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
  • 7043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: ~"Su2{"8B  
  RJ-J/NhWyI  
  一、实现方法 z%nplG'~|  
KuF>2KX~Y  
  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: )K]<\Q[  
od^o9(.W^  
#pragma data_seg("shareddata") %"ehZ d0r  
HHOOK hHook =NULL; //钩子句柄 {5 3#Xd  
UINT nHookCount =0; //挂接的程序数目 vcZ"4%w  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 Y=/;7T  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 4m%Yck{R  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey s6DPb_,  
static int KeyCount =0; 9fYof  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 +1K= ]#a  
#pragma data_seg() L+lX$k  
YXg^t$  
  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。 ?z3|^oU~d  
p::`1  
  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: >ktekO:H  
D7Ds*X`!l  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR P!!:p2fo  
cKey,UCHAR cMask) [4-u{Tu  
{ {5SJ0'.B2g  
 BOOL bAdded=FALSE; )o;n2T#O  
 for(int index=0;index<MAX_KEY;index++){ =%{E^z>1  
  if(hCallWnd[index]==0){ PI)uBA;  
   hCallWnd[index]=hWnd; <U}25AR  
   HotKey[index]=cKey; b(A;mt#N  
   HotKeyMask[index]=cMask; ]_hXg*?  
   bAdded=TRUE; j?(@x>HA  
   KeyCount++; RPkOtRKL=w  
   break; h: zi8;(  
  } 0Hr)h{!F"  
 } LufZ,  
 return bAdded; bQwiJ`B&  
} Q[bIkvr|  
//删除热键 V6b)  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) h)T-7b  
{ h}%yG{'/M=  
 BOOL bRemoved=FALSE; aT=V/Xh}d  
 for(int index=0;index<MAX_KEY;index++){ pXe]hnY  
  if(hCallWnd[index]==hWnd){ 6K5KkEp  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ e{,[\7nF  
    hCallWnd[index]=NULL; cKAZWON8;v  
    HotKey[index]=0; @"`{Sh`Y$  
    HotKeyMask[index]=0; Y0nuwX*{  
    bRemoved=TRUE; <$`ud P@  
    KeyCount--; Xqas[:)7+  
    break; MP`WU}2  
   } .w)T2(  
  } >V3pYRA   
 } U=UnE"h  
 return bRemoved; sJYs{Wm  
} %suXp,j  
0N3S@l#,\A  
<txzKpM  
  DLL中的钩子函数如下: "O{:jfq  
^ P=CoLFa  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) _:9-x;0H2  
{ "zN]gz=OV>  
 BOOL bProcessed=FALSE; )IZ~!N|-w  
 if(HC_ACTION==nCode) vM2\tL@"  
 { yO0 9NQ 5u  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 s)|l-I  
   switch(wParam) O:G-I$F|  
   {  {~:F1J~=  
    case VK_MENU: VUGVIy.  
     MaskBits&=~ALTBIT; 5>[ j^g+@  
     break; >a1 ovKF  
    case VK_CONTROL: AT,?dxP J  
     MaskBits&=~CTRLBIT; c95{Xy  
     break; |CjE }5Op>  
    case VK_SHIFT:  W,)qE^+  
     MaskBits&=~SHIFTBIT; 5VPP 2;J  
     break; GGchNt  
    default: //judge the key and send message pxs`g&3yd  
     break; j*;/Cah]k  
   } x kebel`%  
   for(int index=0;index<MAX_KEY;index++){ g3uI1]QXLg  
    if(hCallWnd[index]==NULL) EYF]&+ 9  
     continue; kT6EHuB  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) })}-K7v1+  
    { G!IJ#|D:~  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); : S |)  
     bProcessed=TRUE; K.jm>]'z4;  
    } c{t(),nAA  
   } (T0%H<#+  
  } K|LS VN?K  
  else if((lParam&0xc000ffff)==1){ //有键按下 .%EEly  
   switch(wParam) +Udlt)H  
   { L`{EXn[  
    case VK_MENU: &O.S ;b*+  
     MaskBits|=ALTBIT; v><uHjP  
     break; U0W- X9>y  
    case VK_CONTROL: *QpKeI  
     MaskBits|=CTRLBIT; I|?Z.!I|  
     break; 675x/0}GO  
    case VK_SHIFT: Fu cLcq2Z  
     MaskBits|=SHIFTBIT; hkL[hD  
     break; 8TnByKZz  
    default: //judge the key and send message ~V4&l3o  
     break; y(RK|r  
   } 0Ie9T1D=  
   for(int index=0;index<MAX_KEY;index++){ .v:K`y;f\(  
    if(hCallWnd[index]==NULL) ]%5DuE\M8\  
     continue; W=EvEx^?%  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) K) "cwk-  
    { Q!VPk~~(  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); 3 # ua  
     bProcessed=TRUE; <ctn_"p Z  
    } [UHDN:y  
   } (9J,Qs[;  
  } nUvxO `2  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 @"#W\m8  
   for(int index=0;index<MAX_KEY;index++){ lS(?x|dO  
    if(hCallWnd[index]==NULL) @u2nG:FG  
     continue; \ oIVE+L/P  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) 81|Xg5g)b  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); ]S~Z8T-[  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 Dyj5a($9"{  
   } \5_7!.  
  } &@xixbg  
 } U/oncC5  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); 4yH=dl4=44  
} FPu"/4v&  
=,~h]_\_  
  抓图程序是一个基于对话框的程序,它在建立对话框的时候调用前面的DLL,登记热键,因此需要将hook.lib添加到工程里,在程序里给出两个DLL函数的定义,也可以写个头文件,再包含进来以下代码: :,=no>mMx  
v&B*InR?+  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); /0mbG!Ac  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); +BRmqJ3  
HX{O@  
  为了添加应用程序对热键通知事件的响应,程序中用的办法是重载WindowProc()函数,该函数代码如下: >]k'3|vV  
YGObTIGJvf  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) oP".>g-.  
{ [2!K 6  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) 2 c <Qh=  
 { %jY /jp=R  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 n@xDFa  
  SaveBmp(); j#b?P=|l  
  return FALSE; :hG?} [-2  
 } !0~$u3[b  
 …… //其它处理及默认处理 vb}; _/ #?  
} sSi1;9^o  
por[p\M.  
]iuM2]  
  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。 x aWmwsym  
P.RlozF5;  
  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。 ":*PC[)W  
;jTP|q?|{  
  二、编程步骤 hp}J_/+4n  
@U%I 6 t  
  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"; ~n84x  
0EYK3<k9!  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; ' @M  
dm&F1NkT  
  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; d9[*&[2J|  
0!rU,74I=  
  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; H'$g!Pg  
 XGEAcN  
  5、 添加代码,编译运行程序。 !p1OBS|  
Gv}*T w$  
三、程序代码 Pt?]JJxl-  
DEaO= p|  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL ZN|DR|c UY  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) qbkvwL9  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ @M?N[LG  
#if _MSC_VER > 1000 A:1O:LB=!  
#pragma once ky#d`   
#endif // _MSC_VER > 1000 d^IOB|6Q  
#ifndef __AFXWIN_H__ :QsGwhB  
#error include 'stdafx.h' before including this file for PCH gO?+:}!  
#endif /b20!3  
#include "resource.h" // main symbols glh2CRUj  
class CHookApp : public CWinApp "';'*x  
{ z_eP  
 public: 5,'?NEyw  
  CHookApp(); [SgP1>M  
  // Overrides r:y *l4  
  // ClassWizard generated virtual function overrides h%(dT/jPL)  
  //{{AFX_VIRTUAL(CHookApp) {>G\3|^D  
 public: s@f4f__(]  
  virtual BOOL InitInstance(); 0yXUVKq3  
  virtual int ExitInstance(); Z bxd,|<|  
  //}}AFX_VIRTUAL 7Rj!vj/  
  //{{AFX_MSG(CHookApp) 28-6(oG  
  // NOTE - the ClassWizard will add and remove member functions here. *~fZ9EkD  
  // DO NOT EDIT what you see in these blocks of generated code ! |^Z1 D TAw  
  //}}AFX_MSG L*9^-,  
  DECLARE_MESSAGE_MAP() n6[bF "v  
}; r^ &{0c&o  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); 46*o_A,"  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); tn;e PcU  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); 6z"fBF  
BOOL InitHotkey(); $GUSTV  
BOOL UnInit(); XZA3T Z  
#endif fSl+;|K n  
}#q9>gx  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. *8U+2zgfC  
#include "stdafx.h" b/'fC%o,  
#include "hook.h" t/_w}  
#include <windowsx.h> -c%GlpZw  
#ifdef _DEBUG 52tIe|KwL  
#define new DEBUG_NEW R 3 Eh47  
#undef THIS_FILE =V_} z3b  
static char THIS_FILE[] = __FILE__; $ # @G!  
#endif }+QgRGQ  
#define MAX_KEY 100 /]T#@>('  
#define CTRLBIT 0x04 Xcicqywe?  
#define ALTBIT 0x02 X_|8CD-@6  
#define SHIFTBIT 0x01 P@p(Y2&~g  
#pragma data_seg("shareddata") 1#Dpj.cO#  
HHOOK hHook =NULL; #18H Z4N  
UINT nHookCount =0; m1VyYG  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey `,aPK/  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT PX[taDN  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey ^M  PU?k  
static int KeyCount =0; 1okL]VrI  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift abWmPi  
#pragma data_seg() rZe"*$e  
HINSTANCE hins; IO`.]iG  
void VerifyWindow(); >f19P+  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) 57)S"  
//{{AFX_MSG_MAP(CHookApp) s7SW4ff1  
// NOTE - the ClassWizard will add and remove mapping macros here. 4kNf4l9Y  
// DO NOT EDIT what you see in these blocks of generated code! BkJV{>?_+  
//}}AFX_MSG_MAP HLAWx/c,j"  
END_MESSAGE_MAP() ,$mnD@)  
G|Ic6Sd  
CHookApp::CHookApp() c&3 ]%urL  
{ vML01SAi  
 // TODO: add construction code here, 9]VUQl9gh  
 // Place all significant initialization in InitInstance xqO'FQO%  
} RERum  
zVZZdG~8  
CHookApp theApp; hv}rA,Yd  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) #wNksh/J^  
{ q*Yh_IT.I  
 BOOL bProcessed=FALSE; /P5w}n  
 if(HC_ACTION==nCode) a =*(>=  
 { NUEy0pLw  
  if((lParam&0xc0000000)==0xc0000000){// Key up OTL=(k  
   switch(wParam) {~k /xM.-  
   { bec n$R  
    case VK_MENU: N/TU cG|m\  
     MaskBits&=~ALTBIT; }q G{1Er  
     break; &'N{v@Oi)  
    case VK_CONTROL: d%81}4f:  
     MaskBits&=~CTRLBIT; c7q1;X{:  
     break; %(Nu"3|$K=  
    case VK_SHIFT: ._~_OVU  
     MaskBits&=~SHIFTBIT; (X,Ua+{  
     break; '73dsOTIT  
    default: //judge the key and send message 4VSlgoz  
     break; i RS )Z )  
   } ?zQ\u{]=  
   for(int index=0;index<MAX_KEY;index++){ c\-5vw||b  
    if(hCallWnd[index]==NULL) syA*!Up  
     continue; CVo@zr$  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) K\nN2y  
    { d47b&.v8e  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); 5.]+K<:h"A  
     bProcessed=TRUE; vJ7I [Z  
    } LgjL+w19  
   } "'4R _R  
  } X~sl5?  
  else if((lParam&0xc000ffff)==1){ //Key down ,_r"=>?@  
   switch(wParam) dZIAotHN:  
   { H`njKKdR  
    case VK_MENU: 7UejK r  
     MaskBits|=ALTBIT; m(s(2wq"f  
     break; G`8gI)$u  
    case VK_CONTROL: iP~5=  
     MaskBits|=CTRLBIT; LpGplD lB  
     break; #gMMh B=  
    case VK_SHIFT: #Bg88!-4  
     MaskBits|=SHIFTBIT; CuR\JKdRo  
     break; ]IoJ(4f  
    default: //judge the key and send message '+?AaR&p?  
     break; ?!U=S=8  
   } e ,/I}W  
   for(int index=0;index<MAX_KEY;index++) u&/q7EBfP  
   { l{>fma]7  
    if(hCallWnd[index]==NULL) Uy5IvG;O+  
     continue; =zDU!< U  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) @ JZ I  
    { ?FVX &{{V  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); w>p0ldi  
     bProcessed=TRUE; @v ss:'l  
    } #M$[C d I$  
   } UZi^ &  
  } gYA|JFi  
  if(!bProcessed){ zIi|z}WJ  
   for(int index=0;index<MAX_KEY;index++){ TUIj-HSe  
    if(hCallWnd[index]==NULL) bTHKMaGWC  
     continue; c$rkbbf~V  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) 0Jm6 r4s?  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); KiT>W~  
   } ,a eQXI#@  
  } 8;ke,x  
 } S(.AE@U  
 return CallNextHookEx( hHook, nCode, wParam, lParam );  iE=Yh  
} K:Wxx "  
%I9{)'+@x  
BOOL InitHotkey() X|q&0W=  
{ rIH/<@+  
 if(hHook!=NULL){ 'C8VD+p  
  nHookCount++; "=@b>d6U+  
  return TRUE; n.ZLR=P4  
 } 8i!AJF9IQ}  
 else L{jJDd  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); E0'+]"B  
  if(hHook!=NULL) = I,O+^  
   nHookCount++; VLC<ju!  
  return (hHook!=NULL); B]L5K~d  
} U&yXs'3a&  
BOOL UnInit() .+MJ' bW  
{ <+o-{{E[  
 if(nHookCount>1){ jl;_lcO  
  nHookCount--; rL3<r  
  return TRUE; mEfI2P)#|  
 } Py$Q]s?\1  
 BOOL unhooked = UnhookWindowsHookEx(hHook); au@ LQxKQ  
 if(unhooked==TRUE){ ,;)Y 1q}Q  
  nHookCount=0; }l~|c{WH`  
  hHook=NULL; L^i=RGx  
 } Nz_c]3_j  
 return unhooked; 7cW9@xPe  
} X ,n4_=f  
&lbxmUeU  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) <`k\kZM  
{ Ni#!C:q  
 BOOL bAdded=FALSE; {e\Pd!D?|  
 for(int index=0;index<MAX_KEY;index++){ lPx4=O  
  if(hCallWnd[index]==0){ /ts=DxCC;  
   hCallWnd[index]=hWnd; 11[[Hk X@  
   HotKey[index]=cKey; reR><p  
   HotKeyMask[index]=cMask; C,~wmS )@  
   bAdded=TRUE; 1j0OV9-|  
   KeyCount++; \ZX5dFu0  
   break; _x&;Fa%  
  } gD10C,{  
 } {a^A-Xh[u  
 return bAdded; 0B fqEAl  
} o(w!x!["  
k4fc 5P  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) n|2`y?  
{ Z>gxECi  
 BOOL bRemoved=FALSE; `bT!_Ru  
 for(int index=0;index<MAX_KEY;index++){ Wt4ROj  
  if(hCallWnd[index]==hWnd){ Gdmh#pv  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ T6m#sVq  
    hCallWnd[index]=NULL; C~4_Vc*  
    HotKey[index]=0; :Rv ?>I j  
    HotKeyMask[index]=0; r8g4NsRVtv  
    bRemoved=TRUE; ;iR( Ir  
    KeyCount--; tvXoF;Yq  
    break; I$/*Pt];  
   } ^]l^q'?>:  
  } PPk\W7G  
 } <~;;iM6  
 return bRemoved; '{dduHo  
} %E#OUo[y/  
#<0Yx9Jh.  
void VerifyWindow() 59mNb:<  
{ K~ ,| ~  
 for(int i=0;i<MAX_KEY;i++){ ZycV?ob8}  
  if(hCallWnd!=NULL){ s3qWTdM  
   if(!IsWindow(hCallWnd)){ nfpkWyIu{  
    hCallWnd=NULL; @)PA9P |  
    HotKey=0; xxkU u6x#  
    HotKeyMask=0; /WlK*8C  
    KeyCount--; nv&uhu/q  
   } 1{+x >Pv:  
  } g?N~mca$  
 } @)s;u}H  
} Ot}fGiio  
)OQhtxK  
BOOL CHookApp::InitInstance() WeDeD\zy  
{ maAZI-H{  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); e9e%8hL  
 hins=AfxGetInstanceHandle(); z@;]Hy  
 InitHotkey();  W%LTcm  
 return CWinApp::InitInstance(); ?&;d#z*4  
} KilgeN:  
CvfX m  
int CHookApp::ExitInstance() S^q)DuF5!  
{ HDQhXw!!hc  
 VerifyWindow(); [ []'U'  
 UnInit(); )Y%>t  
 return CWinApp::ExitInstance(); vvA=:J4/i)  
} M S 3?#b  
Y<|!)JLB2  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file J-*&&  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) Td#D\d\R  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ J)1:jieQ  
#if _MSC_VER > 1000 q/y4HT,x  
#pragma once O@JgVdgf  
#endif // _MSC_VER > 1000 L%](C  
^0"^Xk*  
class CCaptureDlg : public CDialog K&FGTS,  
{ VBc[(8o  
 // Construction n]M1'yU  
 public: v|5:;,I  
  BOOL bTray; s( @w1tS.  
  BOOL bRegistered; $=dp)  
  BOOL RegisterHotkey();  .G}E  
  UCHAR cKey; (<sZ8n=AD  
  UCHAR cMask; m87,N~DP  
  void DeleteIcon(); TDI8L\rr  
  void AddIcon(); B$~oZ'4v  
  UINT nCount; tX;00g;U.  
  void SaveBmp(); o(xRq;i  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor [8*Ovd  
  // Dialog Data n}==  
  //{{AFX_DATA(CCaptureDlg) 2 qRX A  
  enum { IDD = IDD_CAPTURE_DIALOG }; /lAB  
  CComboBox m_Key; 8 vNgePn  
  BOOL m_bControl; :xw2\:5~0  
  BOOL m_bAlt; nb(4"|8}  
  BOOL m_bShift; b?Wg|D  
  CString m_Path; jvx9b([<sG  
  CString m_Number; 3/I Q]8g"  
  //}}AFX_DATA }Ictnb  
  // ClassWizard generated virtual function overrides AH`n  
  //{{AFX_VIRTUAL(CCaptureDlg) u#5/s8  
 public: :LRR\v0HM  
  virtual BOOL PreTranslateMessage(MSG* pMsg); l@` D;m  
 protected: a]:tn:q  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support & pwSd  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); 8f>=.O*)  
  //}}AFX_VIRTUAL }*Qd]\fy  
  // Implementation 4GJ1P2  
 protected: T!$7:% D  
  HICON m_hIcon; 1lyJ;6i6L  
  // Generated message map functions Tks;,C  
  //{{AFX_MSG(CCaptureDlg) &{QB}r  
  virtual BOOL OnInitDialog(); 1?)iCe  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); zM6 yUEg  
  afx_msg void OnPaint();  {ZFa +  
  afx_msg HCURSOR OnQueryDragIcon(); $,08y   
  virtual void OnCancel(); \V@SCA'  
  afx_msg void OnAbout(); *Yv"lB8  
  afx_msg void OnBrowse(); 2&91C[da0  
  afx_msg void OnChange(); $;un$ko6%  
 //}}AFX_MSG <B 5^  
 DECLARE_MESSAGE_MAP() 8>x.zO_.c>  
}; &_FNDJ>MCk  
#endif `;fh<kv  
PK1j$ &F  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file hT6:7 _UD  
#include "stdafx.h" *ggTTHy  
#include "Capture.h" gd<8RVA  
#include "CaptureDlg.h" 04tUf3 >  
#include <windowsx.h> AIsM:sV]  
#pragma comment(lib,"hook.lib") 2'g< H-[  
#ifdef _DEBUG =fMSmn1S  
#define new DEBUG_NEW O{8"f\*  
#undef THIS_FILE b3b 4'l   
static char THIS_FILE[] = __FILE__; hTI8hh  
#endif z.1 6%@R  
#define IDM_SHELL WM_USER+1 ]i*q*]x2u  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); &QE^i%6>\  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); ';V(sRU@  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; I^Ichn  
class CAboutDlg : public CDialog Y0BvN`E  
{ hM E|=\  
 public: :b>Z|7g?  
  CAboutDlg(); Wq)'0U;{$  
  // Dialog Data A{h hnrr8  
  //{{AFX_DATA(CAboutDlg) , >Y. !  
  enum { IDD = IDD_ABOUTBOX }; o^RdVSkU;  
  //}}AFX_DATA U[d/ `  
  // ClassWizard generated virtual function overrides FcIH<_r  
  //{{AFX_VIRTUAL(CAboutDlg) $}oQ=+c5  
 protected: e<5+&Cj  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support T~$ePVk>L  
  //}}AFX_VIRTUAL V2es.I  
  // Implementation zc J]US  
 protected: G_5sF|(mq  
  //{{AFX_MSG(CAboutDlg) OxElvbM#  
  //}}AFX_MSG +C;ZO6%w  
  DECLARE_MESSAGE_MAP() )|LX_kyW  
}; /og}e~q  
wlqV1.K  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) <0P`ct0,i  
{ EC1q#;:  
 //{{AFX_DATA_INIT(CAboutDlg) ,2JqX>On>Y  
 //}}AFX_DATA_INIT ~m!>e])P?X  
} !N$4.slr<p  
=D5@PHpv(  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) p@i U}SUaE  
{ qNHS 1  
 CDialog::DoDataExchange(pDX); w GZ(bKyO  
 //{{AFX_DATA_MAP(CAboutDlg) =\4w" /Y  
 //}}AFX_DATA_MAP 7g ]]>  
} ulfpop*2  
NOyLZa'  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) QXJD' c  
 //{{AFX_MSG_MAP(CAboutDlg) ZC"6B(d  
 // No message handlers ([|5(Omd\  
 //}}AFX_MSG_MAP +^YV>;  
END_MESSAGE_MAP() _if&a'  
?y<n^`  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) XeDU ,  
: CDialog(CCaptureDlg::IDD, pParent) I#eIm3Y?  
{ R,Zuy( g  
 //{{AFX_DATA_INIT(CCaptureDlg) hD<z^j+  
  m_bControl = FALSE; lk.Q6saI1  
  m_bAlt = FALSE; };oRx)  
  m_bShift = FALSE; zQ{ Q>"-  
  m_Path = _T("c:\\"); k`g+    
  m_Number = _T("0 picture captured."); w2]1ftY  
  nCount=0; `RGZ-Q{_  
  bRegistered=FALSE; &8"a7$  
  bTray=FALSE; ^\N2 Iu>6  
 //}}AFX_DATA_INIT p5F[( H|9  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 ^%_B'X9  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); 74gU 4T  
} RB/[(4  
6./&l9{h+  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) >qtB27jV  
{ aS~k.^N  
 CDialog::DoDataExchange(pDX); "vLqYc4$  
 //{{AFX_DATA_MAP(CCaptureDlg) R2]?9\II  
  DDX_Control(pDX, IDC_KEY, m_Key); W[^XG\  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); l^$:R~gS  
  DDX_Check(pDX, IDC_ALT, m_bAlt); d,<ctd  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); t ?bq ~!X  
  DDX_Text(pDX, IDC_PATH, m_Path); EzNmsbtZ(  
  DDX_Text(pDX, IDC_NUMBER, m_Number); g-^CuXic  
 //}}AFX_DATA_MAP 0@AK  
} yv3my aS  
!@VmaAT  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) rcI(6P<*  
//{{AFX_MSG_MAP(CCaptureDlg) B|extWwu  
 ON_WM_SYSCOMMAND() B/5C jHz  
 ON_WM_PAINT() 0w+hf3K+:  
 ON_WM_QUERYDRAGICON() k9^P#l@p  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) O)9T|, U  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) 8 6L&u:o:  
 ON_BN_CLICKED(ID_CHANGE, OnChange) 6 Dg[ b  
//}}AFX_MSG_MAP 1GEE^Eu  
END_MESSAGE_MAP() vO0ql  
Q 5@~0  
BOOL CCaptureDlg::OnInitDialog() 3tr?-l[N\  
{ .f jM9G#  
 CDialog::OnInitDialog(); K] Eq"3  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); Q;aZpi-E"  
 ASSERT(IDM_ABOUTBOX < 0xF000); l>=c]  
 CMenu* pSysMenu = GetSystemMenu(FALSE); M/1Q/;0P  
 if (pSysMenu != NULL) r`S]`&#}(  
 { JWn9&WK  
  CString strAboutMenu; "jeJV,%  
  strAboutMenu.LoadString(IDS_ABOUTBOX); 8tdUnh%/  
  if (!strAboutMenu.IsEmpty()) sWX   
  { %< W1y  
   pSysMenu->AppendMenu(MF_SEPARATOR); ;^rZ"2U l  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); CiMy_`H  
  } 3i s .c)  
 } cA/2,i  
 SetIcon(m_hIcon, TRUE); // Set big icon dUe"qH29s  
 SetIcon(m_hIcon, FALSE); // Set small icon {Ua5bSbh  
 m_Key.SetCurSel(0); {X"X.`p  
 RegisterHotkey(); =r_ S MTu  
 CMenu* pMenu=GetSystemMenu(FALSE); Mb<KZ_wYOX  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); @{ nT4{  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); Vm6^'1CY  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); u*9C(je  
 return TRUE; // return TRUE unless you set the focus to a control }XXE hOO  
} k"sL.}$  
QY^ y(I49  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) EI_J7J+  
{ 2XI%4  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) vW4 f3(/  
 { @C!q S7k)  
  CAboutDlg dlgAbout; 2#E;5UYu  
  dlgAbout.DoModal(); [ 0~qs|27  
 } '.dW>7  
 else Mq7|37(N[  
 { ' l!QGKz  
  CDialog::OnSysCommand(nID, lParam); I+<`}  
 } T4f:0r;^f*  
} qh&K{r*T  
)b-G2< kb  
void CCaptureDlg::OnPaint() FCP5EN  
{ t*<c+Ixu  
 if (IsIconic()) 9<YB &:<  
 { 8ziYav  
  CPaintDC dc(this); // device context for painting 2xnOWW   
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); _ Po9pZ  
  // Center icon in client rectangle WI6er;D  
  int cxIcon = GetSystemMetrics(SM_CXICON); _E "[%  
  int cyIcon = GetSystemMetrics(SM_CYICON); utTek5/  
  CRect rect; r;'!qwr  
  GetClientRect(&rect); [cH/Y2[  
  int x = (rect.Width() - cxIcon + 1) / 2; J\{)qJ*jp  
  int y = (rect.Height() - cyIcon + 1) / 2; MUo?ajbqOd  
  // Draw the icon ~ACB #D%  
  dc.DrawIcon(x, y, m_hIcon); >Y,7>ahyt  
 } *PI3L/*  
 else 3gM{lS}h#  
 {  qJK^i.e  
  CDialog::OnPaint(); 2cDC6rul  
 } Wu}Co  
} ._R82 gy  
"d#s|_n,d)  
HCURSOR CCaptureDlg::OnQueryDragIcon() #zQkQvAT9  
{ rvG qUmSUs  
 return (HCURSOR) m_hIcon; cK258mY  
} NMDNls&)k  
O]Hg4">f  
void CCaptureDlg::OnCancel() YM;^c% _7  
{ Oh^X^*I$@  
 if(bTray) 8%NX)hZyq}  
  DeleteIcon(); q"cFw${  
  CDialog::OnCancel(); |z4/4Y@  
} H}@|ucM"\  
2KG j !w  
void CCaptureDlg::OnAbout() p<+]+,|\~:  
{ W`\H3?C`xQ  
 CAboutDlg dlg; Po_9M4kU  
 dlg.DoModal(); u,pm\  
} >}I}9y+  
}+B7C2_\  
void CCaptureDlg::OnBrowse() \x+DEy'4;5  
{ @<2pYIi 8  
 CString str; *p-Fn$7\n  
 BROWSEINFO bi; }Q%>Fv  
 char name[MAX_PATH]; L=p.@VSZ  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); +-Dd*yD6<  
 bi.hwndOwner=GetSafeHwnd(); c`>\R<Z ]  
 bi.pszDisplayName=name; xvkof 'Q)  
 bi.lpszTitle="Select folder"; yO6i "3  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; u7;A`  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); i~.[iZf|  
 if(idl==NULL) F>M$|Sc2  
  return; zPmVECS  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); _c&*'IY[V  
 str.ReleaseBuffer(); 4EpzCaEZ  
 m_Path=str; Za} |Ee  
 if(str.GetAt(str.GetLength()-1)!='\\') m^=, RfUUd  
  m_Path+="\\"; f 4 _\F/  
 UpdateData(FALSE); izKk@{Md  
} 5A)w.i&V  
GBQb({  
void CCaptureDlg::SaveBmp() `%=Jsi0.Nq  
{ RpXQi*c0  
 CDC dc; l=oVC6C  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); x B?:G  
 CBitmap bm; -r2cK{Hhp&  
 int Width=GetSystemMetrics(SM_CXSCREEN); cU>&E* wD  
 int Height=GetSystemMetrics(SM_CYSCREEN); 7m jj%  
 bm.CreateCompatibleBitmap(&dc,Width,Height); d#*5U9\z  
 CDC tdc; Z^|C~lp;n  
 tdc.CreateCompatibleDC(&dc); bXfOZFzq)  
 CBitmap*pOld=tdc.SelectObject(&bm); "VeUOdNA>  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); d5%*^nMpY  
 tdc.SelectObject(pOld); 1^;h:,e6  
 BITMAP btm; rEf\|x=st:  
 bm.GetBitmap(&btm); "tark'  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; 4Rm3'Ch  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); g IKm  
 BITMAPINFOHEADER bih; w?*KO?K  
 bih.biBitCount=btm.bmBitsPixel; PYUY bRn  
 bih.biClrImportant=0; !$?@;}=  
 bih.biClrUsed=0; o ,!"E^  
 bih.biCompression=0; So^`L s;S  
 bih.biHeight=btm.bmHeight; L7g&]%  
 bih.biPlanes=1; vP4Ij  
 bih.biSize=sizeof(BITMAPINFOHEADER); s,k1KTXg<B  
 bih.biSizeImage=size; I Q L~I13  
 bih.biWidth=btm.bmWidth; HLk"a-+'  
 bih.biXPelsPerMeter=0; aC},h   
 bih.biYPelsPerMeter=0; S3'g(+S  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); U,M,E@  
 static int filecount=0; NQJqS?^W&M  
 CString name; \,EPsQV0?  
 name.Format("pict%04d.bmp",filecount++); VqrMi *W6  
 name=m_Path+name; P~<93  
 BITMAPFILEHEADER bfh; d{hYT\7~1(  
 bfh.bfReserved1=bfh.bfReserved2=0; G"[pr%?  
 bfh.bfType=((WORD)('M'<< 8)|'B'); 6'ZnyWb  
 bfh.bfSize=54+size; M;Rw]M  
 bfh.bfOffBits=54; ]*@$%iCPE  
 CFile bf; !VHIl&Mos  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ 5jQP"^g  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); Fdw[CYHz  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); ,OCTm%6e  
  bf.WriteHuge(lpData,size); Yel(}Ny  
  bf.Close(); 2P ?Iu&  
  nCount++; h%s  
 } h6e$$-_  
 GlobalFreePtr(lpData); rsv!mY,Em  
 if(nCount==1) r8%,xA&  
  m_Number.Format("%d picture captured.",nCount); C6M/$_l&a  
 else `.W;ptZ6  
  m_Number.Format("%d pictures captured.",nCount); DxgT]F%  
  UpdateData(FALSE); gk1S"H  
} orHD3T%&  
KUutC :  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) +I n"OR%  
{ g)A0PvEu  
 if(pMsg -> message == WM_KEYDOWN) f B96Q  
 { mv.I.EL  
  if(pMsg -> wParam == VK_ESCAPE) V^z;^mdd  
   return TRUE; )T5h\ZO`;  
  if(pMsg -> wParam == VK_RETURN)  ;"^9L  
   return TRUE; .^S78hr]n  
 } F\R}no5C  
 return CDialog::PreTranslateMessage(pMsg); cOZ^huK  
} }hitU(5t0  
kA;Tr4EA6  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) T:">,* |  
{ Iq]6]  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ Pu*HZW3l  
  SaveBmp(); 8VmN? "5v  
  return FALSE; 1!wEXH(  
} &i^NStqu  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ yn[ZN-H~  
 CMenu pop; b DS1'Ce  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); ^(JHRH~=h  
 CMenu*pMenu=pop.GetSubMenu(0); .GN$H>')  
 pMenu->SetDefaultItem(ID_EXITICON); "EYj Y->  
 CPoint pt; >Ron+ oe  
 GetCursorPos(&pt); r)]CZ])  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); 50aWFJYw  
 if(id==ID_EXITICON) &jZ|@K?  
  DeleteIcon(); Q3%# o+R>  
 else if(id==ID_EXIT) h;p%EZ  
  OnCancel(); |K;Txe_  
 return FALSE; %OW9cqL>l  
} Yb3f]4EH  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); p}DF$k%`  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) xO-U]%oq  
 AddIcon(); +7< >x-+  
 return res; ]MLLr'6?  
} y6Epi|8  
{dx /p-Tv  
void CCaptureDlg::AddIcon() 0o$HC86w  
{ wv.Ul rpx.  
 NOTIFYICONDATA data; s]vJUC,s  
 data.cbSize=sizeof(NOTIFYICONDATA); Sje0:;;|  
 CString tip; HL}~W}!j  
 tip.LoadString(IDS_ICONTIP); % rY8  
 data.hIcon=GetIcon(0); [F)/mN  
 data.hWnd=GetSafeHwnd(); 62l0 Z-  
 strcpy(data.szTip,tip); ,e FQ}&^A  
 data.uCallbackMessage=IDM_SHELL; 0 ;_wAk  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; JX/4=..  
 data.uID=98; vZeYp  
 Shell_NotifyIcon(NIM_ADD,&data); $`5lvy^  
 ShowWindow(SW_HIDE); tP Efz+1N  
 bTray=TRUE; rK QASRF5*  
} px }7If  
U?F^D4CV\  
void CCaptureDlg::DeleteIcon() hY= s9\  
{ JM-ce8U  
 NOTIFYICONDATA data; ?)[zLnxc&  
 data.cbSize=sizeof(NOTIFYICONDATA); J&"?m.~@  
 data.hWnd=GetSafeHwnd();  LbX6p  
 data.uID=98; aMvK8C%7  
 Shell_NotifyIcon(NIM_DELETE,&data); Dyk[u g5  
 ShowWindow(SW_SHOW); y^QYl ZO  
 SetForegroundWindow(); A]iv)C;]  
 ShowWindow(SW_SHOWNORMAL); k g,ys4  
 bTray=FALSE; .)@tXH=}+  
} n*m"L|:ff  
}K/}(zuy1Y  
void CCaptureDlg::OnChange() TjUZv1(L  
{ fAM D2C  
 RegisterHotkey(); ,B~lwF9  
} rbK#a)7  
_:g GD8  
BOOL CCaptureDlg::RegisterHotkey() S $_Y/x  
{ $EQT"ZX>%i  
 UpdateData(); [|[sYo  
 UCHAR mask=0; mfngbFa1  
 UCHAR key=0; |J<pLz  
 if(m_bControl) XiRT|%j  
  mask|=4; C9mzg  
 if(m_bAlt) ;o)=XEh8P  
  mask|=2; ]]uzl0LH  
 if(m_bShift) >C:"$x2"#(  
  mask|=1; nGv23R(?G  
  key=Key_Table[m_Key.GetCurSel()]; gR;8ht(pd(  
 if(bRegistered){ uspkn1-  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); ;c X^8;F0  
  bRegistered=FALSE; [-E{}FL|  
 } OY^n0Zof,  
 cMask=mask; -eR!qy:.]5  
 cKey=key; DrCWvpudd  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); :otY;n-  
 return bRegistered; [W9e>Nsp0  
} V5u}C-o  
MvZ+n  
  四、小结 <84C tv  
5y%un  
  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