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
  • 7657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: g=I8@m  
  /cU<hApK  
  一、实现方法 0RoU}r@z4  
^Q+g({  
  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: /0Ax*919j  
c("_bOAT  
#pragma data_seg("shareddata") E Cyyl  
HHOOK hHook =NULL; //钩子句柄 U8 nH;}i  
UINT nHookCount =0; //挂接的程序数目 +TXX$)3%  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 "etPT@gF  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 j~*L~7  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey W.kM7z>G  
static int KeyCount =0; / X1 x  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 _a1x\,R|DB  
#pragma data_seg() l ok=  
\L"kV!>  
  关于共享段,有几点重要的说明:一是必须在链接选项里指定该段为共享:一种方法是在project->settings->link->object/library中加上/section:shareddata,rws;第二种方法是在def文件的sections里加上一句shareddata read write shared;第三种指定共享段的方法在程序里加上一句#pragma comment(linker,"section:shareddata,rws")。二是所有的变量必须初始化,否则链接程序会把它放到普通数据段。三是如果不初始化变量,需要在段外用"__declspec(allocate("shareddata")) 变量类型 变量名"的方式定义。 )ZN|t?|  
qvPtyc^fN  
  DLL中的两个输出函数分别用来添加/删除热键,函数代码如下: !"Oh3 6  
&RfC"lc  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR ynbuN x*  
cKey,UCHAR cMask) AM!G1^c  
{ ~?(N  
 BOOL bAdded=FALSE; rS;Dmm  
 for(int index=0;index<MAX_KEY;index++){ Fi0GknQ+  
  if(hCallWnd[index]==0){ EAM5{Nc  
   hCallWnd[index]=hWnd; I'LnI*  
   HotKey[index]=cKey; 1')%`~  
   HotKeyMask[index]=cMask; t<#h$}=:Vt  
   bAdded=TRUE; b9!FC$^J  
   KeyCount++; WYr/oRO  
   break; BqT y~{)+  
  } r(P(Rj2~  
 } lv04g} W  
 return bAdded; @Z12CrJ  
}  P Y  
//删除热键 t2)rUWg  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) ^jx7@LgS=  
{ P?k0zwOlBl  
 BOOL bRemoved=FALSE; O&Y*pOg  
 for(int index=0;index<MAX_KEY;index++){ pej|!oX  
  if(hCallWnd[index]==hWnd){ ')$+G152  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ 4q k9NK2 U  
    hCallWnd[index]=NULL; 9g mW&{6q  
    HotKey[index]=0; % yw?s0  
    HotKeyMask[index]=0;  a24"yT  
    bRemoved=TRUE; o7$'cn  
    KeyCount--; !4X f~P  
    break; I"ok&^t^}  
   } }|pwz   
  } R#I0|;q4|p  
 } 1]p ZrBh"E  
 return bRemoved; :>C2gS@  
} 0.@&_XTPl  
"/wyZ  
H5Io{B%=  
  DLL中的钩子函数如下: y2^Y/)   
jWrj?DV,2N  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) qHrc9fB  
{ +8RgF   
 BOOL bProcessed=FALSE; p"KFJ  
 if(HC_ACTION==nCode) T: =lz:}I  
 { >7QvK3S4%  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 =Lf,?"S  
   switch(wParam) XzEc2)0'v  
   {  eLfk\kk]Pc  
    case VK_MENU: XMxSQ B1  
     MaskBits&=~ALTBIT; H<PtAYFS  
     break; tg<EY!WY  
    case VK_CONTROL:  @fl-3q  
     MaskBits&=~CTRLBIT; ~ Q.7VDz  
     break; xwq+j "  
    case VK_SHIFT: Q|#W#LV,K  
     MaskBits&=~SHIFTBIT; q!|*oUW  
     break; 1ng!G 7g  
    default: //judge the key and send message ?j"KV_  
     break; ?B2] -+Y  
   } E2Q[ZoVS  
   for(int index=0;index<MAX_KEY;index++){ !1$])VQWI  
    if(hCallWnd[index]==NULL) 4b98Ks Yg  
     continue; )p<ExMIxd  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) ~?K~L~f5  
    { 0.8  2kl  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); }&w Ur>=  
     bProcessed=TRUE; &E.^jR~*  
    } ewctkI$,5  
   } tFp Ygff<  
  } s~5[![1 K  
  else if((lParam&0xc000ffff)==1){ //有键按下 x-^`~ p  
   switch(wParam) XovRg,  
   { YS/Yd[ e  
    case VK_MENU: hoK>~:;  
     MaskBits|=ALTBIT; v>Q #B  
     break; \1D<!k\S  
    case VK_CONTROL: RO 4Z?tz  
     MaskBits|=CTRLBIT; x|pg"v&[  
     break; _({hc+9p  
    case VK_SHIFT: {xXsBh Y  
     MaskBits|=SHIFTBIT; >n'o*gZM  
     break; 1H6<[iHW  
    default: //judge the key and send message '"SEw w  
     break; l`#4KCL(  
   } pKpUXfQu  
   for(int index=0;index<MAX_KEY;index++){ r]:(Vk]|F  
    if(hCallWnd[index]==NULL) {zQ8)$CQ  
     continue; H4:`6 PSL  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) |}=acc/  
    { _Xk.p_uh  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); -zOdU}91Ao  
     bProcessed=TRUE; UC]\yUK1J  
    } $4h5rC g0  
   } oX30VfT  
  } \LR~r%(rM  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 Oo5w?+t  
   for(int index=0;index<MAX_KEY;index++){ `6~Aoe  
    if(hCallWnd[index]==NULL) J^SdH&%Z  
     continue; J;.wXS_U8  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) 4|riKo)  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); 49GkPy#]L=  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 .F   
   } JTSlWq4  
  } RP[{4 Q8  
 } WrQDX3  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); B +\3-q  
}  D~S<U  
?!A7rb/tj  
  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: YIoQL}pX  
8']M^|1  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); e7Xeo+/  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); q&s3wDl/  
,(d) Qg  
  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: oHd FMD@  
\2N!:%k  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) 2@'oe7E  
{ v$7QIl_/7  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) ,?8qpEG~#+  
 { ORe(]I`Z  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 7K,-01-:  
  SaveBmp(); )h"<\%LU  
  return FALSE; 8!O5quEc  
 } Ta ?_5  
 …… //其它处理及默认处理 }vxw*8d?  
} UO0{):w>  
vQosPS_2L  
\?[v{WP)  
  将屏幕图像保存到BMP文件中的任务是由函数SaveBmp()来完成的,具体实现参见代码部分。另外为了顺利实现屏幕抓图,程序中还实现了"托盘"功能,由于这一部分本书在实例中已经专门介绍过了,所以不再赘述,读者朋友可以参考相关实例。 5na~@-9p  
;RDh ~EV  
  最后需要提醒读者朋友们注意的是,源程序的编译与使用时要先编译hook.dll并将其放在系统目录(win2000/NT是system32,98/ME是system),然后编译对话框程序运行即可。 @XLy7_}  
n0r+A^]  
  二、编程步骤 [Dk=? +  
q)X$^oE!6  
  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"; <"{qk2LS1  
adCU61t  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; -lbm* -(  
XG{{ 2f  
  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; Tl(^  
s.bc>E0  
  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; 27 ]':A4_  
t3*wjQ3  
  5、 添加代码,编译运行程序。 .k,1f*%  
^U `[(kz=  
三、程序代码 Ixb=L (V  
2|3)S`WZl  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL :o0JY= 5  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) ^o^H3m  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ 6t>.[Y"v  
#if _MSC_VER > 1000 HW3 }uP\c  
#pragma once B~]k#Ot)  
#endif // _MSC_VER > 1000 Aydm2!l1  
#ifndef __AFXWIN_H__ )Xk0VDNp$/  
#error include 'stdafx.h' before including this file for PCH 7C,&*Ax,9  
#endif 6IBgt!=,  
#include "resource.h" // main symbols #p P[xE"Y  
class CHookApp : public CWinApp $7O}S.x  
{ sD{Wxv  
 public: HJLu'KY }  
  CHookApp(); {P*pk c  
  // Overrides  CJ1 7n  
  // ClassWizard generated virtual function overrides E@@5BEB ~  
  //{{AFX_VIRTUAL(CHookApp) 'Y*E<6:  
 public: ',Y.v"']4  
  virtual BOOL InitInstance(); '8Q]C*Z  
  virtual int ExitInstance(); xbdN0MAU  
  //}}AFX_VIRTUAL ^T*?>%`  
  //{{AFX_MSG(CHookApp) !nqUBa  
  // NOTE - the ClassWizard will add and remove member functions here. ykl .1(  
  // DO NOT EDIT what you see in these blocks of generated code ! u[@l~gwL  
  //}}AFX_MSG l1T m`7}  
  DECLARE_MESSAGE_MAP() g[1gF&  
}; >6NRi/[  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); rf $QxJ  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); o)Iff)m$  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); Li!Vx1p;u.  
BOOL InitHotkey(); )m`<H>[Eb=  
BOOL UnInit(); "S8uoSF`>  
#endif vMA]j>>  
uD\?(LM  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. <v)1<*I  
#include "stdafx.h" -m)X]]~C  
#include "hook.h" }Ga\wV  
#include <windowsx.h> PH1p2Je  
#ifdef _DEBUG g<l1zo`_  
#define new DEBUG_NEW JSkLEa~<  
#undef THIS_FILE 9{RB{<Se!  
static char THIS_FILE[] = __FILE__; }p}[j t  
#endif I9/W;# *~  
#define MAX_KEY 100 J2::'Hw*s  
#define CTRLBIT 0x04 v4u5yy_;(  
#define ALTBIT 0x02 NG--6\  
#define SHIFTBIT 0x01 n,jKmA  
#pragma data_seg("shareddata") hlV=qfc  
HHOOK hHook =NULL; Z'4./  
UINT nHookCount =0; N*"p|yhd]  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey s %qF/70'  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT j}%ja_9S  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey 0xxg|;h.,g  
static int KeyCount =0; d6'{rje(  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift @OV|]u  
#pragma data_seg() *AG#316  
HINSTANCE hins; :yRo3c  
void VerifyWindow(); D ~stM  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) `7[EKOJ3g  
//{{AFX_MSG_MAP(CHookApp) V}J)\VZ2#  
// NOTE - the ClassWizard will add and remove mapping macros here. <vUbv   
// DO NOT EDIT what you see in these blocks of generated code! KV}FZ3jY  
//}}AFX_MSG_MAP U7K,AflK?M  
END_MESSAGE_MAP() ]"t@-PFX<  
x}_]A$nV  
CHookApp::CHookApp() qAAX;N  
{ Ir {OheJ  
 // TODO: add construction code here, ruc++@ J@  
 // Place all significant initialization in InitInstance 1$D_6U:H0  
} 9`1O"R/  
ey2S#%DF]  
CHookApp theApp; $CY~5A`l9  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) 6N",- c  
{ I/a/)No  
 BOOL bProcessed=FALSE; 8D>n1b(H  
 if(HC_ACTION==nCode) :# .<[  
 { u])b,9&En  
  if((lParam&0xc0000000)==0xc0000000){// Key up |bq$xp  
   switch(wParam) /.3}aj;6  
   { RZHd9v$  
    case VK_MENU: IEXt:  
     MaskBits&=~ALTBIT; }@;ep&b*  
     break; UELy"z R  
    case VK_CONTROL: q#T/  
     MaskBits&=~CTRLBIT; Hc>m;[M)l  
     break; gG]Eeu+z   
    case VK_SHIFT: : ]sUpO  
     MaskBits&=~SHIFTBIT; _oHNkKQ  
     break; [#l*_0  
    default: //judge the key and send message :K-~fA%kt?  
     break; fuWO*  
   } A;*d}Xe&J  
   for(int index=0;index<MAX_KEY;index++){ S#MZV@nGF  
    if(hCallWnd[index]==NULL) E;Y;z  
     continue; GO__$%~  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) 55tKTpV  
    { v*;-yG&  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); CS@FYO  
     bProcessed=TRUE; {_`^R>"\&w  
    } 8dO!  
   } &7`^i.fh)  
  } YpH&<$x:  
  else if((lParam&0xc000ffff)==1){ //Key down SSPHhAeH8  
   switch(wParam) A Y*e@nk\  
   { eCqHvMp  
    case VK_MENU: K%a%a6k`  
     MaskBits|=ALTBIT; t/cY=Wp  
     break; $"FQj4%d  
    case VK_CONTROL: m;'6MHx;  
     MaskBits|=CTRLBIT; PK{acen  
     break; X;i~ <Tq  
    case VK_SHIFT: L;*ljZ^c  
     MaskBits|=SHIFTBIT; |.F$G<  
     break; {zn!vJX  
    default: //judge the key and send message TM_/ `a2}  
     break; JBXrFC;  
   } LS7, a|  
   for(int index=0;index<MAX_KEY;index++) W8ouO+wK  
   { `-(|>5wWS  
    if(hCallWnd[index]==NULL) :pGaFWkvO  
     continue; 4Uphfzv3D  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) o=50>$5jlS  
    { EK;YiJ  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); #:[t^}  
     bProcessed=TRUE; >33=<~#n  
    } hEBY8=gK  
   } mS^tX i5hg  
  } pi Z[Y 5OE  
  if(!bProcessed){ MCS8y+QK  
   for(int index=0;index<MAX_KEY;index++){ w2 a1mU/  
    if(hCallWnd[index]==NULL) >4#)r8;dx  
     continue; Y0x%sz 5  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) y9x w 9l'  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); `8AR_7i  
   } F<qz[,]|-j  
  } iPd[l {85Z  
 } *h'=3w:G  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); g;2?F[8Th  
} *M:B\ D  
n/SwP  
BOOL InitHotkey() 3QG7C{  
{ K_RjX>q%N  
 if(hHook!=NULL){ +89*)pk   
  nHookCount++; sE:M@`2L  
  return TRUE; ujlY! -GM  
 } _H j!2 '  
 else QR%mj*@Wle  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); 2w["aVr =  
  if(hHook!=NULL) \.-}adKg  
   nHookCount++; .NYbi@bk(<  
  return (hHook!=NULL); -I&m:A$4*  
} a0D%k:k5  
BOOL UnInit() D|e uX7b  
{ l|kSsP:GO  
 if(nHookCount>1){ H."EUcE{  
  nHookCount--; ~:Ll&29i  
  return TRUE; SKkUU^\#R`  
 } j`~Ms>  
 BOOL unhooked = UnhookWindowsHookEx(hHook); wE?'Cl  
 if(unhooked==TRUE){ KwPOO{4]g  
  nHookCount=0; 7R6ry(6N  
  hHook=NULL; E`?3PA8  
 } [co% :xJu  
 return unhooked; n/+.s(7c  
} Cj{1H([-  
}+C2I  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) 4lKq{X5<  
{ KY51rw.  
 BOOL bAdded=FALSE; G/7cK\^u  
 for(int index=0;index<MAX_KEY;index++){ IOqwCD[  
  if(hCallWnd[index]==0){ xx#zN0I>-y  
   hCallWnd[index]=hWnd; v":x4!kdX  
   HotKey[index]=cKey; b:tob0TB  
   HotKeyMask[index]=cMask; 0=AVW`J  
   bAdded=TRUE; BT}!W`  
   KeyCount++; !,6c ~ w  
   break; {(r`k;fB  
  } 6)Y.7XR  
 } -OapVac  
 return bAdded; ;#vKi0V7  
} y CVI\y\B  
@~YYD#'vNY  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) D/vOs[X o,  
{ NT e5  
 BOOL bRemoved=FALSE; 8B\2Zfe  
 for(int index=0;index<MAX_KEY;index++){ ^(f"v e#7v  
  if(hCallWnd[index]==hWnd){ .k%[4:Fe  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ ?~hHGf\^b6  
    hCallWnd[index]=NULL; ;[=8B \?  
    HotKey[index]=0; Bq D'8zLD  
    HotKeyMask[index]=0; ^j31S*f&:  
    bRemoved=TRUE; +^=8ge}  
    KeyCount--; L"o>wYx  
    break; kXi6lh  
   } Z -W(l<  
  } >[*8I\*@n  
 } {L/tst#C  
 return bRemoved; 05b_)&4R  
} A v2 08}Y  
jRJn+  
void VerifyWindow() gcdlT7F)b-  
{ CGY]r.O*  
 for(int i=0;i<MAX_KEY;i++){ -f%'  
  if(hCallWnd!=NULL){ B0dQ@Hq*  
   if(!IsWindow(hCallWnd)){ a&c6.#E{y  
    hCallWnd=NULL; <{V(.=11  
    HotKey=0; 60J;sGW  
    HotKeyMask=0; H!5\v"]WB  
    KeyCount--; nxWY7hU  
   } ]:Ns f|C0  
  } Yu)NO\3&  
 } f !I[>&n  
} psg)*'r  
>8WP0 Qx/  
BOOL CHookApp::InitInstance() '8!Y D?n  
{ lDYyqG4  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); VyzS^AH K  
 hins=AfxGetInstanceHandle(); ow_W%I=6  
 InitHotkey(); {2=jAz'?  
 return CWinApp::InitInstance(); A OISs4  
} mH%yGBp_  
!F A]  
int CHookApp::ExitInstance() x:),P-~w  
{ m1B+31'>^  
 VerifyWindow(); b:l P%|7  
 UnInit(); jL%x7?*U0  
 return CWinApp::ExitInstance(); 8Kg n"M3  
} *h!28Ya(~  
r+":'/[x  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file rH_\ d?b  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) nqI@Y)  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ eg(6^:z?f  
#if _MSC_VER > 1000 eJxw) zd7  
#pragma once qf!p 9@4F[  
#endif // _MSC_VER > 1000 YH vLGc%  
oU056  
class CCaptureDlg : public CDialog g!lWu[d  
{ $Tu61zq  
 // Construction i V'k}rXC  
 public: N/ %WsQp  
  BOOL bTray; pGJ>O/%  
  BOOL bRegistered; uE%r/:!k4$  
  BOOL RegisterHotkey(); ([SU:F!uW(  
  UCHAR cKey; }001K  
  UCHAR cMask; sf)EMh3Z  
  void DeleteIcon(); L ^q""[  
  void AddIcon(); =G7m)!  
  UINT nCount; cq}EZ@ .  
  void SaveBmp(); `Aw^H!  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor . $BUw  
  // Dialog Data =Je[c,&j$?  
  //{{AFX_DATA(CCaptureDlg) tnH2sHby  
  enum { IDD = IDD_CAPTURE_DIALOG }; $*e2YQdLo  
  CComboBox m_Key; B* ?]H*K  
  BOOL m_bControl; /|tJ6T1LrB  
  BOOL m_bAlt; AK'[c+2[  
  BOOL m_bShift; Fq |Ni$  
  CString m_Path; z\K"Rg~J  
  CString m_Number; yE:+Lo`>  
  //}}AFX_DATA R=gb'  
  // ClassWizard generated virtual function overrides lR )67a  
  //{{AFX_VIRTUAL(CCaptureDlg)  .E`\MtA  
 public: |bTPtrT8  
  virtual BOOL PreTranslateMessage(MSG* pMsg); G`cHCP_n  
 protected: ZrPbl "`7  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support vHyC;4'  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); zHA!%>%'  
  //}}AFX_VIRTUAL R3x3]]D  
  // Implementation qTdheX/  
 protected: W>) M5t4i  
  HICON m_hIcon; K^1oDP  
  // Generated message map functions 5gYRwuf  
  //{{AFX_MSG(CCaptureDlg) &e E=<x  
  virtual BOOL OnInitDialog(); rp3V3]EE  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); 0 ?s|i :  
  afx_msg void OnPaint(); %j.0G`x9 +  
  afx_msg HCURSOR OnQueryDragIcon(); t{xf:~B  
  virtual void OnCancel(); 't:; irLW.  
  afx_msg void OnAbout(); OI|[roMK  
  afx_msg void OnBrowse(); b$N 2z  
  afx_msg void OnChange(); 9IjIIM2y  
 //}}AFX_MSG yA)/Q Yge  
 DECLARE_MESSAGE_MAP() \pPY37l  
}; 01wX`"I  
#endif cG[l!Z  
0)Uce=t`  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file (SpX w,:  
#include "stdafx.h" 4 {y)TZ  
#include "Capture.h" \UPjf]&  
#include "CaptureDlg.h" _Gn2o2T  
#include <windowsx.h> Y~c|hfL  
#pragma comment(lib,"hook.lib") J\+0[~~  
#ifdef _DEBUG B^4&-z2|  
#define new DEBUG_NEW [w0QZyUn  
#undef THIS_FILE |XQIfW]A  
static char THIS_FILE[] = __FILE__; 'GNK"XA^  
#endif +ieY:H[  
#define IDM_SHELL WM_USER+1 uGwm r  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); 6a[}'/  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); +O8%Hm  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; ff]6aR/ UQ  
class CAboutDlg : public CDialog Vr]id  
{ 5eLtCsHz  
 public: q ?|,O;?  
  CAboutDlg(); |cK*~  
  // Dialog Data vx>b^tJKC  
  //{{AFX_DATA(CAboutDlg) fz|cnU  
  enum { IDD = IDD_ABOUTBOX }; >")Tf6zw&  
  //}}AFX_DATA `F-/QX[:  
  // ClassWizard generated virtual function overrides Oxm>c[R  
  //{{AFX_VIRTUAL(CAboutDlg) LhA*F[6$M  
 protected: (up~[  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support v[ . cd*b  
  //}}AFX_VIRTUAL ]OM"ZG/^  
  // Implementation c/D+|X*  
 protected: {j9{n  
  //{{AFX_MSG(CAboutDlg) } df W%{  
  //}}AFX_MSG 5 h-@|t  
  DECLARE_MESSAGE_MAP() s3z$e+A8  
}; ?M8dP%&r  
|?!~{-o  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) "Lzi+1  
{ ^H~h\,;zQ  
 //{{AFX_DATA_INIT(CAboutDlg) fY{1F   
 //}}AFX_DATA_INIT 9Vg?{v!yn  
} ;y,5k?  
bWH&P/>  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) `ZU($!(  
{ /Gd=n  
 CDialog::DoDataExchange(pDX); d(\%Os   
 //{{AFX_DATA_MAP(CAboutDlg) Pr3qo4t.L  
 //}}AFX_DATA_MAP {+ ][5<q  
} <`.X$r*  
o)h_H;  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) P@Hs`=  
 //{{AFX_MSG_MAP(CAboutDlg) CNih6R  
 // No message handlers U_Vs.M.p  
 //}}AFX_MSG_MAP `tB gH_$M  
END_MESSAGE_MAP() y^;#&k!  
@Pm>sY}d<I  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) O8+7g+J=!  
: CDialog(CCaptureDlg::IDD, pParent) r /YMLQ  
{ 1ct;A_48  
 //{{AFX_DATA_INIT(CCaptureDlg) /$i.0$L  
  m_bControl = FALSE; <NR#Y%}-V  
  m_bAlt = FALSE; bfFeBBi  
  m_bShift = FALSE; zZ7;jyD  
  m_Path = _T("c:\\"); b+%f+zz*h  
  m_Number = _T("0 picture captured."); v| gw9  
  nCount=0; r A`V}>Xj  
  bRegistered=FALSE; CnU*Jb  
  bTray=FALSE; uW=k K0E  
 //}}AFX_DATA_INIT ^|/TC!v]M  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32  ]3x?  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); \9cbI3rGz  
} HguT"%iv  
_> 5(iDW0  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) Vp#JS3Y  
{ t#V!8EpBg  
 CDialog::DoDataExchange(pDX); (]Z_UTT  
 //{{AFX_DATA_MAP(CCaptureDlg) /sUYU (3  
  DDX_Control(pDX, IDC_KEY, m_Key); Ghu#XJB?  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); h`]Iy  
  DDX_Check(pDX, IDC_ALT, m_bAlt); \RNNg  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); s(5Y  
  DDX_Text(pDX, IDC_PATH, m_Path); ]GMe \n  
  DDX_Text(pDX, IDC_NUMBER, m_Number); jfP*"uUK  
 //}}AFX_DATA_MAP rxe >}ZO  
} ,-$LmECg  
9eGyyZg  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) 4qO+_!x{)  
//{{AFX_MSG_MAP(CCaptureDlg) 6w*dKInG[-  
 ON_WM_SYSCOMMAND() x/NfZ5e0X  
 ON_WM_PAINT() QCD .YFM  
 ON_WM_QUERYDRAGICON() EOIN^4V"  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) cbNTj$'b2u  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) F5LuSy+v  
 ON_BN_CLICKED(ID_CHANGE, OnChange) l>2E (Y|  
//}}AFX_MSG_MAP {'N Z.  
END_MESSAGE_MAP() ls_'')yp  
cL-[ZvyVX  
BOOL CCaptureDlg::OnInitDialog() }QN1|mP2  
{ Lco~,OE  
 CDialog::OnInitDialog(); ~d o9;8v  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); Sj-n;F|=X  
 ASSERT(IDM_ABOUTBOX < 0xF000); spGb!Y`mR  
 CMenu* pSysMenu = GetSystemMenu(FALSE); c-x,fS"&W  
 if (pSysMenu != NULL) 61,;Uc\T  
 { ?274uAO'  
  CString strAboutMenu; ]jtK I4  
  strAboutMenu.LoadString(IDS_ABOUTBOX); J}*,HT*  
  if (!strAboutMenu.IsEmpty()) &VhroHO  
  { z#8~iF1  
   pSysMenu->AppendMenu(MF_SEPARATOR); .sxcCrQE  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); bh s5x  
  } %r<rcY  
 } NC8t) X7  
 SetIcon(m_hIcon, TRUE); // Set big icon XQrF4l  
 SetIcon(m_hIcon, FALSE); // Set small icon 4{}FL  
 m_Key.SetCurSel(0); 9?A)n4b;  
 RegisterHotkey(); k o5@qNq  
 CMenu* pMenu=GetSystemMenu(FALSE); 5<iV2Hx  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); ) mI05  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); }Q)#[#e  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); ~t@cO.c  
 return TRUE; // return TRUE unless you set the focus to a control \6S7T$$ 1m  
} &X`C%h  
a_[Eh fE  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) \(J8#V  
{ QEm|])V  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) d)"3K6s|5  
 { 6~0$Z-);(  
  CAboutDlg dlgAbout; Z_PNI#h*  
  dlgAbout.DoModal(); bADnW4N`6;  
 } 8J*"%C$qe  
 else TIx|L  
 { Eou~P h*t  
  CDialog::OnSysCommand(nID, lParam); CWf / H)~  
 } \(~y?l  
} v:EB*3n5  
]O Z5 fd  
void CCaptureDlg::OnPaint() *w$W2I>b7  
{ w:??h4lt  
 if (IsIconic()) IW)()*8;/  
 { LnFdhrB@x  
  CPaintDC dc(this); // device context for painting 7WZrSC  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); B5gj_^  
  // Center icon in client rectangle jL y  
  int cxIcon = GetSystemMetrics(SM_CXICON); pny11C  
  int cyIcon = GetSystemMetrics(SM_CYICON); zUDg&-J3  
  CRect rect; "MxnFeLM#  
  GetClientRect(&rect); yTyj'-4  
  int x = (rect.Width() - cxIcon + 1) / 2; cO-7ke  
  int y = (rect.Height() - cyIcon + 1) / 2;  |$+3a  
  // Draw the icon xpNH?#&  
  dc.DrawIcon(x, y, m_hIcon); u=Fv 2  
 } :fKl]XO  
 else <i<J^-W  
 { :KH g&ZX7  
  CDialog::OnPaint(); Q.bXM?V)  
 } B*qi_{Gp  
} Pih tf4i  
!y#"l$"xK  
HCURSOR CCaptureDlg::OnQueryDragIcon() < 3(LWxw  
{ uvgdY  
 return (HCURSOR) m_hIcon; h}-3\8 >  
} 1ofKt=|=  
|o,YCzy|5  
void CCaptureDlg::OnCancel() @<<<C?CTv  
{ K*\' .~[6  
 if(bTray) 909?_ v  
  DeleteIcon(); 6.FY0.i  
  CDialog::OnCancel(); MU>k,:[  
} ::o lN  
_t:$XJ`bTk  
void CCaptureDlg::OnAbout() p$SX  
{ r)qnl9?;`]  
 CAboutDlg dlg; "vA}FV%tRq  
 dlg.DoModal(); =6xrfDbN8  
} O[# 27_dH  
d[r#-h> dS  
void CCaptureDlg::OnBrowse() kTKq/G,Ft  
{ 01[NX? qEa  
 CString str; yh^!'!I6u[  
 BROWSEINFO bi; z+x\(/  
 char name[MAX_PATH]; 2Fy>.*,?  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); Wi>!{.}%A  
 bi.hwndOwner=GetSafeHwnd(); M]<?k]_p  
 bi.pszDisplayName=name; g! cUF+  
 bi.lpszTitle="Select folder"; c_\YBe]wJ  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; ;V@WtZv  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); %lL.[8r|  
 if(idl==NULL) ]d55m/(   
  return; Ok{*fa.PK  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); $J4 *U  
 str.ReleaseBuffer(); IOTR/anu  
 m_Path=str; I6~pV@h^=  
 if(str.GetAt(str.GetLength()-1)!='\\') 2<li7c59  
  m_Path+="\\"; @HT% n  
 UpdateData(FALSE); {-ZFp  
} jNu9KlN  
#btLa\HJ  
void CCaptureDlg::SaveBmp() 0fc/wfv <  
{ 0?sRDYaX;c  
 CDC dc; aHlcfh9|  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); nJbtS#`G4  
 CBitmap bm; _4TH4~cY  
 int Width=GetSystemMetrics(SM_CXSCREEN); qd+h$ "p  
 int Height=GetSystemMetrics(SM_CYSCREEN); W>!_|[a  
 bm.CreateCompatibleBitmap(&dc,Width,Height); 2#o>Z4 r{  
 CDC tdc; A2^\q>_#  
 tdc.CreateCompatibleDC(&dc); jATI&oX  
 CBitmap*pOld=tdc.SelectObject(&bm); cbeLu'DWB.  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); #u2J;9P  
 tdc.SelectObject(pOld); "-_fv5jL  
 BITMAP btm; ]FD'5p{  
 bm.GetBitmap(&btm); t'9*R7=  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; u?>B)PW  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); DQMHOd7g  
 BITMAPINFOHEADER bih; R,)}>X|<  
 bih.biBitCount=btm.bmBitsPixel; ?/TSi0R  
 bih.biClrImportant=0; 'iy*^A `Y  
 bih.biClrUsed=0; 0$_oT;{8  
 bih.biCompression=0; YiYV>gaf"H  
 bih.biHeight=btm.bmHeight; vK(i 9>;7  
 bih.biPlanes=1; lW<PoT  
 bih.biSize=sizeof(BITMAPINFOHEADER); |4 v0:ETb$  
 bih.biSizeImage=size; AGH|"EWG  
 bih.biWidth=btm.bmWidth; +$X#q8j06  
 bih.biXPelsPerMeter=0; A3vUPWdDk  
 bih.biYPelsPerMeter=0; tcI}Ca>u  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); x2@U.r"zo  
 static int filecount=0; ?!wgH9?8  
 CString name; 'jmTXWq*  
 name.Format("pict%04d.bmp",filecount++); "dsU>3u  
 name=m_Path+name; } $uxJB  
 BITMAPFILEHEADER bfh; Mb"J@5P[4  
 bfh.bfReserved1=bfh.bfReserved2=0; aqYa{hXio  
 bfh.bfType=((WORD)('M'<< 8)|'B'); : k7uGD  
 bfh.bfSize=54+size; 6`!Fv-  
 bfh.bfOffBits=54; gWrgnlq  
 CFile bf; qZ]pq2G  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ : m)   
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); ub7zA!%  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); 6``'%S'#  
  bf.WriteHuge(lpData,size); z?>D_NLX6  
  bf.Close(); iQ4);du  
  nCount++; H(2!1?N+  
 } ".SJ~`S  
 GlobalFreePtr(lpData); ;GVV~.7/  
 if(nCount==1) $jm>:YD  
  m_Number.Format("%d picture captured.",nCount); / y A7%2  
 else O_cbP59Y.  
  m_Number.Format("%d pictures captured.",nCount); _8Z_`@0  
  UpdateData(FALSE); j>]nK~[ka  
} kgy:Q'  
4VHqBQ4  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) ;^ La"m  
{ xBUya4w  
 if(pMsg -> message == WM_KEYDOWN) HODz*pI  
 { /R~1Zj2&  
  if(pMsg -> wParam == VK_ESCAPE) *4U^0e  
   return TRUE; Jo$G,Q  
  if(pMsg -> wParam == VK_RETURN) IGS1|  
   return TRUE; rm4.aO~-F  
 } vy_D>tp  
 return CDialog::PreTranslateMessage(pMsg); '7D,m H  
} ?notxE7 ]  
:[\v  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) baJxU:Y=p  
{ W3Dc r@Dy  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ v$(lZa1  
  SaveBmp(); 61/.K_%I.  
  return FALSE; WX}xmtLs  
} F.-R r  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ .fN"@l  
 CMenu pop; BYTnrPA&Z;  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); (T>nPbv)  
 CMenu*pMenu=pop.GetSubMenu(0); %)[+%57{  
 pMenu->SetDefaultItem(ID_EXITICON); o }3uo6GIB  
 CPoint pt; fGw^:,B  
 GetCursorPos(&pt); A,V\"KU  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); BYO"u6  
 if(id==ID_EXITICON) chV9_(8  
  DeleteIcon();  %ObLWH'  
 else if(id==ID_EXIT) Dq36p${ \W  
  OnCancel(); P&j (,7  
 return FALSE; )+6v  
} psnTFe  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); K`/`|1  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) YY&l?*M<  
 AddIcon(); |} {B1A  
 return res; Ubh{!Y  
} VR+<v   
l IUuA  
void CCaptureDlg::AddIcon() GuGOePV  
{ #VB')^d<U  
 NOTIFYICONDATA data; AK= h[2(  
 data.cbSize=sizeof(NOTIFYICONDATA); >$ NDv  
 CString tip; >*-FV{{  
 tip.LoadString(IDS_ICONTIP); lc2i`MC  
 data.hIcon=GetIcon(0); Z4A!U~  
 data.hWnd=GetSafeHwnd(); W%.v.0   
 strcpy(data.szTip,tip); j [rB"N`0  
 data.uCallbackMessage=IDM_SHELL; |,#t^'S!  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; rsF\JQk  
 data.uID=98; J4"mK1N(  
 Shell_NotifyIcon(NIM_ADD,&data); -+7uy.@cS  
 ShowWindow(SW_HIDE); ?lbH02P{v  
 bTray=TRUE; ;<$H)`*  
} !/^-;o7  
7_.11$E=H  
void CCaptureDlg::DeleteIcon() ,g7.rEA  
{ a-"k/P#  
 NOTIFYICONDATA data; "V>R9dO{"!  
 data.cbSize=sizeof(NOTIFYICONDATA); Cw~RJ^a_  
 data.hWnd=GetSafeHwnd(); cTXri8K_  
 data.uID=98; `((Yc]:7  
 Shell_NotifyIcon(NIM_DELETE,&data); G0`h%  
 ShowWindow(SW_SHOW); #l4)HV  
 SetForegroundWindow(); Kx. X7R  
 ShowWindow(SW_SHOWNORMAL); MZpK~c1`  
 bTray=FALSE; Mmo6MZ^  
} Q\GDrdA  
K,6b3kk  
void CCaptureDlg::OnChange() N0K){  
{ wO:Sg=,  
 RegisterHotkey();  U3izvM  
} 26dUA~|KJ  
S@}1t4Ls:  
BOOL CCaptureDlg::RegisterHotkey() "]m+z)lWd  
{ Vo9F  
 UpdateData(); dWX stb:[  
 UCHAR mask=0; cXR1grz  
 UCHAR key=0; (]RM6i7  
 if(m_bControl) Q.9qImgN  
  mask|=4; 5GA\xM-  
 if(m_bAlt) LAP6U.m'd  
  mask|=2; 6ns! ~g@  
 if(m_bShift) kM'"4[,nz  
  mask|=1; "F3]X)}  
  key=Key_Table[m_Key.GetCurSel()]; HxB m~Lcqy  
 if(bRegistered){ 3)ma\+< 6  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); 28hHabd|  
  bRegistered=FALSE; d\H&dkpH  
 } gP-nluq  
 cMask=mask; 6vp *9  
 cKey=key; ]l@ qra  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); q;fKcblKj  
 return bRegistered; l"{Sm6:;-  
} X*g(q0N<S  
>Jw6l0z  
  四、小结 qC_mu)6  
u>Rb ?`  
  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