u kKp,1xz  
  //{{AFX_VIRTUAL(CHookApp) #(NkbJ5ka  
 public: nK9A=H'Hc  
  virtual BOOL InitInstance(); vl}uHdeP9  
  virtual int ExitInstance(); pn~$u  
  //}}AFX_VIRTUAL ^E8eW  
  //{{AFX_MSG(CHookApp) pYs"Y;%  
  // NOTE - the ClassWizard will add and remove member functions here. 3l@={Ts  
  // DO NOT EDIT what you see in these blocks of generated code ! q y8=4~40  
  //}}AFX_MSG bP 2IX  
  DECLARE_MESSAGE_MAP() P}QuGy[  
}; !>+Na~eN  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); +H L]t'UEg  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); DNaU mz  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); Ci ? +Sl  
BOOL InitHotkey(); Qy@r&  
BOOL UnInit(); |f0KIb}d  
#endif WV"{oED  
8V(#S :G35  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. "syf@[tz7  
#include "stdafx.h" v(t?d  
#include "hook.h" 0:(@Y  
#include <windowsx.h> 7Jm9,4]  
#ifdef _DEBUG >p 7e6%  
#define new DEBUG_NEW ~l@SGHx  
#undef THIS_FILE AjZ@hid  
static char THIS_FILE[] = __FILE__; c.PPVqx  
#endif a[GlqaQy+-  
#define MAX_KEY 100 h&vq}  
#define CTRLBIT 0x04 q<b;xx  
#define ALTBIT 0x02 vxo iPqo  
#define SHIFTBIT 0x01 /*lSpsBn  
#pragma data_seg("shareddata") @3K 4,s  
HHOOK hHook =NULL; HBL)_c{/O  
UINT nHookCount =0; F3b[L^Km]  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey bd2"k;H<o  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT P$\vD^  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey <5~} !N X`  
static int KeyCount =0; ET`;TfqM  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift xXu/CGzG  
#pragma data_seg() }IGr%C(3%  
HINSTANCE hins; RCq_FY  
void VerifyWindow(); #$Z|)i]w  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) O(otI-Lc  
//{{AFX_MSG_MAP(CHookApp) ?K/z`E!xhN  
// NOTE - the ClassWizard will add and remove mapping macros here. ht S5<+Y  
// DO NOT EDIT what you see in these blocks of generated code! 4 |N&Y  
//}}AFX_MSG_MAP $N=A,S  
END_MESSAGE_MAP() Dg@>d0FW  
y@G5I>v  
CHookApp::CHookApp() %97IXrE  
{ D;|4ZjM-  
 // TODO: add construction code here, swnov[0  
 // Place all significant initialization in InitInstance o=2y`Eq  
} ?/~7\ '|Z  
d]k >7.  
CHookApp theApp; 52>?l C  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) pVw)"\S%  
{ ^=wG#!#V"1  
 BOOL bProcessed=FALSE; rj*4ZA?  
 if(HC_ACTION==nCode) 8+uwzBNZ:  
 { Y2w 9]:J  
  if((lParam&0xc0000000)==0xc0000000){// Key up Db= iJ68  
   switch(wParam) ewk62 {  
   { /cr.}D2O  
    case VK_MENU: UPPDs"  
     MaskBits&=~ALTBIT; Vcl"qz@Fj  
     break; >b |l6 #%  
    case VK_CONTROL: xk}YeNVj  
     MaskBits&=~CTRLBIT; ~/h P6*  
     break; o;\0xuM@  
    case VK_SHIFT: 2HMlh.R(C  
     MaskBits&=~SHIFTBIT; {JzX`Z30l  
     break; 'UT 4x9&z  
    default: //judge the key and send message Kig.hHj@  
     break; Q/=L(_1l  
   } Ni{ (=&*=  
   for(int index=0;index<MAX_KEY;index++){ RIM"MR9qe=  
    if(hCallWnd[index]==NULL) ,l` q  
     continue; >\$qF  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) abCcZ<=|b  
    { aIZ@5w"7  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); zie])_8|h  
     bProcessed=TRUE; '\ dFhYs{*  
    } xZL`<3?  
   } >NW /0'/  
  } M\8FjJ>9  
  else if((lParam&0xc000ffff)==1){ //Key down /U6G?3b  
   switch(wParam) 'e\m6~u\hm  
   { ^`\c;!)F<  
    case VK_MENU: v)+wr[Qs  
     MaskBits|=ALTBIT; wr8n*Du  
     break; #=b_!~:%  
    case VK_CONTROL: l0u6nGkh  
     MaskBits|=CTRLBIT; MlsF?"H p  
     break; o'%F*>#v  
    case VK_SHIFT: As1Er[>  
     MaskBits|=SHIFTBIT; l8%x(N4  
     break; M{:gc7%  
    default: //judge the key and send message ,ibI@8;#~'  
     break; dt) BMF8  
   } +:~&"U^ z&  
   for(int index=0;index<MAX_KEY;index++) jfS?#;T)  
   { }vxb, [#  
    if(hCallWnd[index]==NULL) [FC7+ Ey^  
     continue; 7|T5N[3?l,  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) @C7S^|eo  
    { McxJ C<  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); r[ ' T.yo  
     bProcessed=TRUE; naXo < B  
    } JXGIVH?Rpu  
   } av gGz8  
  } WMZa6cH  
  if(!bProcessed){ HQaKG4Z  
   for(int index=0;index<MAX_KEY;index++){ zY\v|l<T  
    if(hCallWnd[index]==NULL) _1dG!!L_  
     continue; IL}pVa00{n  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) H[<"DP  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); -t?S:9 [w  
   } q uv`~qn  
  } bI@+Or  
 } 7l7eUy/z  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); \"_;rJ{!aE  
} /+sn -$/"i  
?;|$R   
BOOL InitHotkey() aAwnkQ$  
{ ?Hf^& yo  
 if(hHook!=NULL){ doP4N6   
  nHookCount++; @+ Berb  
  return TRUE; ~0|~Fg  
 } )(\5Wk9(  
 else A,lcR:@w  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); }&rf'E9  
  if(hHook!=NULL) U v[:Aj  
   nHookCount++; 7u!R 'D  
  return (hHook!=NULL); }^?dK3~q  
} 5D-xm$8C  
BOOL UnInit() K,|Gtaa~  
{ vV#Jl) A  
 if(nHookCount>1){ T {(6*^g<B  
  nHookCount--; 15 uVvp/  
  return TRUE; i{T0[\4  
 } {NKDmeg:D  
 BOOL unhooked = UnhookWindowsHookEx(hHook); - CT?JB  
 if(unhooked==TRUE){ RX=C)q2c  
  nHookCount=0; !F;W#Gc  
  hHook=NULL; z mrk`o~  
 } mmTc.x h  
 return unhooked; ,, ]y 8P  
} tV*g1)'zX  
*ta|,  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) > g8;x#  
{ x nWapG  
 BOOL bAdded=FALSE; OjE wJ$$  
 for(int index=0;index<MAX_KEY;index++){ WsJ3zZc  
  if(hCallWnd[index]==0){ #R305  
   hCallWnd[index]=hWnd; 0}PW?t76  
   HotKey[index]=cKey; 0D|^S<z6  
   HotKeyMask[index]=cMask; vay_QxB5  
   bAdded=TRUE; 3UD_2[aqN(  
   KeyCount++; vsqfvx  
   break; /Kwo^Q{  
  } uzho>p[ae  
 } L;fhJ~ r  
 return bAdded; D>?%p"e  
} ]8d]nftY  
Nypa,_9}  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) H:,rNaz7D^  
{ K$ #(\-M  
 BOOL bRemoved=FALSE; -7'>Rw  
 for(int index=0;index<MAX_KEY;index++){ 22}J.'Zb  
  if(hCallWnd[index]==hWnd){ yFl@ z  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ 46Nl];g1`  
    hCallWnd[index]=NULL; j@ UIN3  
    HotKey[index]=0; u{ JAC!  
    HotKeyMask[index]=0; s7(mNpo  
    bRemoved=TRUE; .FqbX5\p,  
    KeyCount--; 4 FGcCE3  
    break; =MB[v/M59w  
   } ~BrERUk  
  } 4@/[aFH  
 } g>/,},jv[x  
 return bRemoved; /XS}<!)%  
} :f 1*-y  
"CT'^d+  
void VerifyWindow() xo6-Y=c8  
{ k~`pV/6  
 for(int i=0;i<MAX_KEY;i++){ `L]cJ0tAs  
  if(hCallWnd!=NULL){ o" &7$pAh  
   if(!IsWindow(hCallWnd)){ XlV#)JX  
    hCallWnd=NULL; u~bk~ 3.I  
    HotKey=0; Dx4?6  
    HotKeyMask=0; w%S\)wjS  
    KeyCount--; \a<qI  
   } \gDf&I  
  } Br`Xw^S  
 } < :<E~anH  
} #=OKY@z/  
]A5FN4 E  
BOOL CHookApp::InitInstance() uPr@xff  
{ +a"MSPC4w  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); Z8z.Xn  
 hins=AfxGetInstanceHandle(); U $# ?Lw  
 InitHotkey(); 9=ns.r  
 return CWinApp::InitInstance(); U;`N:~|p#  
} wta\C{{  
VI74{='=  
int CHookApp::ExitInstance() % E3  
{ )_,*2|b  
 VerifyWindow(); Nm\0>}  
 UnInit(); ,gUSW  
 return CWinApp::ExitInstance(); &UEr4RK;I  
} c/^} =t(  
W[AX?  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file l"f.eo0@7  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) brl(7_ 2  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ .Quu_S_ vH  
#if _MSC_VER > 1000 i,8h B(M!  
#pragma once i 'H{cN6  
#endif // _MSC_VER > 1000 P5P:_hr  
E2Q;1Re@  
class CCaptureDlg : public CDialog 3PIZay  
{ FF0N{bY  
 // Construction z4HIDb  
 public: V\W?@V9g-  
  BOOL bTray; Zz!XH8sH  
  BOOL bRegistered; /a [i:Oa#  
  BOOL RegisterHotkey(); ;ug& v C  
  UCHAR cKey; A0m  
  UCHAR cMask; :rk=(=@8`  
  void DeleteIcon(); Y}&//S A  
  void AddIcon(); yS[:C 2v  
  UINT nCount; }TzMWdT  
  void SaveBmp(); zq>pK_WG  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor ~pO6C*"  
  // Dialog Data YiJnh47  
  //{{AFX_DATA(CCaptureDlg) 8`v+yHjG  
  enum { IDD = IDD_CAPTURE_DIALOG }; !trt]?*-  
  CComboBox m_Key; !g  #  
  BOOL m_bControl; Q>8F&p?R  
  BOOL m_bAlt; [a:yKJ[  
  BOOL m_bShift; 0M7Or)qN  
  CString m_Path; B8F.}M-!  
  CString m_Number; t3|If@T  
  //}}AFX_DATA jVC`38|  
  // ClassWizard generated virtual function overrides !8lG"l|,l  
  //{{AFX_VIRTUAL(CCaptureDlg) %PRG;kR  
 public: ea kj>7\s  
  virtual BOOL PreTranslateMessage(MSG* pMsg); t~H'Ugv^  
 protected: ##+|zka!U  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support PIR#M('  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); ROlef;/A  
  //}}AFX_VIRTUAL G0oY`WXOB  
  // Implementation "(zvI>A  
 protected: #tg,%*.s  
  HICON m_hIcon; DDxbIkt  
  // Generated message map functions x' >Nz{B,P  
  //{{AFX_MSG(CCaptureDlg) o=}}hE\H  
  virtual BOOL OnInitDialog(); Xb?:dlu3  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); >L\$  
  afx_msg void OnPaint(); t2skg  
  afx_msg HCURSOR OnQueryDragIcon(); !~Gx@Ro  
  virtual void OnCancel(); UF0W%Z  
  afx_msg void OnAbout(); " !F)K  
  afx_msg void OnBrowse(); Ir&rTGFN  
  afx_msg void OnChange(); sL" h  
 //}}AFX_MSG @ol=gBU  
 DECLARE_MESSAGE_MAP() *`2.WF@E)  
}; 5b>-t#N,  
#endif  yY_(o]k  
#hG0{_d7  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file O'm><a>8  
#include "stdafx.h" %IrR+f+H  
#include "Capture.h" eRU0gvgLu"  
#include "CaptureDlg.h" i[_ (0P+Da  
#include <windowsx.h> > %h7)}U  
#pragma comment(lib,"hook.lib") % `Q[?(z  
#ifdef _DEBUG /kV3[Rw+  
#define new DEBUG_NEW Zk,` Iq  
#undef THIS_FILE P 4Vi~zMX  
static char THIS_FILE[] = __FILE__; O AJGwm  
#endif rQmDpoy=  
#define IDM_SHELL WM_USER+1 B7 PkCS&X  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); [.J&@96,b  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); ,;;7+|`  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; NwAvxN<R(f  
class CAboutDlg : public CDialog qE B3Y54+  
{ -#<6  
 public: v: \8  
  CAboutDlg(); ffoL]u\  
  // Dialog Data <A|X4;  
  //{{AFX_DATA(CAboutDlg) ~o{GQ>  
  enum { IDD = IDD_ABOUTBOX }; eS#kDa/ %  
  //}}AFX_DATA PLD&/SgP*  
  // ClassWizard generated virtual function overrides SnIH6k0T_  
  //{{AFX_VIRTUAL(CAboutDlg) f>*T0"\c  
 protected: NSe H u k  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support qt_ocOr  
  //}}AFX_VIRTUAL UWU(6J|Fk  
  // Implementation q4u,pm,@  
 protected: w O H{L  
  //{{AFX_MSG(CAboutDlg) +85#`{ D  
  //}}AFX_MSG Nq]8p =e  
  DECLARE_MESSAGE_MAP() d}D%%noIu  
}; zT<fTFJ1  
I=aoP}_  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) .8o?`  
{ z$g cK>@l  
 //{{AFX_DATA_INIT(CAboutDlg) y;Ez|MS   
 //}}AFX_DATA_INIT hcn $uyP  
} 6HroKu  
9S 'u 1%  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) Cws;6i*=@  
{ V52>K$j  
 CDialog::DoDataExchange(pDX); F}1h  
 //{{AFX_DATA_MAP(CAboutDlg) EPEWyGw  
 //}}AFX_DATA_MAP 8y:/!rRN  
} 7gWT[  
-VZn`6%s  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) 5D]3I=kj  
 //{{AFX_MSG_MAP(CAboutDlg) TxJoN]Z.  
 // No message handlers 0Q7teXRM  
 //}}AFX_MSG_MAP k8KRVXgx  
END_MESSAGE_MAP() @},|i*H/  
9sP;s^#t7U  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) &9Y ^/W  
: CDialog(CCaptureDlg::IDD, pParent) N5PW]  
{ dU}Cb?]7s  
 //{{AFX_DATA_INIT(CCaptureDlg) m+UWvUB)  
  m_bControl = FALSE; y^!>'cdV  
  m_bAlt = FALSE; ]I,(^Xq3a(  
  m_bShift = FALSE; }VU^ 8D  
  m_Path = _T("c:\\"); C/$bgK[ev  
  m_Number = _T("0 picture captured."); 8H'ybfed  
  nCount=0; U g:  
  bRegistered=FALSE; jKh:}yl4  
  bTray=FALSE; }_/]f!]  
 //}}AFX_DATA_INIT !dQmg'_V  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 ?rm3Iac0S  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); 4,,DA2^!  
} ,.kJF4s&  
K`=9"v'f+  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) 0g 2?  
{ Iuyq!R4:7  
 CDialog::DoDataExchange(pDX); zq6)jHfq.  
 //{{AFX_DATA_MAP(CCaptureDlg) Z~0TO-Q  
  DDX_Control(pDX, IDC_KEY, m_Key); vp32}ze D  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); b(IZ:ekZ5  
  DDX_Check(pDX, IDC_ALT, m_bAlt); (himx8Uml2  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); u^O!5 'D%  
  DDX_Text(pDX, IDC_PATH, m_Path); v9\U2j  
  DDX_Text(pDX, IDC_NUMBER, m_Number); Ucx"\/"  
 //}}AFX_DATA_MAP 4wMZNa<Sx  
} #<LJns\t   
$:?Dyu(Il  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) vfd<qdi3p(  
//{{AFX_MSG_MAP(CCaptureDlg) /0swrt.  
 ON_WM_SYSCOMMAND() o;9 G{Xj3@  
 ON_WM_PAINT() 7lx" X0w*m  
 ON_WM_QUERYDRAGICON() {Gr"lOi*@  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) z`qb>Y"xf3  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) i]#"@xQ  
 ON_BN_CLICKED(ID_CHANGE, OnChange) Z2U6<4?1%  
//}}AFX_MSG_MAP (@1>G ^%  
END_MESSAGE_MAP() |KR8=-!7  
lak,lDt]  
BOOL CCaptureDlg::OnInitDialog() PNz]L  
{ x?UAj8z6  
 CDialog::OnInitDialog(); { 2%'=v  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); _l"=#i@L  
 ASSERT(IDM_ABOUTBOX < 0xF000); rB|1<jR  
 CMenu* pSysMenu = GetSystemMenu(FALSE); vX7U|zy  
 if (pSysMenu != NULL) ;reBJk  
 { !kG|BJ$j  
  CString strAboutMenu; t~H0Qeb[v=  
  strAboutMenu.LoadString(IDS_ABOUTBOX); )oALB vX  
  if (!strAboutMenu.IsEmpty()) =]r2;014  
  { =P9Tc"2PN  
   pSysMenu->AppendMenu(MF_SEPARATOR); q@G}Hjn  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); MQQQaD:v  
  } }rvX}   
 } =9Vo[  
 SetIcon(m_hIcon, TRUE); // Set big icon r$1b=m,0d  
 SetIcon(m_hIcon, FALSE); // Set small icon 4ClSl#X#i  
 m_Key.SetCurSel(0); C2aA])7 D  
 RegisterHotkey(); Q #X'.](1  
 CMenu* pMenu=GetSystemMenu(FALSE); v, CWE  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); A^E 6)A=  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); r#A*{4wz  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); m68>`  
 return TRUE; // return TRUE unless you set the focus to a control '6kD6o_p1  
} ^AShy`o^X  
%Z+**>1J  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) PqIskv+  
{ A/"<o5(T(P  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) }= wor~  
 { !PA><F  
  CAboutDlg dlgAbout; 0~z`>#W,  
  dlgAbout.DoModal(); d-C%R9  
 } $|g ;  
 else gAh#H ?MM  
 { {{Qbu }/@  
  CDialog::OnSysCommand(nID, lParam); b9ud8wLE[  
 } l1#.r g  
} L|Xg4Z  
hH9~.4+*`g  
void CCaptureDlg::OnPaint() +J85Re `  
{ 5A$,'%d  
 if (IsIconic()) OTGy[jY"  
 { /N({"G'  
  CPaintDC dc(this); // device context for painting c|d,:u#  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); '7pzw>E=:  
  // Center icon in client rectangle U{KnjoS  
  int cxIcon = GetSystemMetrics(SM_CXICON); Vo6+|ztk|  
  int cyIcon = GetSystemMetrics(SM_CYICON); )+"5($~  
  CRect rect; aM xd"cTzx  
  GetClientRect(&rect); UdVf/ PGx  
  int x = (rect.Width() - cxIcon + 1) / 2; [!>9K}z,=  
  int y = (rect.Height() - cyIcon + 1) / 2; n!.=05OtX  
  // Draw the icon DSRmFxkk  
  dc.DrawIcon(x, y, m_hIcon); L }3eZ-  
 } }a/z.&x]V  
 else 'Hzc"<2Y\  
 { 6O/c%1VHA3  
  CDialog::OnPaint(); IBvn q8\  
 } nbB*d@"  
} |d z2Drc  
i6A9|G$H  
HCURSOR CCaptureDlg::OnQueryDragIcon() a'`?kBK7`U  
{ Ch3MwM5]  
 return (HCURSOR) m_hIcon; K@JaN/OM  
} ahIDKvJ4  
|V4<eF-0S  
void CCaptureDlg::OnCancel() o ^ \+Ua  
{ Mvue>)g~>  
 if(bTray) @e&0Wk  
  DeleteIcon();  VM:|I~gJ  
  CDialog::OnCancel(); j:qexhtho  
} SB08-G2  
)#8g<]q  
void CCaptureDlg::OnAbout() g~b$WV%  
{ @ZjO#%Ep/  
 CAboutDlg dlg; 6-uLK'E  
 dlg.DoModal(); c{dabzL y  
} .j&#  
jVLJ qWP'!  
void CCaptureDlg::OnBrowse() /M::x+/T  
{ A^p{Cq@E  
 CString str; q*4U2_^.  
 BROWSEINFO bi; ~ +>e hU  
 char name[MAX_PATH]; P[-do  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); _~MX~M3MB  
 bi.hwndOwner=GetSafeHwnd(); -Ci&h  
 bi.pszDisplayName=name; f>$RR_  
 bi.lpszTitle="Select folder"; fN&uat7  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; JBLUX,  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); b- e  
 if(idl==NULL) Ncsh{.  
  return; ."=p\:^j*  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); 0M roHFh9`  
 str.ReleaseBuffer(); [>r0 (x&.  
 m_Path=str; 0ug&HEl_w  
 if(str.GetAt(str.GetLength()-1)!='\\') AoOA.t6RVo  
  m_Path+="\\"; qB,0(I1-!  
 UpdateData(FALSE); enZZ+|h  
} cV0CI&  
4oH ,_sr  
void CCaptureDlg::SaveBmp() (xN1?qXB.  
{ :UP8nq  
 CDC dc; 0+$gR~^^  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); d23=WNn  
 CBitmap bm; z'$1$~I  
 int Width=GetSystemMetrics(SM_CXSCREEN); U|Gy9"  
 int Height=GetSystemMetrics(SM_CYSCREEN); PU,$YPrZ  
 bm.CreateCompatibleBitmap(&dc,Width,Height); hm d3W`8D  
 CDC tdc; 6 iMJ0  
 tdc.CreateCompatibleDC(&dc); Dol{y=(3e  
 CBitmap*pOld=tdc.SelectObject(&bm); DBB&6~;?  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); UWqD)6  
 tdc.SelectObject(pOld); tE {M  
 BITMAP btm; e2N K7  
 bm.GetBitmap(&btm); .?Y"o3  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; ^d{5GK'  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); -,b+tC<V)0  
 BITMAPINFOHEADER bih; ;s{' cN[.  
 bih.biBitCount=btm.bmBitsPixel; d?J&mLQ6  
 bih.biClrImportant=0; ~gff{Nzk  
 bih.biClrUsed=0; fV5$[CL1  
 bih.biCompression=0; |u^S}"@3sU  
 bih.biHeight=btm.bmHeight; 5|*`} ;/y  
 bih.biPlanes=1; &e:+;7  
 bih.biSize=sizeof(BITMAPINFOHEADER); aK - x{  
 bih.biSizeImage=size; vg[3\!8z[  
 bih.biWidth=btm.bmWidth; qf\W,SM  
 bih.biXPelsPerMeter=0; 1u7D:h>#  
 bih.biYPelsPerMeter=0; `MuX/ [q  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); CN:T$ f|)  
 static int filecount=0;  [. 9[?8  
 CString name; 1J/'R37lP  
 name.Format("pict%04d.bmp",filecount++); QwWd"Of  
 name=m_Path+name; ty.$ H24  
 BITMAPFILEHEADER bfh; 7]zZdqG&p`  
 bfh.bfReserved1=bfh.bfReserved2=0; <MkvlLu((o  
 bfh.bfType=((WORD)('M'<< 8)|'B'); Vez8 ~r3  
 bfh.bfSize=54+size; F[Mwd &P@  
 bfh.bfOffBits=54; fxPg"R!1i  
 CFile bf; 2<I=xWwFA  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ #8"oqqYi  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); A| A#|D  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); -Q@f),  
  bf.WriteHuge(lpData,size); -'d:~:1f  
  bf.Close(); >bze0`}Z  
  nCount++; 0t^FM<7G  
 } 0Q&(j7`^@  
 GlobalFreePtr(lpData); *YeQC t-l  
 if(nCount==1) {@)ZXg  
  m_Number.Format("%d picture captured.",nCount); 94ruQ/  
 else k Alx m{  
  m_Number.Format("%d pictures captured.",nCount); *}lLV.+A  
  UpdateData(FALSE); [QgP6f]=  
}  )^{}ov  
|*NZ^6`@  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) )/>BgXwH  
{ sb{K%xi%  
 if(pMsg -> message == WM_KEYDOWN) !P=Cv=  
 { VZWo.Br'W  
  if(pMsg -> wParam == VK_ESCAPE) =b:XL#VA  
   return TRUE; ,.QJ S6Yv  
  if(pMsg -> wParam == VK_RETURN) d2#NRqgQ  
   return TRUE; e7@ m i  
 } /ki-Tha  
 return CDialog::PreTranslateMessage(pMsg); +:;ddV  
} s%K(hk  
dz([GP'-*  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) ?QT6q]|d0+  
{ "x=\mA#`  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ fF0i^E<  
  SaveBmp(); ;(/go\m tB  
  return FALSE; N,Ma\D+^t  
} p  lnH  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ ]A=\P,D  
 CMenu pop; 3Xu|hkK\e  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); 6(`N!]e*L  
 CMenu*pMenu=pop.GetSubMenu(0); <N=k&\  
 pMenu->SetDefaultItem(ID_EXITICON); ,7&\jET5^0  
 CPoint pt; js81@WX!c  
 GetCursorPos(&pt); tjx8 UgSi  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); 3?*d v14  
 if(id==ID_EXITICON) ~k?rP}>0  
  DeleteIcon(); .u&xo{$'dS  
 else if(id==ID_EXIT) (O0Ry2u k  
  OnCancel(); ]64}Xob87_  
 return FALSE; Bgm8IK)6  
} ~T RC-H  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); V )<>W_g  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) [G|.  
 AddIcon(); +ausm!~6  
 return res; I </P_:4G  
} f $Agcy  
'OtT q8G  
void CCaptureDlg::AddIcon() fAULuF  
{ -`k>(\Q< d  
 NOTIFYICONDATA data;  9Bt GzI\  
 data.cbSize=sizeof(NOTIFYICONDATA); )sm9%|.&  
 CString tip; NlEyT9  
 tip.LoadString(IDS_ICONTIP); f1_;da  
 data.hIcon=GetIcon(0); M#'7hm6  
 data.hWnd=GetSafeHwnd(); o7!A(Eu  
 strcpy(data.szTip,tip); =IMmtOvJ  
 data.uCallbackMessage=IDM_SHELL; aA|{r/.10K  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; ]AY 4bm  
 data.uID=98; lz0-5z+\  
 Shell_NotifyIcon(NIM_ADD,&data); tw$EwNI[  
 ShowWindow(SW_HIDE); iP(MDVg  
 bTray=TRUE; Ep;uz5 ^8  
} uQO5GDuK>  
&gXL{cK'%  
void CCaptureDlg::DeleteIcon() Mgw#4LU  
{ 1 7~Pc  
 NOTIFYICONDATA data; ,zoHmV1Wd+  
 data.cbSize=sizeof(NOTIFYICONDATA); }+KM"+@$<  
 data.hWnd=GetSafeHwnd(); Z {^!z  
 data.uID=98; s9wzN6re  
 Shell_NotifyIcon(NIM_DELETE,&data); -t4:%-wv  
 ShowWindow(SW_SHOW); MF"*xr v  
 SetForegroundWindow(); S5hc@^|0Z  
 ShowWindow(SW_SHOWNORMAL); arm_SyL0  
 bTray=FALSE; K]m#~J3d>  
} s=jmvvs_V}  
[}4zqY{  
void CCaptureDlg::OnChange() #g6_)B=S  
{ H2jypVs$2  
 RegisterHotkey(); A5Jadz~  
} Dr.eos4 ~  
; pBLmm*F  
BOOL CCaptureDlg::RegisterHotkey() u;t<rEC2  
{ 1 Gr^,Ry  
 UpdateData(); -KGJr  
 UCHAR mask=0; j-1V,V=  
 UCHAR key=0; ~%*l>GkP*  
 if(m_bControl) U%@PY9#  
  mask|=4; ">Qxb.Y}  
 if(m_bAlt) PL= v,NB  
  mask|=2; vb~%u;zrC@  
 if(m_bShift) ;&j'`tP  
  mask|=1; *,X)tZ6VX  
  key=Key_Table[m_Key.GetCurSel()]; wnX;eU/n  
 if(bRegistered){ viG=Ap.Th  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); > V(C>^%->  
  bRegistered=FALSE; R9A:"sJ  
 } epnZGz,A  
 cMask=mask; mHMsK}=~  
 cKey=key; .vKgiIC:  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); r !!uA1!7  
 return bRegistered; 7%"|6dw  
} U=D;Cj Ah  
B@-\.m  
  四、小结 7RUztu\_  
Ye On   
  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:
10+5=?,请输入中文答案:十五