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
  • 5401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: dikWk  
  6_y|4!,:W  
  一、实现方法 3'"M31iA  
op|mRJBq;  
  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: ~4>Xi* B  
&53#`WgJ  
#pragma data_seg("shareddata") <{U{pCT%  
HHOOK hHook =NULL; //钩子句柄 Fm;)7.% >  
UINT nHookCount =0; //挂接的程序数目 @\D D|o67  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 kdUGmR0d  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 hKTg~y^  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey )]%9Tgn  
static int KeyCount =0;  `JE>GZ Y  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 Me}TW!GC  
#pragma data_seg() #LN I&5  
\i,cL)HM  
  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。 rq1kj 8%2  
HEuM"2{DMM  
  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: *3/7wSV:  
IP'igX  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR @gqw]_W  
cKey,UCHAR cMask) `es($7}P_W  
{ @*DIB+K  
 BOOL bAdded=FALSE; p-pw*wH0  
 for(int index=0;index<MAX_KEY;index++){  (v`;ym  
  if(hCallWnd[index]==0){ #8z,'~\  
   hCallWnd[index]=hWnd; . ?p}:  
   HotKey[index]=cKey; 2 &Byq  
   HotKeyMask[index]=cMask; bNROXiX  
   bAdded=TRUE; ,OKM\N ,  
   KeyCount++; )R^Cqo'  
   break; qp W#!Vbx  
  } 2Z O'X9  
 } j>o +}p?3I  
 return bAdded; bJ|?5  
} =GQ^uVf1  
//删除热键 @ g75T`N  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) N4To#Q1w  
{ ys/mv'#>  
 BOOL bRemoved=FALSE; B\ _u${C  
 for(int index=0;index<MAX_KEY;index++){ _=L;`~=C9e  
  if(hCallWnd[index]==hWnd){ \u]CD}/  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ lkfFAwnc  
    hCallWnd[index]=NULL; k,7+=.6  
    HotKey[index]=0; 5ZA%,pH>Jq  
    HotKeyMask[index]=0; \ZFQ?e,d  
    bRemoved=TRUE; ?nZ <?  
    KeyCount--; Z% ;4Ed  
    break; >'6GcnEb4.  
   } 7I(t,AKJ  
  } %;Z bQ9  
 } |)q K g  
 return bRemoved; kP)o=\|W{z  
} ,0Zn hS)kq  
%EGr0R(  
^V}R(gDu}s  
  DLL中的钩子函数如下: B/=q_.1F>  
x~;EH6$5'/  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) tHtV[We.:  
{ /Tj"Fl\h  
 BOOL bProcessed=FALSE; !/}FPM_  
 if(HC_ACTION==nCode) `XxG"k\/S  
 { e(#IewKp  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 ?4ILl>*  
   switch(wParam) B#aH\$_U  
   {  EyPJvs  
    case VK_MENU: Z va  
     MaskBits&=~ALTBIT; jBv$^L  
     break; _?s %MNaX  
    case VK_CONTROL: yK077zH_  
     MaskBits&=~CTRLBIT; 8},<e>q  
     break; )@qup _M@  
    case VK_SHIFT: ^QAiySR`0  
     MaskBits&=~SHIFTBIT; 6!B^xm.R@  
     break; ch>Vv"G>  
    default: //judge the key and send message hoR=%pC*  
     break; FxfL+}?Q  
   } 3fxNV<  
   for(int index=0;index<MAX_KEY;index++){ ,<3uc  
    if(hCallWnd[index]==NULL) rAx"~l.=  
     continue; ns#~}2"d  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) b(RB G  
    { C4{\@v}t  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); 5!AV!A_Jp  
     bProcessed=TRUE; !\0F.*   
    } :,kU#eZ$-  
   } jJVT_8J  
  } Ud#X@xK<h  
  else if((lParam&0xc000ffff)==1){ //有键按下 nMG rG  
   switch(wParam) x=5P+_  
   { pDq#8*q+v  
    case VK_MENU: >+ ]R4  
     MaskBits|=ALTBIT; vJRnBq+y  
     break; =3|pHc hJ4  
    case VK_CONTROL: 1OJ*wI*  
     MaskBits|=CTRLBIT; @Y UY9+D&  
     break; 4;C*Fa  
    case VK_SHIFT: PW%1xHLfk  
     MaskBits|=SHIFTBIT; A XBkJ'jd  
     break; !:"-:O}>=,  
    default: //judge the key and send message fw' r.  
     break; ]U,CKJF%/  
   } >5;N64]!)  
   for(int index=0;index<MAX_KEY;index++){ 5VR.o!h3I  
    if(hCallWnd[index]==NULL) e&QS#k  
     continue; /vjGjb=3U  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) s=d+GMa  
    { \sK:W|yy  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); 5vTv$2@  
     bProcessed=TRUE; U:]MgZWn  
    } AkrTfi4hC  
   } fcRj  
  } yo'9x s  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 X>8-` p  
   for(int index=0;index<MAX_KEY;index++){ s`hav  
    if(hCallWnd[index]==NULL) 4:vTxNs&S  
     continue; z)lM2x>|*  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) ] @X{dc  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); 47IY|Jdz  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 qy_%~c87  
   } o+<29o  
  } upypxC  
 } fVe@YqNa  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); AnNP Ti  
} Y4#y34 We  
&<au/^F  
  抓图程序是一个基于对话框的程序,它在建立对话框的时候调用前面的DLL,登记热键,因此需要将hook.lib添加到工程里,在程序里给出两个DLL函数的定义,也可以写个头文件,再包含进来以下代码: _(C^[:s  
)Zas x6`  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); vsKl#R B  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); vwKw?Z0%J  
[O2h- `  
  为了添加应用程序对热键通知事件的响应,程序中用的办法是重载WindowProc()函数,该函数代码如下: +YTx   
./l|8o  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) .APVjqG  
{ SIq1X'7  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) (w+%=z"M  
 { I:#Ok+   
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分 S5N@\ x  
  SaveBmp(); 3bH~';<  
  return FALSE;  tPA:_  
 } p8=|5.  
 …… //其它处理及默认处理 %[w Tz$S"  
} 2FGx _ Y  
$uCiXDKCq  
XaW4C-D&  
  将屏幕图像保存到BMP文件中的任务是由函数SaveBmp()来完成的,具体实现参见代码部分。另外为了顺利实现屏幕抓图,程序中还实现了"托盘"功能,由于这一部分本书在实例中已经专门介绍过了,所以不再赘述,读者朋友可以参考相关实例。 tBseqS3<  
a/~29gW8E\  
  最后需要提醒读者朋友们注意的是,源程序的编译与使用时要先编译hook.dll并将其放在系统目录(win2000/NT是system32,98/ME是system),然后编译对话框程序运行即可。  ="\*h(  
W;q+,Io  
  二、编程步骤 CtM'L   
w NH9WG  
  1、 启动Visual C++,生成一个DLL项目和一个基于对话框的应用程序项目,并将两个项目分别命名为"Hook"和"Capture"; gN?0m4[$i  
B7 HQR{t  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; >uTPjR[  
[Tb\woU  
  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"+wsM^@  
exQ#<x*  
  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; &]< 3 ~6n  
==N` !+  
  5、 添加代码,编译运行程序。 [Ct=F|  
as r=m{C"  
三、程序代码 R2 lXTW*  
OV[`|<C '  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL > \3ah4"o  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) &~#iIk~%  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ DLi?'K3t  
#if _MSC_VER > 1000 XJSa]P^B1  
#pragma once R}r~p?(M  
#endif // _MSC_VER > 1000 /b#q*x-b  
#ifndef __AFXWIN_H__ zDDK  
#error include 'stdafx.h' before including this file for PCH R \5Vq$Q  
#endif "Sjr_! u  
#include "resource.h" // main symbols ! _{d)J  
class CHookApp : public CWinApp \jyjQ,v)  
{ =&Xdm(  
 public: 0|XKd24BN  
  CHookApp(); b`CWp;6Y  
  // Overrides ; 0ko@ \Lq  
  // ClassWizard generated virtual function overrides %/T7Z; d  
  //{{AFX_VIRTUAL(CHookApp) oG_C?(7>  
 public: QU T"z'  
  virtual BOOL InitInstance(); O*G1 QX  
  virtual int ExitInstance(); l~J*' m2  
  //}}AFX_VIRTUAL Hx %$ X  
  //{{AFX_MSG(CHookApp) ?TpUf  
  // NOTE - the ClassWizard will add and remove member functions here. /p)F>WR  
  // DO NOT EDIT what you see in these blocks of generated code ! Zu21L3  
  //}}AFX_MSG dl0FQNz8@B  
  DECLARE_MESSAGE_MAP() 0xCz'mJ  
}; q8xd*--#  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); hj!+HHYSk  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); b5pMq$UVL  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); ~Ky4+\6o>  
BOOL InitHotkey(); !][F  
BOOL UnInit(); )(m0cP{7  
#endif m`6VKp{YD  
Ei5wel6!  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. i#W*'   
#include "stdafx.h" 5HKW"=5Cf  
#include "hook.h" .Evy_o\^  
#include <windowsx.h> Izo!rC  
#ifdef _DEBUG %NajFjBI  
#define new DEBUG_NEW nt ,7u(  
#undef THIS_FILE *1^$.Q&  
static char THIS_FILE[] = __FILE__; -M4p\6)Ge  
#endif ``|AgIg  
#define MAX_KEY 100 6/tI8H3E  
#define CTRLBIT 0x04 SfB8!V|;  
#define ALTBIT 0x02 m"d/b~q  
#define SHIFTBIT 0x01 i ]o"_=C  
#pragma data_seg("shareddata") W7=V{}b+  
HHOOK hHook =NULL; 2Y OKM #N]  
UINT nHookCount =0; T_;]fPajjD  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey DlTR|(AL  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT w? LrJ37u  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey *:hy Y!x  
static int KeyCount =0; mfom=-q3k  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift Dl C@fZD  
#pragma data_seg() ".U^if F  
HINSTANCE hins; riCV&0"n  
void VerifyWindow(); WE6\dhJ<  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) }Ln@R~[  
//{{AFX_MSG_MAP(CHookApp) ~/-eyxLTm  
// NOTE - the ClassWizard will add and remove mapping macros here. -rSIBc:$8  
// DO NOT EDIT what you see in these blocks of generated code! #0"~G][#  
//}}AFX_MSG_MAP +(?>-3_z  
END_MESSAGE_MAP() U \oy8FZ  
kV&9`c+  
CHookApp::CHookApp() aeP[+I9  
{ 9&Ne+MY^%  
 // TODO: add construction code here, %Mn.e a  
 // Place all significant initialization in InitInstance 1n=_y o  
} sL^yB  
h<6UC%'ac  
CHookApp theApp; 2/7_;_#vJ%  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) TgfrI  
{ Ev9 >@~^  
 BOOL bProcessed=FALSE; $ uh z  
 if(HC_ACTION==nCode) izZ=d5+K  
 { 06 mlj6hV  
  if((lParam&0xc0000000)==0xc0000000){// Key up 4Ysb5m)u  
   switch(wParam) {i [y9  
   { OB-Q /?0  
    case VK_MENU: zsXpA0~3s  
     MaskBits&=~ALTBIT; ..W-76{  
     break; s9)8b$t]  
    case VK_CONTROL: r8/l P}(F  
     MaskBits&=~CTRLBIT; aM=D84@  
     break; FjFMR 63  
    case VK_SHIFT: Di5(9]o2  
     MaskBits&=~SHIFTBIT; LT@OWH  
     break; 1X1 N tS @  
    default: //judge the key and send message Pm{*.AW1  
     break; !>$4]FkV  
   } uJU*")\V  
   for(int index=0;index<MAX_KEY;index++){ |L6&Gf]#5  
    if(hCallWnd[index]==NULL) S:bC[}  
     continue; Uh6 '$0  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) ~I=Y{iM  
    { O(Jj|Z  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); "3CJUr:Q  
     bProcessed=TRUE; (bp9Pjw  
    } =8{WZCW5  
   } +A8j@d#:  
  } MGpt}|t-  
  else if((lParam&0xc000ffff)==1){ //Key down _BM4>r?\  
   switch(wParam) f3MRD4+-  
   { BJ}D%nm}  
    case VK_MENU: P9Q~r<7n  
     MaskBits|=ALTBIT; ]T:;Vo  
     break; f9u^R=Ff[  
    case VK_CONTROL: hT g<*  
     MaskBits|=CTRLBIT; `# P$ ]:  
     break; S>Yj@L  
    case VK_SHIFT: S$q =;"  
     MaskBits|=SHIFTBIT; 'tgKe!-@  
     break; R`8@@ }  
    default: //judge the key and send message Guw}=l--YR  
     break; )cJ#-M2  
   } }_'IE1bA  
   for(int index=0;index<MAX_KEY;index++) W_|0y4QOo  
   { 0% L l  
    if(hCallWnd[index]==NULL) fxcc<h4  
     continue; yay<GP?  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) YZf6|  
    { &[vw 0N-  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); (2ot5x}`j  
     bProcessed=TRUE; Sjj>#}U  
    } =8Jfgq9E  
   } M~e0lg8  
  } k%c{ETdE  
  if(!bProcessed){ dUrElXbXd  
   for(int index=0;index<MAX_KEY;index++){ ;|T!#@j  
    if(hCallWnd[index]==NULL) &)d$t'7p  
     continue; VosZJv=  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) f|7\DeY9U  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); #N(= 3Cj  
   } 9m2, qr|  
  } +n0r0:z0  
 } p{A}pnjf  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); '@|_OmcY  
} 1$/MrPT(b  
$@-P5WcRs  
BOOL InitHotkey() zET^T5>:  
{ B(g_Gm<  
 if(hHook!=NULL){ Q#I"_G&{  
  nHookCount++; C*=Xk/0  
  return TRUE; _9 .(a  
 } r|Z3$J{^"  
 else $``1PJoi  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); !LMN[3M_  
  if(hHook!=NULL) Dr&('RZ4  
   nHookCount++; 1@48BN8cm'  
  return (hHook!=NULL); \*hrW(   
} PX: '/{V  
BOOL UnInit() Ks^6.)  
{ v4,h&JLt  
 if(nHookCount>1){ ?lGG|9J\  
  nHookCount--; Pt:e!qX)  
  return TRUE; M-L2w"  
 } LsEXM-  
 BOOL unhooked = UnhookWindowsHookEx(hHook); H={DB  
 if(unhooked==TRUE){ \J..*,'  
  nHookCount=0; f ),TO  
  hHook=NULL; Ei}/iBG@  
 } |:[tNs*,O  
 return unhooked; +CH},@j  
} K;?,FlH  
c .3ZXqpI;  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) ,u }XW V  
{ oBQ#eW aY  
 BOOL bAdded=FALSE; p^<yj0Y  
 for(int index=0;index<MAX_KEY;index++){ ,[S+T.Cu  
  if(hCallWnd[index]==0){ y.5/?{GL  
   hCallWnd[index]=hWnd; }VS3L_ ;}/  
   HotKey[index]=cKey; oF9 -&  
   HotKeyMask[index]=cMask; Va,<3z%O<  
   bAdded=TRUE; lt^\  
   KeyCount++; LZJA4?C  
   break; N7'OPTKt&  
  } Ds #/  
 } k Iw`P[  
 return bAdded; )[H{yQ  
} Wt)Drv{@ {  
;AR{@Fu.  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask)  ~\,w {  
{ fbyQjvURnC  
 BOOL bRemoved=FALSE; KoE8 Mp  
 for(int index=0;index<MAX_KEY;index++){ T{V/+RM  
  if(hCallWnd[index]==hWnd){ Re:jVJg Bz  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ 6:GTD$Uz.  
    hCallWnd[index]=NULL; PWh^[Rd)  
    HotKey[index]=0; 1c3TN#|)W  
    HotKeyMask[index]=0; >_rha~   
    bRemoved=TRUE; 9I1tN  
    KeyCount--; 8h3=b[  
    break; P 71(  
   } IdYzgDH  
  } ] h-,o R?e  
 } ur :i)~wXn  
 return bRemoved; ?88[|;b3  
} .)}@J5 P)  
/V3=KY`_J  
void VerifyWindow() Q9I j\HbA"  
{ WLF0US'  
 for(int i=0;i<MAX_KEY;i++){ 8^Hn"v  
  if(hCallWnd!=NULL){ V fv@7@q  
   if(!IsWindow(hCallWnd)){ G+B~Ix-  
    hCallWnd=NULL; a#mNE*Dg  
    HotKey=0; F'g Vzf  
    HotKeyMask=0; ]\/tVn.'  
    KeyCount--; jV.g}F+1m  
   } 4}_O`Uxh  
  } Gl1jxxd  
 } ,Jcm+ Wb  
} "UEv&mQ  
9lB]~,z  
BOOL CHookApp::InitInstance() vN 2u34  
{ iXyO(w4D  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); <0yE 5Mrf  
 hins=AfxGetInstanceHandle(); iX0iRC6f  
 InitHotkey(); u6`=x$&  
 return CWinApp::InitInstance(); xs\!$*R  
}  K;LZ-  
$P1O>x>LIL  
int CHookApp::ExitInstance() N`)$[&NG]  
{ b-3*Nl_%  
 VerifyWindow(); 8G5Da|\  
 UnInit(); zBO(`=|  
 return CWinApp::ExitInstance(); [((;+B  
} wApMzZ(X2y  
*Zm^ ~Vo  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file )tCX y4  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) -n'F v@U  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ nW;g28  
#if _MSC_VER > 1000 aM7uBx\8 5  
#pragma once >A0k 8T  
#endif // _MSC_VER > 1000 "NgoaG~!YO  
sXd8rj:o  
class CCaptureDlg : public CDialog rr#K"SP  
{ Vd=yr'?  
 // Construction B||;'  
 public: .VTy[|o   
  BOOL bTray; K}6dg<  
  BOOL bRegistered; Cy*|&=>j  
  BOOL RegisterHotkey(); 5,)Q w  
  UCHAR cKey; J9K3s_SN  
  UCHAR cMask; `R"I;qV  
  void DeleteIcon(); #Rg|BfV-  
  void AddIcon(); p{PE@KO:  
  UINT nCount; -s9P 8W  
  void SaveBmp(); `/HUV&i"S  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor WM)-J^)BJ  
  // Dialog Data 9;?UvOI;  
  //{{AFX_DATA(CCaptureDlg) 54rkC/B>  
  enum { IDD = IDD_CAPTURE_DIALOG }; 97K[(KE  
  CComboBox m_Key; ljK rj  
  BOOL m_bControl; a>mm+L 8y  
  BOOL m_bAlt; $lhC{&tBV  
  BOOL m_bShift; 7LO%#No",  
  CString m_Path; C/(M"j M  
  CString m_Number; ]v#r4Ert  
  //}}AFX_DATA c1%H4j4/  
  // ClassWizard generated virtual function overrides CRbdAqofV  
  //{{AFX_VIRTUAL(CCaptureDlg) _ Ro!"YVX  
 public: l2;CQ7  
  virtual BOOL PreTranslateMessage(MSG* pMsg); E~LT b) !  
 protected: SZJ$w-<z  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support nenU)*o  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); Mwgu93?  
  //}}AFX_VIRTUAL lo'W1p  
  // Implementation q5>v'ZSo  
 protected: F@R1:M9*  
  HICON m_hIcon; ~tOAT;g}q  
  // Generated message map functions Q[+ac*F=Y  
  //{{AFX_MSG(CCaptureDlg) 31EyDU,W  
  virtual BOOL OnInitDialog(); RZ1 /#;  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); w`l{LHrR  
  afx_msg void OnPaint(); &K/FyY5  
  afx_msg HCURSOR OnQueryDragIcon(); \^#~@9  
  virtual void OnCancel(); _0 gKK2  
  afx_msg void OnAbout(); _gD pKEaY  
  afx_msg void OnBrowse(); &YDK (&>  
  afx_msg void OnChange(); JsO *1{6g  
 //}}AFX_MSG "bDs2E+W  
 DECLARE_MESSAGE_MAP() XJ2^MF2BU  
}; kh%{C] ".1  
#endif jYiv'6z  
9o>8o  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file Z'H5,)j0R  
#include "stdafx.h" ?8W( "W   
#include "Capture.h" g#]wLm#  
#include "CaptureDlg.h" @y31NH(  
#include <windowsx.h> ,RN:^5 p  
#pragma comment(lib,"hook.lib") "QvmqI>  
#ifdef _DEBUG QMEcQV>  
#define new DEBUG_NEW >AJSqgHQ,  
#undef THIS_FILE S~]mWxgZ  
static char THIS_FILE[] = __FILE__; WW~+?g5  
#endif ~Y.tz`2D  
#define IDM_SHELL WM_USER+1 =V"(AuCVE  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); t'm;:J1  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); Gn;@{x6  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; &CwFdx:Ff  
class CAboutDlg : public CDialog r=c<--_@  
{ mqq;H}  
 public: Qv-@Zt!8  
  CAboutDlg(); 97)/"i e  
  // Dialog Data :W@#) 1=  
  //{{AFX_DATA(CAboutDlg) Kt0(gQOr0  
  enum { IDD = IDD_ABOUTBOX }; ?'"X"@r5  
  //}}AFX_DATA U\rh[0  
  // ClassWizard generated virtual function overrides y,pZTlE  
  //{{AFX_VIRTUAL(CAboutDlg) N?X~w <  
 protected: |pa$*/!NT  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support h=_mNG>R)  
  //}}AFX_VIRTUAL @(C1_  
  // Implementation GElvz'S~  
 protected: UU8pz{/  
  //{{AFX_MSG(CAboutDlg) W5#611  
  //}}AFX_MSG I7^zU3]Ul  
  DECLARE_MESSAGE_MAP() pu,?<@0YK  
}; 0EJ(.8hwm  
5JhdV nT_  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) 67y Tvr@a  
{ US  
 //{{AFX_DATA_INIT(CAboutDlg) hQNe;R5  
 //}}AFX_DATA_INIT cwV]!=RtO  
} 5[n(7;+gw  
gl&5l1&  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) h~wi6^{&Y  
{ (LHp%LaZ\;  
 CDialog::DoDataExchange(pDX); e$Y[Z{T5  
 //{{AFX_DATA_MAP(CAboutDlg) GA`PY-Vs)  
 //}}AFX_DATA_MAP e *j.  
} ZtHm\VTS  
~zHg[X*  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) B^%1Rpcn  
 //{{AFX_MSG_MAP(CAboutDlg) -+t]15  
 // No message handlers *%vwM7  
 //}}AFX_MSG_MAP `>o?CIdp  
END_MESSAGE_MAP() {,OS-g  
}h 3K@R   
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) .vG,fuf8  
: CDialog(CCaptureDlg::IDD, pParent) 7Ol}EPf#  
{ H:H6b  
 //{{AFX_DATA_INIT(CCaptureDlg) OCy0#aPRS  
  m_bControl = FALSE; BnRN;bu  
  m_bAlt = FALSE; NzKUtwnIz  
  m_bShift = FALSE; Ej7 /X ~  
  m_Path = _T("c:\\"); +y 87~]]  
  m_Number = _T("0 picture captured."); Vb qto|X@  
  nCount=0; h $N0 D !  
  bRegistered=FALSE; 8QK5z;E2~  
  bTray=FALSE; >MJg ,  
 //}}AFX_DATA_INIT LW:o8ES33  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 [31p&FxM  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); 4d:{HLX,  
} s_.]4bl.8  
a?YCn!  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) 5<L_|d)0"  
{ 5PcJZi^.l  
 CDialog::DoDataExchange(pDX); m5G\}8|  
 //{{AFX_DATA_MAP(CCaptureDlg) 2 &Nb  
  DDX_Control(pDX, IDC_KEY, m_Key); $BmmNn#  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); -*2Mf Mh  
  DDX_Check(pDX, IDC_ALT, m_bAlt); &_5tqh  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); 1c+]gIe  
  DDX_Text(pDX, IDC_PATH, m_Path); {YUIMd!Y  
  DDX_Text(pDX, IDC_NUMBER, m_Number); wW?,;B'74  
 //}}AFX_DATA_MAP XBQ\_2>  
} #"fJa:IYG7  
d2s OYCKe  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) fIF<g@s  
//{{AFX_MSG_MAP(CCaptureDlg) r}yG0c,  
 ON_WM_SYSCOMMAND() %r)avI  
 ON_WM_PAINT() F_uY{bg  
 ON_WM_QUERYDRAGICON() 3?E8\^N\n  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) lt$zA%`odc  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) . |*f!w}5  
 ON_BN_CLICKED(ID_CHANGE, OnChange) H UoyLy  
//}}AFX_MSG_MAP !6&W,0<  
END_MESSAGE_MAP() `MP|Ovns:H  
fA48(0p  
BOOL CCaptureDlg::OnInitDialog() fri0XxF  
{ mW%?>Z1=>d  
 CDialog::OnInitDialog(); 9;%CHb&  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); *c[2C  
 ASSERT(IDM_ABOUTBOX < 0xF000); S]sk7  
 CMenu* pSysMenu = GetSystemMenu(FALSE); %7`f{|.  
 if (pSysMenu != NULL) !QmzrX}h  
 { ZtVAEIZ)  
  CString strAboutMenu; y$hp@m'@C  
  strAboutMenu.LoadString(IDS_ABOUTBOX); midsnG+jnf  
  if (!strAboutMenu.IsEmpty()) TO,rxf  
  { `IINq{Zk  
   pSysMenu->AppendMenu(MF_SEPARATOR); FI8Oz,  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); A$g+K,.l  
  } G1 o70  
 } ^7]"kg DA  
 SetIcon(m_hIcon, TRUE); // Set big icon 7t9c7HLuj/  
 SetIcon(m_hIcon, FALSE); // Set small icon gqib:q ;r  
 m_Key.SetCurSel(0); W\f9jfD  
 RegisterHotkey(); avp; *G }  
 CMenu* pMenu=GetSystemMenu(FALSE); dMx4ykrR  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); 4;`Bj:.  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); j\RpO'+}  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); Pag63njg?  
 return TRUE; // return TRUE unless you set the focus to a control a'\By?V]  
} ')S;[=v  
vhr+g 'tf  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) acd:r%y  
{ 1r r@  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) mmw^{MK!  
 { Q '(ihUq*k  
  CAboutDlg dlgAbout; +&KQ28r  
  dlgAbout.DoModal(); *s}|Hy  
 } o  A* G  
 else g=}v>[k E  
 { J` { 6l  
  CDialog::OnSysCommand(nID, lParam); [=*E+Oc  
 } Bqws!RM'&@  
} rg(lCL&:S  
Uh.Zi3X6}6  
void CCaptureDlg::OnPaint() !k$}Kj)I  
{ vtJV"h?e"3  
 if (IsIconic()) =R*Gk4<Y  
 { nD" ~?*Lt  
  CPaintDC dc(this); // device context for painting V@=V5bZLs  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); %,b X/!  
  // Center icon in client rectangle &Y@#g9G  
  int cxIcon = GetSystemMetrics(SM_CXICON); yj@tV2  
  int cyIcon = GetSystemMetrics(SM_CYICON); M4Z@O3OI E  
  CRect rect; !}3,B28  
  GetClientRect(&rect); P,gdnV ^  
  int x = (rect.Width() - cxIcon + 1) / 2; 151tXSzLT  
  int y = (rect.Height() - cyIcon + 1) / 2; "fQRk  
  // Draw the icon x2|6   
  dc.DrawIcon(x, y, m_hIcon); c.H?4j7ga  
 } PBks` |+  
 else RK9>dkW  
 { O}Ui`eWU  
  CDialog::OnPaint(); I.}1JJF*   
 } _baYn`tFw-  
} s_jBu  
]Gc3Ea;4  
HCURSOR CCaptureDlg::OnQueryDragIcon() g( 0;[#@  
{ P 2n2 Qt2  
 return (HCURSOR) m_hIcon; MrE<vw@he  
} Ni[4OR$-O  
bm&87  
void CCaptureDlg::OnCancel() A,~Hlw  
{ )Du -_Z  
 if(bTray) IKvBf'%-  
  DeleteIcon(); ^c9ThV.v  
  CDialog::OnCancel(); J."{<&  
} (U.**9b;  
Q F-)^`N  
void CCaptureDlg::OnAbout() )&W|QH=AI  
{  e/e0d<(1  
 CAboutDlg dlg; dhRJg"vrQ  
 dlg.DoModal(); 0rMqWP  
} FyD.>ot7M  
@%i>XAe#0  
void CCaptureDlg::OnBrowse() (0*v*kYdL+  
{ nR5bs;gk"  
 CString str; ]>:^d%n,}  
 BROWSEINFO bi; ;np_%?is  
 char name[MAX_PATH]; i8V0Ty4~N  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); `rWB`q|i<  
 bi.hwndOwner=GetSafeHwnd(); CKARg8o  
 bi.pszDisplayName=name; 6i@ub%qq  
 bi.lpszTitle="Select folder"; 4 9w=kzo  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; YaFcz$GE_  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); >?XbU}  
 if(idl==NULL) % mn />  
  return; rb_Z5T  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH));  :q2YBa  
 str.ReleaseBuffer(); 9n}A ^  
 m_Path=str; }(i(Ar-  
 if(str.GetAt(str.GetLength()-1)!='\\') Mps *}9  
  m_Path+="\\"; i|2$8G3  
 UpdateData(FALSE); 'ND36jHcRD  
} FuP}Kec  
#0MK(Ut/  
void CCaptureDlg::SaveBmp() t/:w1rw  
{ O4+F^+qN  
 CDC dc; R lg#z4m  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); j)D-BK&+  
 CBitmap bm; 4e%8D`/=M  
 int Width=GetSystemMetrics(SM_CXSCREEN); ^E@@YV  
 int Height=GetSystemMetrics(SM_CYSCREEN); '_Wt }{h  
 bm.CreateCompatibleBitmap(&dc,Width,Height); #MTj)P,  
 CDC tdc; , p0KLU\-  
 tdc.CreateCompatibleDC(&dc); EnscDtf(  
 CBitmap*pOld=tdc.SelectObject(&bm); <*@~n- R$  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); $^vP<  
 tdc.SelectObject(pOld); ;e;\q;GP  
 BITMAP btm; >_Uj?F:  
 bm.GetBitmap(&btm); Tx+ p8J|Yr  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; g5R,% 6  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); #4y,a_)  
 BITMAPINFOHEADER bih; A o3HX  
 bih.biBitCount=btm.bmBitsPixel; i>Iee^_(  
 bih.biClrImportant=0; 7Jx%JgF  
 bih.biClrUsed=0; )*[ ""&  
 bih.biCompression=0; \RE c8nsLy  
 bih.biHeight=btm.bmHeight; ^pcRW44K  
 bih.biPlanes=1; ?iln<% G  
 bih.biSize=sizeof(BITMAPINFOHEADER); @%B4;c  
 bih.biSizeImage=size; qyv"Wb6+  
 bih.biWidth=btm.bmWidth; 6+%-GgPf  
 bih.biXPelsPerMeter=0; oeN zHp_  
 bih.biYPelsPerMeter=0; #\b ;2>  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); agY5Dg7  
 static int filecount=0; Kfjryo9  
 CString name; ="lI i$>O  
 name.Format("pict%04d.bmp",filecount++); 8IWw jyRr  
 name=m_Path+name; *CUdGI&  
 BITMAPFILEHEADER bfh; vv h.@f  
 bfh.bfReserved1=bfh.bfReserved2=0; ;5M<j3_*  
 bfh.bfType=((WORD)('M'<< 8)|'B'); 2Guvze_bU  
 bfh.bfSize=54+size; <|JU(B  
 bfh.bfOffBits=54; A70(W{6a9@  
 CFile bf; _<u;4RO(s  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ >-<F)  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); Yq0# #__  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); X8b#[40:  
  bf.WriteHuge(lpData,size); {bTeAfbf]  
  bf.Close(); " dT>KQ  
  nCount++; !Zj#.6c9  
 } 5DSuUEvWcL  
 GlobalFreePtr(lpData); cj^bh  
 if(nCount==1) &|z|SY]DL  
  m_Number.Format("%d picture captured.",nCount); _?Ckq  
 else H XP;0B%4  
  m_Number.Format("%d pictures captured.",nCount); $nFAu}%C  
  UpdateData(FALSE); 6h@+?{F.  
} hNVMz`r  
=~",/I?  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) 6H6Law!)  
{ ^f0(aYWx  
 if(pMsg -> message == WM_KEYDOWN) 86{ZFtv  
 { ~>w:;M=sV8  
  if(pMsg -> wParam == VK_ESCAPE) BK*UR+,  
   return TRUE; O9;dd yx  
  if(pMsg -> wParam == VK_RETURN) qvN"1=nJ  
   return TRUE; ~y@& }  
 } Bt6xV<jD  
 return CDialog::PreTranslateMessage(pMsg); vrO%XvXW  
} ]Da4.s*mW  
+U=KXv  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) u7u~  
{ p|s2G~0<  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ LT& /0  
  SaveBmp(); JilKZQmk  
  return FALSE; R25-/6_V>  
} GDmv0V$6  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ ]gHLcr3  
 CMenu pop; w< mqe0  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); VwC4QK,d;  
 CMenu*pMenu=pop.GetSubMenu(0); fr]Hc+7  
 pMenu->SetDefaultItem(ID_EXITICON); bQpoXs0w;  
 CPoint pt; #8&#E?^d  
 GetCursorPos(&pt); Hi7G/2t@`  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); d1lH[r!Z  
 if(id==ID_EXITICON) lux9o$ %  
  DeleteIcon(); rxArTpS{.#  
 else if(id==ID_EXIT) X_!$Pk7ma  
  OnCancel(); _;V YFs  
 return FALSE; .Map   
} K_FBy  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); a^x  0 l  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) ja:\W\xhJ  
 AddIcon(); ME,duY/>Q  
 return res; 8ur_/h7  
} r.Lx%LZ\^  
sHF%=Vu  
void CCaptureDlg::AddIcon() '1lx{U zD  
{ G-s a L*  
 NOTIFYICONDATA data; cY^Y!.,  
 data.cbSize=sizeof(NOTIFYICONDATA); %WmZ ]@M  
 CString tip; s1v{~xP  
 tip.LoadString(IDS_ICONTIP); %27G2^1  
 data.hIcon=GetIcon(0); H'']J9O  
 data.hWnd=GetSafeHwnd(); Mi;Tn;3er  
 strcpy(data.szTip,tip); :g/{(#E@Z  
 data.uCallbackMessage=IDM_SHELL; {YfYIt=.  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; DSTx#*  
 data.uID=98; !Am =v=>  
 Shell_NotifyIcon(NIM_ADD,&data); nT)~w s  
 ShowWindow(SW_HIDE); BHIM'24bp  
 bTray=TRUE; 8@Q"YA 3d+  
} 7V |"~%  
o` 2 5  
void CCaptureDlg::DeleteIcon() r"6lLc  
{ (s.o  
 NOTIFYICONDATA data; br10ptEx  
 data.cbSize=sizeof(NOTIFYICONDATA); pM,#wYL  
 data.hWnd=GetSafeHwnd(); zcZ^s v>  
 data.uID=98; ayN*fiV]  
 Shell_NotifyIcon(NIM_DELETE,&data); 2pw>B%1WP)  
 ShowWindow(SW_SHOW); OY$7`8M[  
 SetForegroundWindow(); NCp%sGBmG  
 ShowWindow(SW_SHOWNORMAL); 40rZ~!}  
 bTray=FALSE; qP@L(_=g  
} E:%>0FE  
YALyZ.d  
void CCaptureDlg::OnChange()  $.=5e3  
{ ;%M2x5  
 RegisterHotkey(); EwC5[bRjUp  
} N" 8*FiZ|  
% 1OC#&  
BOOL CCaptureDlg::RegisterHotkey() .`b4h"g:  
{ 5Gc_LI&v7  
 UpdateData(); 8a_ UxB  
 UCHAR mask=0; x4/T?4k  
 UCHAR key=0; }3LBbG0Bw  
 if(m_bControl) Fa6H(L3  
  mask|=4; @263)`9G  
 if(m_bAlt) !^n1  
  mask|=2; eUi> Mp  
 if(m_bShift) PV5-^Y"v  
  mask|=1; &II JKn|_  
  key=Key_Table[m_Key.GetCurSel()]; D:+)uX}MOf  
 if(bRegistered){ >B@i E  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); R994R@gz  
  bRegistered=FALSE; MYKs??]Y1  
 } "h^A]t;qe  
 cMask=mask; ,ZsYXW  
 cKey=key; 7g {g}  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); Cij$GYkv  
 return bRegistered; >aNbp  
} B:B0p+$I  
nD^{Q[E6=  
  四、小结 kq-mr  
g| _HcaW  
  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