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
  • 5318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: X#p E!mT  
  .=K@M"5&  
  一、实现方法 G8<,\mg+  
/r]IY.  
  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: WAob"`8]  
Ao=.=0os  
#pragma data_seg("shareddata") ^(a%B  
HHOOK hHook =NULL; //钩子句柄 lJ}lO,g  
UINT nHookCount =0; //挂接的程序数目 ;zp0,[r  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 g y&B"`  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 4wK!)Pwq  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey WF:i}+g+^  
static int KeyCount =0; G-T:7  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 y&SueU=  
#pragma data_seg() \E0Uj>9+[  
L.erP* w  
  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。 'GNT'y_  
[S*bN!t  
  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: ^S[Mg6J  
PiM@iS  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR zQD$+q5h  
cKey,UCHAR cMask)  4INO .  
{ F7L+bv   
 BOOL bAdded=FALSE; :,:r  
 for(int index=0;index<MAX_KEY;index++){ ` NcWy  
  if(hCallWnd[index]==0){ NPKRX Li%  
   hCallWnd[index]=hWnd; U?H!:?,C  
   HotKey[index]=cKey; _ea!psA0  
   HotKeyMask[index]=cMask; Nno*X9>~  
   bAdded=TRUE; )Ibp%'H  
   KeyCount++; =cg0o_q8  
   break; 1'Kn:I  
  } uE+]]ir  
 } J6|5*|*^  
 return bAdded; {aAA4.j^  
} K~C*4H:9  
//删除热键 elw<(<u`  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) Z9TG/C,eo  
{ Rl-Sr  
 BOOL bRemoved=FALSE; @-)?2CH[8  
 for(int index=0;index<MAX_KEY;index++){ ,LU/xI0O  
  if(hCallWnd[index]==hWnd){ RXLD5$s^  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ CYs:P8^  
    hCallWnd[index]=NULL; mVW:]|!s  
    HotKey[index]=0; %5a>@K]  
    HotKeyMask[index]=0; Ean@GDLz8  
    bRemoved=TRUE; YW0UIO  
    KeyCount--; :X/j%m*  
    break; 1_*o(HR  
   } !SEg4z  
  } Svy bP&i|  
 } BEN=/ v  
 return bRemoved; c`AtK s)u  
} WOR~tS  
leX&py  
*N<~"D  
  DLL中的钩子函数如下: hb zU?_}  
;#cb%e3  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) ZB<goEg  
{ WHMt$W}%  
 BOOL bProcessed=FALSE; KK}^E_v  
 if(HC_ACTION==nCode) i5q VQo  
 { wjQu3 ,Cj  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 ojUBa/  
   switch(wParam) j:\MrYt0H  
   {  9:IVSD&"Rf  
    case VK_MENU: GnkNoaU  
     MaskBits&=~ALTBIT; jL>IX`,+6  
     break; 8?h-H #h  
    case VK_CONTROL: +P81&CaY  
     MaskBits&=~CTRLBIT; Hh4$Qr;R  
     break; BUuNI_?M#5  
    case VK_SHIFT: oaM $<  
     MaskBits&=~SHIFTBIT; J9zSBsp_  
     break; % sbDH  
    default: //judge the key and send message xP "7B9B  
     break; >@rsh-Z  
   } c54oQ1Q&"  
   for(int index=0;index<MAX_KEY;index++){ ;1A4p`)  
    if(hCallWnd[index]==NULL) yk,o*g  
     continue; 8dNwi&4  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) 7q^o sOj"  
    { y08.R. l  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); |Xlpgdiu  
     bProcessed=TRUE; tQ&.;{5[f  
    } :]v%6i.  
   } pMe'fC~*  
  } MOKg[ j  
  else if((lParam&0xc000ffff)==1){ //有键按下 0V@u]  
   switch(wParam) c-(,%0G0  
   { O=?WI  
    case VK_MENU: d dkh*[  
     MaskBits|=ALTBIT; D4$;jz,,  
     break; ?<STt 9  
    case VK_CONTROL: 4#1[i|:M  
     MaskBits|=CTRLBIT; MuQyHEDF  
     break; !X[b 4p  
    case VK_SHIFT: 6*J`2U9Q  
     MaskBits|=SHIFTBIT; 3pl/k T.\  
     break; !ZJ" lm  
    default: //judge the key and send message B\G?dmo  
     break; }_vE lBh6$  
   } <,$(,RX  
   for(int index=0;index<MAX_KEY;index++){ vd6Y'Zk|F6  
    if(hCallWnd[index]==NULL) 0GK<l  
     continue; <Wn={1Ts"  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) =* oFs|v  
    { zxTcjC)y  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN);  yl0&|Ub  
     bProcessed=TRUE; s`B]+  
    } !`LaX!bmp  
   } ,]+P#eXgE  
  } cah1'Y  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 ^mz&L|h  
   for(int index=0;index<MAX_KEY;index++){ ]h3<r8D_#  
    if(hCallWnd[index]==NULL) S='AA_jnw  
     continue; ^I*</w8  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) /g BB  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); d!mtSOh  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 ;}"_hLX  
   } [p^N].K$  
  } 61L  vT"  
 } MF)Xc\}0p  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); U` uP^  
} r BQFC 4L  
7=(r k  
  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: sEP-jEuwG  
fl#gWAM  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); osPJ%I`^  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); aw&:$twbM  
:8\!;!  
  为了添加应用程序对热键通知事件的响应,程序中用的办法是重载WindowProc()函数,该函数代码如下: ,K'>s<}  
VJmX@zX9  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) >77N5 >]e  
{ Y_tLSOD#/  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) veIR)i@dx  
 { %xF j;U?  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 azF|L"-RP  
  SaveBmp(); (L}  
  return FALSE; ~47Bbom  
 } >{?~cNO&  
 …… //其它处理及默认处理 _:DnF  
} <Z GEmQ  
mN Hd  
v6(Yz[  
  将屏幕图像保存到BMP文件中的任务是由函数SaveBmp()来完成的,具体实现参见代码部分。另外为了顺利实现屏幕抓图,程序中还实现了"托盘"功能,由于这一部分本书在实例中已经专门介绍过了,所以不再赘述,读者朋友可以参考相关实例。 &'4{/Gz  
W/q-^Zkt,9  
  最后需要提醒读者朋友们注意的是,源程序的编译与使用时要先编译hook.dll并将其放在系统目录(win2000/NT是system32,98/ME是system),然后编译对话框程序运行即可。 <+I^K 7   
Z]kk.@P  
  二、编程步骤 2[6>h)  
ky>0  
  1、 启动Visual C++,生成一个DLL项目和一个基于对话框的应用程序项目,并将两个项目分别命名为"Hook"和"Capture"; cVya~ *  
*y<Ru:D  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; __o`+^FS  
D1]%2:  
  3、 在"Capture"项目中按照图一所示设置对话框的界面,具体设置参见代码部分; H'7AIY }  
|W4 \  
  4、 使用Class Wizard在"Capture"项目中添加按钮的鼠标单击消息响应函数,并重载对话框的WindowProc()函数; q_S`@2Dzz,  
)[_A{#&  
  5、 添加代码,编译运行程序。 2NHuZ.af  
3 r4QB  
三、程序代码 k]?M^jrm  
)NAC9:8!  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL Mwp[?#1j  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) y"q7Gx*^j  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ ,S[,F0"%  
#if _MSC_VER > 1000 j}$dYbf$  
#pragma once WwG +Xa  
#endif // _MSC_VER > 1000 >fHg1d2-  
#ifndef __AFXWIN_H__ &U q++f6  
#error include 'stdafx.h' before including this file for PCH o_; pEe  
#endif o (fZZ`6Y  
#include "resource.h" // main symbols g-lF{Z  
class CHookApp : public CWinApp 5y-8_)y8o  
{ >`L)E,=/  
 public: ."b=dkx  
  CHookApp(); C/V{&/5w  
  // Overrides =Lx*TbsFYt  
  // ClassWizard generated virtual function overrides ]+A>*0#"  
  //{{AFX_VIRTUAL(CHookApp) /xf4*zr  
 public: :a$ZYyD  
  virtual BOOL InitInstance(); / !J1}S  
  virtual int ExitInstance(); v l59|W6  
  //}}AFX_VIRTUAL b*$/(2"m  
  //{{AFX_MSG(CHookApp) ~3-2Iu^F  
  // NOTE - the ClassWizard will add and remove member functions here. 6!P];3&o\A  
  // DO NOT EDIT what you see in these blocks of generated code ! NCbl|v=  
  //}}AFX_MSG )#ze  
  DECLARE_MESSAGE_MAP() )P4#P2  
}; Vfew )]I  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); @gzm4  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); `s74g0h  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); kB_uU !G  
BOOL InitHotkey(); ] =ar&1}J  
BOOL UnInit(); gNk x]bm  
#endif Y^5X>  
obWBX'  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. " a;z  
#include "stdafx.h" St/<\Y,wr  
#include "hook.h" {6MLbL{  
#include <windowsx.h> C {.{>M  
#ifdef _DEBUG _|%pe]St  
#define new DEBUG_NEW X&qRanOP;z  
#undef THIS_FILE XgY( Vv  
static char THIS_FILE[] = __FILE__; sX53(|?*  
#endif iw1((&^)"  
#define MAX_KEY 100 Yc;cf% c1  
#define CTRLBIT 0x04 T{=.mW^ x  
#define ALTBIT 0x02 N}{CL(xi  
#define SHIFTBIT 0x01 /E>z8 J$  
#pragma data_seg("shareddata") ^pz3L'4n  
HHOOK hHook =NULL; T8Sgu6:*R  
UINT nHookCount =0; Q]X0 O10  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey 48,Aq*JFw  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT SPKen}g  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey ^$3 ~;/|  
static int KeyCount =0; ;:xOW$  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift B@!a@0,,_  
#pragma data_seg() )Y':u_Lo  
HINSTANCE hins; ),`MAevp  
void VerifyWindow(); bqY}t. Y&"  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) L'=e /&  
//{{AFX_MSG_MAP(CHookApp) xTQV?g J  
// NOTE - the ClassWizard will add and remove mapping macros here. ~N+lI\K  
// DO NOT EDIT what you see in these blocks of generated code! /Z<"6g?  
//}}AFX_MSG_MAP Dz, Fu:)  
END_MESSAGE_MAP() rhFa rm4a  
U!m-{7s$  
CHookApp::CHookApp() i[FcY2  
{ w7\:S>;(O"  
 // TODO: add construction code here, X;_0"g  
 // Place all significant initialization in InitInstance c)Ft#vzg&e  
} #u+BjuZo  
6w{^S~rqo  
CHookApp theApp; _DfI78`(  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) 5vIuH+0  
{ n0:+D R  
 BOOL bProcessed=FALSE; Zrfp4SlZZ  
 if(HC_ACTION==nCode) $ hB;r  
 { 2 =tPxO')B  
  if((lParam&0xc0000000)==0xc0000000){// Key up Y{y #us1  
   switch(wParam) ^EU& 6M2  
   { =!NYvwg6;o  
    case VK_MENU: I%xrDiK97  
     MaskBits&=~ALTBIT; }i_[wq{E&  
     break; b7fP)nb695  
    case VK_CONTROL: u#=Yv |9  
     MaskBits&=~CTRLBIT; 2L.UEAt  
     break; Q6?+#}  
    case VK_SHIFT: JA7HO |  
     MaskBits&=~SHIFTBIT; 6 .DJR Y  
     break; 2YK4 SL  
    default: //judge the key and send message n`f},.NM|  
     break; s%]-Sw9  
   } :K{`0U&l5  
   for(int index=0;index<MAX_KEY;index++){ tF)K$!GR[  
    if(hCallWnd[index]==NULL) Lc^nNUzPo  
     continue; ( _]{[dFr%  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) IBl}.o&]B#  
    { l/OG 79qq  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); %kD WUJZ  
     bProcessed=TRUE; AF D/ J  
    } 77/y{#Sk  
   } FM9b0qE  
  } W#'c6Hq2c  
  else if((lParam&0xc000ffff)==1){ //Key down xMg&>}5  
   switch(wParam) MnFem $ @  
   { b0LjNO@<  
    case VK_MENU: FsZM_0>/s  
     MaskBits|=ALTBIT; 4s*P5w_'/  
     break; Mr:*l`b_  
    case VK_CONTROL: GN{\ccej  
     MaskBits|=CTRLBIT; )<4o"R:*  
     break; W"Dj+/uS  
    case VK_SHIFT: $V?zJ:a>L  
     MaskBits|=SHIFTBIT; T,(IdVlJ  
     break; Rz`<E97-  
    default: //judge the key and send message 3hR7 . /  
     break; Bt,qG1>$-  
   } YU76(S9 0#  
   for(int index=0;index<MAX_KEY;index++) BieII$\P%P  
   { {d(PH7R  
    if(hCallWnd[index]==NULL) +`f gn9p  
     continue; .}ZX~k&P  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) 6f 6_ztTL  
    { aGp <%d  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); Hk2@X(  
     bProcessed=TRUE; 0]8+rWp|Nz  
    } FVG|5'V^  
   } 3leg,q d  
  } H*|Bukgt/M  
  if(!bProcessed){ &.kg8|s{  
   for(int index=0;index<MAX_KEY;index++){ n i@D7:h  
    if(hCallWnd[index]==NULL) v)N6ZOj*C  
     continue; : ` F>B  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) %H<w.]>  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); _KmpC>J+  
   } eJ{"\c(  
  } K *vNv 4  
 } /Re1QS  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); {z@vSQ=)=P  
} G+[>or}  
U'-MMwE]  
BOOL InitHotkey() ThWZ>hyJ  
{ ?O4Dhu  
 if(hHook!=NULL){ ~\<ZWU<BE  
  nHookCount++; ^ .kas7 <  
  return TRUE; qa^x4xZM  
 } 0x^$q? \A  
 else T<zonx1  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); 7u5B/M!  
  if(hHook!=NULL) o~P8=1t   
   nHookCount++; b{s E#m%r  
  return (hHook!=NULL); 1:YDN.*  
} E\m?0]W|  
BOOL UnInit() i04Sf^  
{ >jl"Yr#  
 if(nHookCount>1){ | nry^zb  
  nHookCount--; n4."}DO  
  return TRUE; l$m^{6IYc  
 } Zy*}C,Z  
 BOOL unhooked = UnhookWindowsHookEx(hHook); 3{MIBMA  
 if(unhooked==TRUE){ e@]cI/j  
  nHookCount=0; .e.vh:Sz  
  hHook=NULL; ~ezCE4^&  
 } V<4)'UI?k9  
 return unhooked; (!X:[Ah*$  
} u6r-{[W}  
xDADJ>u2K  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) m$LZ3=v%8  
{ fil6w</L  
 BOOL bAdded=FALSE; \TMRS(  
 for(int index=0;index<MAX_KEY;index++){ <S$y=>.9  
  if(hCallWnd[index]==0){ Ur&: Rr  
   hCallWnd[index]=hWnd; 8QC:ro  
   HotKey[index]=cKey; w5|@vB/pj  
   HotKeyMask[index]=cMask; P#ru-0DD  
   bAdded=TRUE; -m'a%aog  
   KeyCount++; L6 _Sc-sU  
   break; pNiqb+^nz  
  } 7KM!\"PM  
 } {7/6~\'/@  
 return bAdded; >^InNJd  
} GUN<ZOYb=  
*"zE,Bp"  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask)  iI ^{OD  
{ (/*-M]>  
 BOOL bRemoved=FALSE; +'#d*r91@  
 for(int index=0;index<MAX_KEY;index++){ 3^ Z tIZ  
  if(hCallWnd[index]==hWnd){ tQ&#FFt,)  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ IwH ,g^0\  
    hCallWnd[index]=NULL; Jb tbW &EH  
    HotKey[index]=0; f4tia .  
    HotKeyMask[index]=0; R:ar85F  
    bRemoved=TRUE; 7H >dv'  
    KeyCount--; xD1wHp!+  
    break; HKxrBQr78  
   } UVI=&y]c,p  
  } "R9kF-  
 } H`io|~Q  
 return bRemoved; in+`zfUJ9  
} =~EQ3uX  
YYM  
void VerifyWindow() [e^i".  
{ ;N1FP*  
 for(int i=0;i<MAX_KEY;i++){ k2+Z7#2n  
  if(hCallWnd!=NULL){ y4?>5{`W  
   if(!IsWindow(hCallWnd)){ R,^FJ  
    hCallWnd=NULL; n--`zx-['  
    HotKey=0; RgRcW5VxK  
    HotKeyMask=0; 3 t_5Xacj  
    KeyCount--; X*Q7Yu  
   } HE,wEKp  
  } 6)bfd^JYn  
 } D 3HB`{  
} >=Rb:#UM  
Ys3C'Gc  
BOOL CHookApp::InitInstance() G: &Q)_  
{ DHJnz>bE  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); 4PF4#  
 hins=AfxGetInstanceHandle(); 4@W.{|2~  
 InitHotkey(); K 6G n  
 return CWinApp::InitInstance(); \Fe5<G'v  
} zO\"$8q*  
^al SyJ`  
int CHookApp::ExitInstance() :iWV:0)P  
{ hOC,Eo  
 VerifyWindow(); vcSS+  
 UnInit(); TX+t   
 return CWinApp::ExitInstance(); 2 rBF<z7  
} #F6ak,9S4  
cM"I3  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file Anm5Cvt;i  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) Ux<h` s  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ Fwqv 1+  
#if _MSC_VER > 1000 Rd!.8K[  
#pragma once E nUo B<  
#endif // _MSC_VER > 1000 p_nrua?  
l3MH+o  
class CCaptureDlg : public CDialog wGxLs>| 4  
{ Ip0Zf?  
 // Construction _Ey8P0-I  
 public: WUV Q_<i+  
  BOOL bTray; a&cV@~  
  BOOL bRegistered; w##Fpv<m  
  BOOL RegisterHotkey(); (#,.;Y  
  UCHAR cKey; c ~C W-%wN  
  UCHAR cMask; i'u;"ot=  
  void DeleteIcon(); a3)#tt=rA  
  void AddIcon(); j>:T)zhyY  
  UINT nCount; V,"'k<y  
  void SaveBmp(); GkO6r'MVE  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor 0qZ)$ YKq  
  // Dialog Data 8]L.E  
  //{{AFX_DATA(CCaptureDlg) Lr~K3nb  
  enum { IDD = IDD_CAPTURE_DIALOG }; ?t"PawBWE  
  CComboBox m_Key; 3HiW1*5W  
  BOOL m_bControl; lt]U?VZ   
  BOOL m_bAlt; p?h;Sv/  
  BOOL m_bShift; INT2i8oU  
  CString m_Path; zJy{Ry[Sb  
  CString m_Number; :({<"H)!'  
  //}}AFX_DATA 4CCux4)N  
  // ClassWizard generated virtual function overrides 0k>&MkM\^  
  //{{AFX_VIRTUAL(CCaptureDlg) 6]3 ZUH;  
 public: -,tYfQ;:  
  virtual BOOL PreTranslateMessage(MSG* pMsg); ]aR4U`  
 protected: Ij8tBT?jlL  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support e{O5y8,  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); }:irjeI,  
  //}}AFX_VIRTUAL |)_R bqZ  
  // Implementation Rju8%FRO  
 protected: +OmSR*fA0  
  HICON m_hIcon; ig,|3(  
  // Generated message map functions vOS0E^  
  //{{AFX_MSG(CCaptureDlg) 5zGj,y>u  
  virtual BOOL OnInitDialog(); aVb]H0  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); *l^'v9  
  afx_msg void OnPaint(); 525 >=h  
  afx_msg HCURSOR OnQueryDragIcon(); pSP_cYa#(#  
  virtual void OnCancel(); KWUz]>Z  
  afx_msg void OnAbout(); 0_EF7`T  
  afx_msg void OnBrowse(); f#t^<`7  
  afx_msg void OnChange(); xRUYJ=|oh  
 //}}AFX_MSG >KPJ74R  
 DECLARE_MESSAGE_MAP() ]4yvTP3[Rm  
}; O+$70   
#endif MocH>^,  
5HN<*u%z  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file m [g}vwS  
#include "stdafx.h" dNobvK  
#include "Capture.h" f0s &9H  
#include "CaptureDlg.h" EHHxCq?  
#include <windowsx.h> H^g<`XEgw  
#pragma comment(lib,"hook.lib") s*f.` A*)  
#ifdef _DEBUG 12a #]E  
#define new DEBUG_NEW (`u!/  
#undef THIS_FILE B`aAvD`7  
static char THIS_FILE[] = __FILE__; }}_uN-m  
#endif *PEuaRDN  
#define IDM_SHELL WM_USER+1 pYG,5+g  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); * 2%e.d3"M  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); xNkY'4%  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; (0Cszm.  
class CAboutDlg : public CDialog hl:eF:'hm  
{ 4QNR_w  
 public: ->8q, W2A  
  CAboutDlg(); pxx(BE  
  // Dialog Data r\d:fot  
  //{{AFX_DATA(CAboutDlg) clw91yrQn  
  enum { IDD = IDD_ABOUTBOX }; 'qJ-eQ7e  
  //}}AFX_DATA 02[II_< 1  
  // ClassWizard generated virtual function overrides  G{.+D2  
  //{{AFX_VIRTUAL(CAboutDlg) HH?*"cKF~  
 protected: r<v%Zp  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support O:)IRB3  
  //}}AFX_VIRTUAL ~S6{VK.  
  // Implementation njMy&$6a##  
 protected: ~P_kr'o  
  //{{AFX_MSG(CAboutDlg) ]Qr8wa>Z  
  //}}AFX_MSG ;l()3;  
  DECLARE_MESSAGE_MAP() <h=M Rw,l  
}; ?<'W~Rm6n  
% eRwH >  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) 29^bMau)v  
{ 3L?a4,Q"k}  
 //{{AFX_DATA_INIT(CAboutDlg) 17)M.(qmuP  
 //}}AFX_DATA_INIT 5-HJ&Q  
} ,d>~='  
U_'q-*W  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) AFTed?(  
{ Pfx71*u,  
 CDialog::DoDataExchange(pDX); _kN%6~+U  
 //{{AFX_DATA_MAP(CAboutDlg) )c/y07er  
 //}}AFX_DATA_MAP )`mF.87b&h  
} .~L4#V{c~  
zI!R-Nb  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) (H+[^(3d2  
 //{{AFX_MSG_MAP(CAboutDlg) v:MS0]  
 // No message handlers 2TEeP7  
 //}}AFX_MSG_MAP RCYbRR4y  
END_MESSAGE_MAP() "n }fEVJ,  
Q+(:n)G_6E  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) 2bnIT>(  
: CDialog(CCaptureDlg::IDD, pParent) 9Fx z!-9m  
{ hX%v`8  
 //{{AFX_DATA_INIT(CCaptureDlg)  /kU@S  
  m_bControl = FALSE; gsWlTI  
  m_bAlt = FALSE; #.+*G`m  
  m_bShift = FALSE; XhAcC  
  m_Path = _T("c:\\"); YwWTv  
  m_Number = _T("0 picture captured."); }#*zjMOz  
  nCount=0; Z'dI!8(Nf  
  bRegistered=FALSE; r/sRXM:3cZ  
  bTray=FALSE; j :Jdwf  
 //}}AFX_DATA_INIT E)wT+\  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 o!r4 frP  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); OCO,-(  
} ' 5 qL  
B4 Af  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) \w[ZY$/  
{ h$ iyclX  
 CDialog::DoDataExchange(pDX); jQeE07g  
 //{{AFX_DATA_MAP(CCaptureDlg) B9)qv>m  
  DDX_Control(pDX, IDC_KEY, m_Key); C%?D E@k  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); vKf;&`^qE  
  DDX_Check(pDX, IDC_ALT, m_bAlt); GnrW {o  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); zw0 r i6  
  DDX_Text(pDX, IDC_PATH, m_Path); W#7-%o T  
  DDX_Text(pDX, IDC_NUMBER, m_Number); ; :\,x  
 //}}AFX_DATA_MAP -sH.yAvC6  
} k,iV$,[TF  
 Ox*T:5  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) 40d9/$uzh  
//{{AFX_MSG_MAP(CCaptureDlg) B m@oB2x)  
 ON_WM_SYSCOMMAND() TgE.=`"7  
 ON_WM_PAINT() f9XO9N,hE:  
 ON_WM_QUERYDRAGICON() :G=1$gb  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) rn[}{1I33Q  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) VE"0 VB.  
 ON_BN_CLICKED(ID_CHANGE, OnChange) &R FM d=  
//}}AFX_MSG_MAP oy2dA  
END_MESSAGE_MAP() $4*E\G8  
C+]q  
BOOL CCaptureDlg::OnInitDialog() x*"pDI0k)  
{ Oj lB 0  
 CDialog::OnInitDialog(); K^& ]xFW  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); .'{6u;8  
 ASSERT(IDM_ABOUTBOX < 0xF000); ID).*@(I"  
 CMenu* pSysMenu = GetSystemMenu(FALSE); _ KhEwd  
 if (pSysMenu != NULL) ]#-/i2-K  
 { i 2} =/  
  CString strAboutMenu; iLd"tn'  
  strAboutMenu.LoadString(IDS_ABOUTBOX); f+aS2k(e>  
  if (!strAboutMenu.IsEmpty()) Ta\8 >\6  
  { HD8"=7zJk  
   pSysMenu->AppendMenu(MF_SEPARATOR); grfdvN  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); KYmWfM3^  
  } aU]O$Pg{  
 } p9 ,\{Is  
 SetIcon(m_hIcon, TRUE); // Set big icon bb0McEQy  
 SetIcon(m_hIcon, FALSE); // Set small icon A"<)(M+kG  
 m_Key.SetCurSel(0); Iam-'S5  
 RegisterHotkey(); lp0T\ %  
 CMenu* pMenu=GetSystemMenu(FALSE); ]7R&m)16  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); nK%/tdq  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); n.Eoi4jV'  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); vb.Y8[  
 return TRUE; // return TRUE unless you set the focus to a control Gp3nR<+  
} "tz0ko,(  
yw Q!9 \  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) Q~Sv2  
{ sHPwW5j/o'  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) 0jJ28.kOp  
 { (zw=qbS&  
  CAboutDlg dlgAbout; "G-0iKW;  
  dlgAbout.DoModal(); 60~>f)vu  
 } )4F/T,{;m  
 else ]T3BDgu%&  
 { A]O5+" mc  
  CDialog::OnSysCommand(nID, lParam); Yx}"> ;\  
 } V.QzMF"o  
} L3=YlX`UL  
<&Y}j&(  
void CCaptureDlg::OnPaint() >gZk 581/  
{ bHQKRV  
 if (IsIconic()) cH*/zNp  
 { N4` 9TN7  
  CPaintDC dc(this); // device context for painting &(uF&-PwO4  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); 7ru9dg1?  
  // Center icon in client rectangle ZaUcP6[h  
  int cxIcon = GetSystemMetrics(SM_CXICON); ?m9UhLeaS=  
  int cyIcon = GetSystemMetrics(SM_CYICON); Va/@#=,q]  
  CRect rect; K,C $J I  
  GetClientRect(&rect); M\?uDC9  
  int x = (rect.Width() - cxIcon + 1) / 2; b6WC @j`*T  
  int y = (rect.Height() - cyIcon + 1) / 2; 6|9g4@Hy  
  // Draw the icon ?<yq 2`\4O  
  dc.DrawIcon(x, y, m_hIcon); AR+\uD=\I-  
 } s?G'l=CcKu  
 else sAjKf\][  
 { v1X&p\[d  
  CDialog::OnPaint(); r@ T-Hi  
 }  IB.'4B7  
} ofPF}  
Nvx)H(8F  
HCURSOR CCaptureDlg::OnQueryDragIcon() H6PXx  
{ !AD0 -fZ  
 return (HCURSOR) m_hIcon; ghJ,s|lH  
} H?=pWB  
'[=yfh   
void CCaptureDlg::OnCancel() srChY&h?<  
{ ll<9f)  
 if(bTray) z7t'6Fy9'  
  DeleteIcon(); ;oY(I7  
  CDialog::OnCancel(); s7UhC.>'@  
} JJ N(M*;  
e1 {t0f  
void CCaptureDlg::OnAbout() we H@S  
{ A}#]g>L  
 CAboutDlg dlg; AK~`pq[.  
 dlg.DoModal(); SP D207  
} 9HJ'p:{)  
&8X .!r`f  
void CCaptureDlg::OnBrowse() kuTq8p2E  
{ Oj4u!SY\j  
 CString str; Dc&9emKI  
 BROWSEINFO bi; _r<zSH%  
 char name[MAX_PATH]; _,Rsl$Tk'  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); -e`oW.+  
 bi.hwndOwner=GetSafeHwnd(); IB#iJ# ,  
 bi.pszDisplayName=name; 1|l)gfcP  
 bi.lpszTitle="Select folder"; VT5cxB<  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; <>T&ab@dE(  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); =;k+g?.@I  
 if(idl==NULL) ni"$[8U  
  return; fOK+DT~  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); 9Ew:.&d  
 str.ReleaseBuffer(); Rekb?|{z  
 m_Path=str; /+x#V!zM  
 if(str.GetAt(str.GetLength()-1)!='\\') wzDk{4U  
  m_Path+="\\"; c+Q.?vJ  
 UpdateData(FALSE); t4jd KYA  
} j5,^9'  
y} $ P,  
void CCaptureDlg::SaveBmp() KTLbqSS\  
{ l?o-!M{  
 CDC dc; !Ig|m+  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); ##EB; Y  
 CBitmap bm; v ]/OAH6D  
 int Width=GetSystemMetrics(SM_CXSCREEN); nL":0!DTRD  
 int Height=GetSystemMetrics(SM_CYSCREEN); !y qa?\v9  
 bm.CreateCompatibleBitmap(&dc,Width,Height); R%Ui6dCLo  
 CDC tdc; `FzYvd"N  
 tdc.CreateCompatibleDC(&dc); \ifK~?  
 CBitmap*pOld=tdc.SelectObject(&bm); n2xLgK=  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); Ss#@=:"P  
 tdc.SelectObject(pOld); 68koQgI[^  
 BITMAP btm; ( K6~Tj  
 bm.GetBitmap(&btm); `x{.z=xC  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; Sc4obcw%  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); s FQ4O- SM  
 BITMAPINFOHEADER bih; M1/M}~  
 bih.biBitCount=btm.bmBitsPixel; +{")E)  
 bih.biClrImportant=0; <fC@KY>#  
 bih.biClrUsed=0; S' (cqO}=F  
 bih.biCompression=0; @)W(q5)}9"  
 bih.biHeight=btm.bmHeight; .pS&0gBo\  
 bih.biPlanes=1; M#\  <  
 bih.biSize=sizeof(BITMAPINFOHEADER); C%}]"0Q1  
 bih.biSizeImage=size; &dhcKO<4  
 bih.biWidth=btm.bmWidth; %Y cxC0S[  
 bih.biXPelsPerMeter=0; kf%&d}2to  
 bih.biYPelsPerMeter=0; 9 3W  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); .N~PHyXZR  
 static int filecount=0; .>mH]/]m  
 CString name; ]>R`;"(  
 name.Format("pict%04d.bmp",filecount++); JmU<y  
 name=m_Path+name; V;h=8C5J  
 BITMAPFILEHEADER bfh; e/"yGQu  
 bfh.bfReserved1=bfh.bfReserved2=0; X q}Ucpj  
 bfh.bfType=((WORD)('M'<< 8)|'B'); HE#,(;1i  
 bfh.bfSize=54+size; 7BL |x  
 bfh.bfOffBits=54; ||-nmOy  
 CFile bf; Vs#"SpH{'  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ z-EwXE  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); B ~fSMB6h  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); GXDC@+$14  
  bf.WriteHuge(lpData,size); sU) TXL'_!  
  bf.Close(); ,O:EX0  
  nCount++; :a_BD  
 } ?z2jk  
 GlobalFreePtr(lpData); ?QCmSK=L  
 if(nCount==1) w)+wj[6 E  
  m_Number.Format("%d picture captured.",nCount); V]I:2k5  
 else ?PBa'g  
  m_Number.Format("%d pictures captured.",nCount); QGs1zfh*  
  UpdateData(FALSE); T>}0) s  
} z$JX'(<Z7  
+hE',i.  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) bA}AD`5  
{ 3lo;^KX !  
 if(pMsg -> message == WM_KEYDOWN) 2 \^G['9  
 { @ Ii-NmOr  
  if(pMsg -> wParam == VK_ESCAPE) HXQ e\r  
   return TRUE; `I5O4|K)  
  if(pMsg -> wParam == VK_RETURN) Tbv/wJ  
   return TRUE; s|Z:}W?{  
 } `W@T'T"  
 return CDialog::PreTranslateMessage(pMsg); )PR3s1S^  
} 9n1ZVP.ag  
0cHfxy3  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) O^5UB~  
{ KAd_zkUA  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ 6iG(C.b  
  SaveBmp(); Zy^=fM  
  return FALSE; DH 6q7"@  
}  n;wwMMBM  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ yL0f1nS  
 CMenu pop; f|OI`  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); RFw(]o,9cR  
 CMenu*pMenu=pop.GetSubMenu(0); Z&_y0W=t  
 pMenu->SetDefaultItem(ID_EXITICON); PK_s#uC  
 CPoint pt; otO j^xU  
 GetCursorPos(&pt); t/}L36@+  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); 'It?wB W  
 if(id==ID_EXITICON) B[r<m J  
  DeleteIcon(); vxZg &SRK  
 else if(id==ID_EXIT) > 2#%$lX6  
  OnCancel(); n-DaX kK  
 return FALSE; R{HV]o|qk  
} R (G2qi  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); +a%xyD:.?  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) 3gAR4  
 AddIcon(); 5iVQc-m&  
 return res; $9 K(F~/  
} pz{'1\_+9  
ipobr7G.SD  
void CCaptureDlg::AddIcon() i3#'*7f%j  
{ 8".2)W4*  
 NOTIFYICONDATA data; LheFQ A  
 data.cbSize=sizeof(NOTIFYICONDATA); C,/O   
 CString tip; ?WQNIX4  
 tip.LoadString(IDS_ICONTIP); $B\ H  
 data.hIcon=GetIcon(0); I,b9t\(6  
 data.hWnd=GetSafeHwnd(); ?v:ZU~i  
 strcpy(data.szTip,tip); IV'p~t  
 data.uCallbackMessage=IDM_SHELL; H$!+A  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; Z7fg 25  
 data.uID=98; qj&b o  
 Shell_NotifyIcon(NIM_ADD,&data); .2 0V 3  
 ShowWindow(SW_HIDE); fAGctRGH  
 bTray=TRUE; `H\)e%]  
} Y;Ap9i*  
8nCp\0  
void CCaptureDlg::DeleteIcon() OO nX`  
{ g+xw$A ou  
 NOTIFYICONDATA data; Ve}[XqdS^p  
 data.cbSize=sizeof(NOTIFYICONDATA); 8'A72*dhX  
 data.hWnd=GetSafeHwnd(); >H>gH2qp  
 data.uID=98; q/NY72tj0  
 Shell_NotifyIcon(NIM_DELETE,&data); #E DEYEW7  
 ShowWindow(SW_SHOW); 9Hd;35 3Q  
 SetForegroundWindow(); =.*98  
 ShowWindow(SW_SHOWNORMAL); `1Zhq+s  
 bTray=FALSE; OR:[J5M)  
} y` yZ R _  
kbYeV_OwM  
void CCaptureDlg::OnChange() Bq@zaMv  
{ iib  
 RegisterHotkey(); LvcuZZ`1a  
} P ZxFZvE  
qi(*ty  
BOOL CCaptureDlg::RegisterHotkey() Ha%F"V*  
{ 2?W7I/F  
 UpdateData(); 5rb-U7 /  
 UCHAR mask=0; ZtK\HDdp  
 UCHAR key=0; ](#&.q%5!  
 if(m_bControl) :]PM_V|  
  mask|=4; &fwS{n;U  
 if(m_bAlt) glE^t6)  
  mask|=2; -Fxmsi  
 if(m_bShift) x&Cp> +i  
  mask|=1; ; Y"N6%  
  key=Key_Table[m_Key.GetCurSel()]; N>|XS ,  
 if(bRegistered){ (u hd "  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); Ql%qQ ZV  
  bRegistered=FALSE; n_Onr0EvO  
 } bl;zR  
 cMask=mask;  Ow:1?Z{4  
 cKey=key; `]=oo%(h  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); @*>Sw>oet  
 return bRegistered; C$d>_ r  
} t{dSX?<nt  
AQss4[\Dx  
  四、小结 } fZ`IOf  
u,1}h L  
  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