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
  • 7122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: `R:<(:  
  s\7|b:y&  
  一、实现方法 TlBLG.-^  
/cI]Z^&  
  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: Pv1psKu  
v Z]gb$  
#pragma data_seg("shareddata") {B\.8)&8  
HHOOK hHook =NULL; //钩子句柄 &-cI|  
UINT nHookCount =0; //挂接的程序数目 MIR17%G  
static UCHAR HotKey[MAX_KEY] = {0}; //热键虚拟键码 "g=ux^+X\  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //组合掩码, control=4,alt=2,shift=1 n1sH`C[c  
static HWND hCallWnd[MAX_KEY] = {0}; //window handle associated with hotkey `=-}S+  
static int KeyCount =0; $S,Uoh  
static UCHAR MaskBits =0; //00000 Ctrl=4 & Alt=2 & Shift=1 6_XX[.%  
#pragma data_seg() T7W+K7kbI  
*ac#wEd  
  关于共享段,有几点重要的说明:一是必须在链接选项里指定该段为共享:一种方法是在project->settings->link->object/library中加上/section:shareddata,rws;第二种方法是在def文件的sections里加上一句shareddata read write shared;第三种指定共享段的方法在程序里加上一句#pragma comment(linker,"section:shareddata,rws")。二是所有的变量必须初始化,否则链接程序会把它放到普通数据段。三是如果不初始化变量,需要在段外用"__declspec(allocate("shareddata")) 变量类型 变量名"的方式定义。 ppV\FQ{K  
Ce_Z &?  
  DLL中的两个输出函数分别用来添加/删除热键,函数代码如下: FswFY7 8  
cz T@txF  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR dk(-yv'  
cKey,UCHAR cMask) }U^9(  
{ [MiD%FfcNH  
 BOOL bAdded=FALSE; (n`\b47  
 for(int index=0;index<MAX_KEY;index++){ qtgK}*9ptv  
  if(hCallWnd[index]==0){ %mcuYR'D}  
   hCallWnd[index]=hWnd; G^2"\4R]p  
   HotKey[index]=cKey; zG @!(  
   HotKeyMask[index]=cMask; G&uj}rj  
   bAdded=TRUE; PTePSj1N  
   KeyCount++; P@5^`b|  
   break; DV%tby  
  } zkd#vAY(A  
 } _K;rM7  
 return bAdded; O-y"]Wrv  
} ?QuFRl,ZJ  
//删除热键 D!Gm9Pa}  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) E'r* g{,  
{ W6_3f-4g  
 BOOL bRemoved=FALSE; omRd'\ RO  
 for(int index=0;index<MAX_KEY;index++){ Q ?Nzt;)!.  
  if(hCallWnd[index]==hWnd){ (c} 0Sg  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ S [u <vHy  
    hCallWnd[index]=NULL; )>[(HxvfJU  
    HotKey[index]=0; d>AVUf<o~  
    HotKeyMask[index]=0; 8\a)}k~4  
    bRemoved=TRUE; -8pHjry'q  
    KeyCount--; v5 9>  
    break; =  Oq;  
   } \2+xMv)8  
  } 9J%>2AA  
 } uq%RZF z(v  
 return bRemoved; V)a6H^l  
} 7=<PVJ*/  
NA3yd^sr  
\`XJz{Lm]  
  DLL中的钩子函数如下: =riP~%_ML)  
aIfog+Lp  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) 3oKqj>  
{ -B4v1{An  
 BOOL bProcessed=FALSE; n!N;WL3k  
 if(HC_ACTION==nCode) NeK:[Q@je  
 { i#-Jl7V[a  
  if((lParam&0xc0000000)==0xc0000000){// 有键松开 #dl8+  
   switch(wParam) ow$#kQ&R O  
   {  @O3w4Zs  
    case VK_MENU: w_{z"VeD  
     MaskBits&=~ALTBIT; 7}lZa~/  
     break; NMj `wQ`M+  
    case VK_CONTROL: HOUyB's'  
     MaskBits&=~CTRLBIT; /f6]XP\'`+  
     break; >WD^)W fa  
    case VK_SHIFT: &FZe LIt  
     MaskBits&=~SHIFTBIT; 2fLd/x~  
     break; Ke/P [fo  
    default: //judge the key and send message i5wA=K_  
     break; tL).f:?  
   } '|q :h  
   for(int index=0;index<MAX_KEY;index++){ Sm1bDa\!=  
    if(hCallWnd[index]==NULL) Dr2h-  
     continue;  JA)gM  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) [n}c}%  
    { lZua"Ju  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); c]"B)I1L  
     bProcessed=TRUE; xUw\Y(!  
    } *K98z ?  
   } tEEhSG)s%  
  } KW;xlJz(j  
  else if((lParam&0xc000ffff)==1){ //有键按下 &t8_J3?Z  
   switch(wParam) OcH- `A  
   { UMX+h])#N  
    case VK_MENU: \LYQZ*F  
     MaskBits|=ALTBIT; cwD0 ~B  
     break; P0Jd6"sS"  
    case VK_CONTROL: $x)'_o}e  
     MaskBits|=CTRLBIT; .ClCP?HG  
     break; 6X jUb  
    case VK_SHIFT: -j$l@2g  
     MaskBits|=SHIFTBIT; %F4Q|  
     break; {xykf7zp  
    default: //judge the key and send message 'w!gQ#De  
     break; yd%\3}-  
   } /~^I]D  
   for(int index=0;index<MAX_KEY;index++){ ?I0 i%nH  
    if(hCallWnd[index]==NULL) =ddx/zN  
     continue; p}.b#{HJ  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) n=SZ8Rj7  
    { czb%%:EJs|  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); zo5.}mr+  
     bProcessed=TRUE; F*w|/-e  
    } .J@[v  
   } nn   
  } x2B"%3th0  
  if(!bProcessed){ //一般按键事件,为监视键盘的程序留出余地 X@Bpjg  
   for(int index=0;index<MAX_KEY;index++){ RP X`2zr  
    if(hCallWnd[index]==NULL) o"FX+ 17  
     continue; v\k,,sI  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) }ri*e2y)  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); 2at?9{b  
     //lParam的意义可看MSDN中WM_KEYDOWN部分 /j)VES  
   } g@y" B6X  
  } $`Xx5 Ts7  
 } '-S&i{H  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); LWL>hd  
} bc4x"]!  
__fR #D  
  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: Y) h%<J  
8 (KfX%  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); A{J1 n  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); *0hiPj:  
)f!dG(\&#  
  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: '=~y'nPG7  
Z+dR(9otH3  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) KVcZ@0[S  
{ CU;nrd"  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN) z-gwNE{  
 { &0eB@8{N  
  //lParam表示是按下还是松开,如果有多个热键,由wParam来区分  ke#;1  
  SaveBmp(); 4@V] zfu^Q  
  return FALSE; L@_">' pR  
 } &+j^{a  
 …… //其它处理及默认处理 (rG1_lUDu  
} XH *tChf<  
D+)=bPMe  
0;h1LI)  
  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。 3uw7 J5x  
/h M>dkwu  
  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。 [4hO3):F  
-h@0 1  
  二、编程步骤 U>+~.|'V9  
$i@EfujY  
  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"; D,n}Qf!GYk  
Xe SbA  
  2、 在"Hook"项目中导出AddHotkey()、DeleteHotkey()函数; # VV.[ N  
Doh|G:P]#  
  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; e87- B1`  
05KoxFO?  
  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; T"H )g  
JZ% F  
  5、 添加代码,编译运行程序。 $vLV< y07  
,/:a77  
三、程序代码 &7T H V  
fBgKX ?Y  
///////////////////////////////////// Hook.h : main header file for the HOOK DLL CdDd+h8  
#if !defined(AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_) rH9}nL  
#define AFX_HOOK_H__AEBFF705_C93A_11D5_B7D6_0080C82BE86B__INCLUDED_ <s >/< kW:  
#if _MSC_VER > 1000 [/Z'OV"tU  
#pragma once `,Nn4  
#endif // _MSC_VER > 1000 LZ)m](+M  
#ifndef __AFXWIN_H__ oe |e+  
#error include 'stdafx.h' before including this file for PCH iHn!KV  
#endif i"]8Zw_D  
#include "resource.h" // main symbols K~8tN ,~&  
class CHookApp : public CWinApp >NRz*h#  
{ @6co\.bv  
 public: ]kkBgjQbS  
  CHookApp(); 8KtgSash  
  // Overrides z>33O5U  
  // ClassWizard generated virtual function overrides +w.Kv ;  
  //{{AFX_VIRTUAL(CHookApp) _qeuVi=A  
 public: ij(4)=  
  virtual BOOL InitInstance(); HQ3`:l  
  virtual int ExitInstance(); @7s,| \  
  //}}AFX_VIRTUAL &U~r}=  
  //{{AFX_MSG(CHookApp) a9Fm Y`  
  // NOTE - the ClassWizard will add and remove member functions here. iEviH>b5  
  // DO NOT EDIT what you see in these blocks of generated code ! jN%p5nZ^EK  
  //}}AFX_MSG 7vaN&%;E%  
  DECLARE_MESSAGE_MAP() NceB'YG|  
}; t/*K#]26  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam, LPARAM lParam); 7+a%ehwU  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); F>QT|  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); `f+8WPJPZ  
BOOL InitHotkey(); d BMe`hM)  
BOOL UnInit(); *fl{Y(_OO  
#endif 6#)Jl  
T_x+sv=|X!  
//////////////////////////////////////// Hook.cpp : Defines the initialization routines for the DLL. WYC1rfd=  
#include "stdafx.h" As+;qNO  
#include "hook.h" N 2"3~  #  
#include <windowsx.h> W/r mm*  
#ifdef _DEBUG {?/8jCVd  
#define new DEBUG_NEW `GQiB]Z  
#undef THIS_FILE ,![Du::1  
static char THIS_FILE[] = __FILE__; ZJ9Jf2 c  
#endif P$3=i`X!nw  
#define MAX_KEY 100 VL7S7pb_  
#define CTRLBIT 0x04  C5+`<  
#define ALTBIT 0x02 So=nB} b[?  
#define SHIFTBIT 0x01  oKYhE  
#pragma data_seg("shareddata") aw/7Z`   
HHOOK hHook =NULL; @mx$sNDkL  
UINT nHookCount =0; \$'m ^tVU  
static UCHAR HotKey[MAX_KEY] = {0}; //hotkey 7y)=#ZG'R  
static UCHAR HotKeyMask[MAX_KEY] = {0}; //flag for hotkey, value is VK_CONTRL or VK_NEMU or VK_SHIFT *1W, M zg  
static HWND hCallWnd[MAX_KEY] = {0}; //window associated with hotkey tP`G]BCbt  
static int KeyCount =0; QM ZUt  
static UCHAR MaskBits =0; //00000 Ctrl Alt Shift V[Rrst0yo  
#pragma data_seg() +lW}ixt  
HINSTANCE hins; adI!W-/R:  
void VerifyWindow(); $% Ci8p  
BEGIN_MESSAGE_MAP(CHookApp, CWinApp) qo6LC>Qg  
//{{AFX_MSG_MAP(CHookApp) >&;>PZBPCO  
// NOTE - the ClassWizard will add and remove mapping macros here. l#b|@4:I  
// DO NOT EDIT what you see in these blocks of generated code! +`*qlP;  
//}}AFX_MSG_MAP 7w Q+giu  
END_MESSAGE_MAP() `pi-zE)  
t0bhXFaiE  
CHookApp::CHookApp() abo>_"9-  
{ ~`2&'8  
 // TODO: add construction code here, u`Z0{d  
 // Place all significant initialization in InitInstance zr.+'  
} .%?- As  
Ug7`ez4vw  
CHookApp theApp; `z}vONXpAX  
LRESULT CALLBACK KeyboardProc(int nCode,WPARAM wParam,LPARAM lParam) * -KJh_  
{ ypD<2z^  
 BOOL bProcessed=FALSE; z!s. 9  
 if(HC_ACTION==nCode) +9zJlL^A%  
 { VW9>xVd4  
  if((lParam&0xc0000000)==0xc0000000){// Key up 9q1HSJ1)  
   switch(wParam) 7}ws |4Y  
   { kS+r"e .TM  
    case VK_MENU: ({%oi h  
     MaskBits&=~ALTBIT; Fm<jg}>MAd  
     break; IvTzPPP  
    case VK_CONTROL: Vvm=MBgN  
     MaskBits&=~CTRLBIT; QqiJun_m  
     break; VYamskK[G:  
    case VK_SHIFT: !%c{+]g  
     MaskBits&=~SHIFTBIT; K`QOU-M@}  
     break; RpO@pd m  
    default: //judge the key and send message 7R9nMGJ@  
     break; 5: daa  
   } JF~1' "_f:  
   for(int index=0;index<MAX_KEY;index++){ c62dorDqy  
    if(hCallWnd[index]==NULL) d>%gW*  
     continue; oX'0o 'c  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) +0XL5( '2  
    { =db'#m{$  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYUP); I@0z/4H``  
     bProcessed=TRUE; zoZ<)x=;  
    } ic*->-!  
   } 8 !4~T,9G  
  } iq"ob8.  
  else if((lParam&0xc000ffff)==1){ //Key down PiMKu|,3  
   switch(wParam) /&PKCtm&~  
   { yoBgr7gS  
    case VK_MENU:  0xJ7M.  
     MaskBits|=ALTBIT; /?KtXV>]  
     break; "]VDY)  
    case VK_CONTROL: gi6g"~%@q1  
     MaskBits|=CTRLBIT; Deg!<[Nw  
     break; aUH\Ee^M:R  
    case VK_SHIFT: YD&|1h  
     MaskBits|=SHIFTBIT; F9(._ow[  
     break; GX4QaT%  
    default: //judge the key and send message Z_H?WGO  
     break; @#RuSc  
   } Rn`ld@=p[  
   for(int index=0;index<MAX_KEY;index++) 'lJEHz\  
   { ?X\3&Ujy$  
    if(hCallWnd[index]==NULL) `|$'g^eCL  
     continue; {5^K Xj$B  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==wParam)&&(HotKeyMask[index]==MaskBits)) \6{krn|  
    { qysTjGwa]  
     SendMessage(hCallWnd[index],WM_HOTKEY,wParam,WM_KEYDOWN); iI5+P`sE&J  
     bProcessed=TRUE; s\[LpLt  
    } KZ=u54  
   } &V'519vmoZ  
  } CuH2E>wz  
  if(!bProcessed){ !fY7"E{%%  
   for(int index=0;index<MAX_KEY;index++){ ypx: )e"/  
    if(hCallWnd[index]==NULL) HTmI1  
     continue; ^Ye\u1n4  
    if(IsWindow(hCallWnd[index])&&(HotKey[index]==0)&&(HotKeyMask[index]==0)) GCDwWCxh  
     SendMessage(hCallWnd[index],WM_HOTKEY,WM_HOTKEY,lParam); Sw~(uH_l  
   } z{9=1XY  
  } J/2j;,8D  
 } {esJ=FV\  
 return CallNextHookEx( hHook, nCode, wParam, lParam ); U{6oLqwq3Y  
} `@[l\.Vt:  
]r4bRK[1  
BOOL InitHotkey() qO-9 x0v#  
{ X) V7bVW  
 if(hHook!=NULL){ [4sEVu}  
  nHookCount++; y$X(S\W  
  return TRUE; (n,u|}8Y  
 } 4({( i  
 else C{ EAmv'  
  hHook=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0); ,57$N&w  
  if(hHook!=NULL) f-Jbs`(+  
   nHookCount++; ,7W:fwdR  
  return (hHook!=NULL); <$%X<sDkq  
} ! QM.P t7c  
BOOL UnInit() WJ |:kuF  
{ rcV-_+KE(B  
 if(nHookCount>1){ ^$v3eKA  
  nHookCount--; S}(8f!9<  
  return TRUE; Z$ p0&~   
 } V A<5uk04K  
 BOOL unhooked = UnhookWindowsHookEx(hHook); + WVIZZ8  
 if(unhooked==TRUE){ F]UQuOR)  
  nHookCount=0; F.tfgW(A@  
  hHook=NULL; -(i(02PX  
 } ]mQw,S)/"  
 return unhooked; G O{ . 9_2  
} )=J5\3O*x  
Z\~G U*Y.e  
BOOL __declspec(dllexport) __stdcall AddHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) G?AG:%H%  
{ {o0qUX>[  
 BOOL bAdded=FALSE; !M7<BD};  
 for(int index=0;index<MAX_KEY;index++){ O:'?n8rWL  
  if(hCallWnd[index]==0){ *)<B0SjT  
   hCallWnd[index]=hWnd; l.`u5D  
   HotKey[index]=cKey; ?-MP_9!JK  
   HotKeyMask[index]=cMask; ?^i1_v7 Bi  
   bAdded=TRUE; hoM|P8 }rh  
   KeyCount++; =^&%9X  
   break; n(1')?"mA  
  } iDoDwq!l_  
 } jCioE  
 return bAdded;  J@_ctGv  
} IvHh4DU3Z  
<q (z>*-e  
BOOL __declspec(dllexport) __stdcall DeleteHotkey(HWND hWnd,UCHAR cKey,UCHAR cMask) /ASaB  
{ )@gZ;`n  
 BOOL bRemoved=FALSE; YO+{,$  
 for(int index=0;index<MAX_KEY;index++){ tz^/J=)"  
  if(hCallWnd[index]==hWnd){ 7y^%7U \  
   if(HotKey[index]==cKey&&HotKeyMask[index]==cMask){ 2f>PO +4S{  
    hCallWnd[index]=NULL; :~F:/5  
    HotKey[index]=0; ^/U27B  
    HotKeyMask[index]=0; @{hd{>K*  
    bRemoved=TRUE; o:S0*  
    KeyCount--; \f:z+F!6R  
    break; JL=U,Mr6  
   } r H8@69,B  
  } 0'5/K ,  
 } Jzkq)]M  
 return bRemoved; O`G/=/GZ  
} "_|oWn  
\1"'E@+  
void VerifyWindow() g.py+ ZFJ  
{ 1Xu?(2;NF  
 for(int i=0;i<MAX_KEY;i++){ Fd]\txOXj  
  if(hCallWnd!=NULL){ uhyj5u)  
   if(!IsWindow(hCallWnd)){ \u,}vpp z  
    hCallWnd=NULL; dU)]:>Uz  
    HotKey=0; Byl^?5  
    HotKeyMask=0; ldha|s.*  
    KeyCount--; s m,VYYs  
   } aNcd` $0  
  } -l~Z0U>^  
 } , DdB^Ig<r  
} x8Loyt_C  
qgIb/6;xQ  
BOOL CHookApp::InitInstance() YHNR 3  
{ ho8`sh>N  
 AFX_MANAGE_STATE(AfxGetStaticModuleState()); 1 `^Rdi0  
 hins=AfxGetInstanceHandle(); PZxAH9 S?  
 InitHotkey(); o[oM8o<  
 return CWinApp::InitInstance(); %^sTU4D5  
} [(X y.L7x  
,}oM-B  
int CHookApp::ExitInstance() -9N@$+T  
{ =_$Qtq+h  
 VerifyWindow(); -;f*VM.a  
 UnInit(); P-F)%T[  
 return CWinApp::ExitInstance(); |4$M]Mf0  
} &'cL%.  
X%z }VA  
////////////////////////////////////////////////////////////////////// CaptureDlg.h : header file Grs]d-xI  
#if !defined(AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_) Z^ }mp@j>  
#define AFX_CAPTUREDLG_H__97B51708_C928_11D5_B7D6_0080C82BE86B__INCLUDED_ QaUm1 i#  
#if _MSC_VER > 1000 zp\8_U @  
#pragma once ^ ,m< 9  
#endif // _MSC_VER > 1000 afjtn_IB  
zvABU+{jD  
class CCaptureDlg : public CDialog *6HTV0jv  
{ l/;X?g5+  
 // Construction mF` B#  
 public: RMMd#/A@}  
  BOOL bTray; <: &*  
  BOOL bRegistered; r0p w_j  
  BOOL RegisterHotkey(); 6'\6OsH  
  UCHAR cKey; OL4z%mDZi  
  UCHAR cMask; *s@Qtgu  
  void DeleteIcon(); vJAZ%aW  
  void AddIcon(); !9 fz(9  
  UINT nCount; :W b j\  
  void SaveBmp(); Ol4+_n8xj  
  CCaptureDlg(CWnd* pParent = NULL); // standard constructor  >S$Z  
  // Dialog Data ss;R8:5  
  //{{AFX_DATA(CCaptureDlg) 8~5cJPi6  
  enum { IDD = IDD_CAPTURE_DIALOG }; v<Bynd-  
  CComboBox m_Key; nUkaz*4qU  
  BOOL m_bControl; f~ }H  
  BOOL m_bAlt; !i=nSqW  
  BOOL m_bShift; lu Q~YjH  
  CString m_Path; Mq';S^  
  CString m_Number; cuOvN"nuNj  
  //}}AFX_DATA %Uz(Vd#K  
  // ClassWizard generated virtual function overrides bn |zl!Pq  
  //{{AFX_VIRTUAL(CCaptureDlg) oK 6(HF'&  
 public: f/CuE%7BR  
  virtual BOOL PreTranslateMessage(MSG* pMsg); 4CGPO c  
 protected: o|jIM9/  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support 2<M= L1\  
  virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam); Df3rV'/~  
  //}}AFX_VIRTUAL 6uKTGc4  
  // Implementation &89 oO@5  
 protected: M'_9A  
  HICON m_hIcon; Tw +  
  // Generated message map functions q^6+!&"  
  //{{AFX_MSG(CCaptureDlg) B]tIi^  
  virtual BOOL OnInitDialog(); 6e7{Iy  
  afx_msg void OnSysCommand(UINT nID, LPARAM lParam); )7_"wD` z  
  afx_msg void OnPaint(); GR\5WypoJ  
  afx_msg HCURSOR OnQueryDragIcon(); DY[$"8Kxcp  
  virtual void OnCancel(); YM5fyv?  
  afx_msg void OnAbout(); y"Nsh>h  
  afx_msg void OnBrowse(); Bn>8&w/P  
  afx_msg void OnChange(); `a9L%z  
 //}}AFX_MSG ZE%YXG  
 DECLARE_MESSAGE_MAP() =]k {"?j  
}; 7RZh<A>m  
#endif 0OGCilOb*  
~a xjjv  
////////////////////////////////////////////////////////////// CaptureDlg.cpp : implementation file CKA;.sh  
#include "stdafx.h" T?4G'84nN  
#include "Capture.h" 8i?l02  
#include "CaptureDlg.h" y\&>Z yOY  
#include <windowsx.h> ?McQr1  
#pragma comment(lib,"hook.lib") PTj&3`v  
#ifdef _DEBUG 2)j0Ai%  
#define new DEBUG_NEW s3W@WH^.  
#undef THIS_FILE ak:c rrkx  
static char THIS_FILE[] = __FILE__; dDnf^7q/  
#endif 2B,] -Mu)  
#define IDM_SHELL WM_USER+1 dx ;k`r$w  
BOOL __declspec(dllexport)__stdcall AddHotkey(HWND,UCHAR key,UCHAR mask); *cyeO*  
BOOL __declspec(dllexport)__stdcall DeleteHotkey(HWND,UCHAR key,UCHAR mask); a ^%"7Ri  
UCHAR Key_Table[]={0x78,0x79,0x7a,0x7b,0x6a,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; @)K%2Y`  
class CAboutDlg : public CDialog u[{tb  
{ LdB($4,  
 public: 3"rzb]=R  
  CAboutDlg(); 1h.)#g?{  
  // Dialog Data Y"KE7>Jf  
  //{{AFX_DATA(CAboutDlg) umdG(osR  
  enum { IDD = IDD_ABOUTBOX }; T~b>B`_  
  //}}AFX_DATA 29reG,>  
  // ClassWizard generated virtual function overrides Q[#vTB$f  
  //{{AFX_VIRTUAL(CAboutDlg) 7w3CXY  
 protected: s@fTj$h  
  virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support Wa?; ^T  
  //}}AFX_VIRTUAL \Y{k7^G}A  
  // Implementation {W##^L~  
 protected: X6^},C'E.:  
  //{{AFX_MSG(CAboutDlg) `%j~|i)4  
  //}}AFX_MSG !~h}8'a?  
  DECLARE_MESSAGE_MAP() /<rt1&0  
}; ]^6c8sgnR  
;U_QvN|  
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) +S=Rn,  
{ vVE7fq3  
 //{{AFX_DATA_INIT(CAboutDlg) Kt(-@\)!  
 //}}AFX_DATA_INIT t-LG }nv  
} u a\,->  
"]-Xmdk09  
void CAboutDlg::DoDataExchange(CDataExchange* pDX) "]\+?  
{ 77Bgl4P  
 CDialog::DoDataExchange(pDX); Dr6A ,3B  
 //{{AFX_DATA_MAP(CAboutDlg) E_zIg+(+  
 //}}AFX_DATA_MAP 5^j45'%I  
} xzx$TUL  
hI(SOsKs  
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) M'!U<Y -  
 //{{AFX_MSG_MAP(CAboutDlg) [b$4Shx  
 // No message handlers <r3J0)r}  
 //}}AFX_MSG_MAP ek N' k  
END_MESSAGE_MAP() |`jjHuQ;  
Zy09L}59P  
CCaptureDlg::CCaptureDlg(CWnd* pParent /*=NULL*/) r/*=%~*  
: CDialog(CCaptureDlg::IDD, pParent) oP4GEr  
{ *& m#qEv  
 //{{AFX_DATA_INIT(CCaptureDlg) t3+Py7qv  
  m_bControl = FALSE; SI8%M=P>  
  m_bAlt = FALSE; gsn)Wv$h  
  m_bShift = FALSE; WAn'kA  
  m_Path = _T("c:\\"); 9+keX{/c  
  m_Number = _T("0 picture captured."); v 36%Pj`  
  nCount=0; |^9BA-nA  
  bRegistered=FALSE; yZ!T8"mz{  
  bTray=FALSE; TFuR@KaBR  
 //}}AFX_DATA_INIT b?eu jxqg  
 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 _ A 0w[n  
 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); j;Z?WXWD h  
} bz | D-.  
[g2;N,V#  
void CCaptureDlg::DoDataExchange(CDataExchange* pDX) `ImE% r!  
{ 'fL"txW  
 CDialog::DoDataExchange(pDX); Dnc<sd;  
 //{{AFX_DATA_MAP(CCaptureDlg) xGI, Lk+  
  DDX_Control(pDX, IDC_KEY, m_Key); ?@n/v F  
  DDX_Check(pDX, IDC_CONTROL, m_bControl); 6_4D9 W  
  DDX_Check(pDX, IDC_ALT, m_bAlt); K x~|jq  
  DDX_Check(pDX, IDC_SHIFT, m_bShift); A7c/N=Cp^  
  DDX_Text(pDX, IDC_PATH, m_Path); pNRk.m]  
  DDX_Text(pDX, IDC_NUMBER, m_Number); "gD-8C3  
 //}}AFX_DATA_MAP %r+vSGt;5  
} |$7vI&m  
CX m+)a-L  
BEGIN_MESSAGE_MAP(CCaptureDlg, CDialog) m5Tr-w$QY  
//{{AFX_MSG_MAP(CCaptureDlg) "5A&_E }3  
 ON_WM_SYSCOMMAND() U w4>v:  
 ON_WM_PAINT() qn,O40/]  
 ON_WM_QUERYDRAGICON() f$'2}'.!$  
 ON_BN_CLICKED(ID_ABOUT, OnAbout) S'HnBn /  
 ON_BN_CLICKED(IDC_BROWSE, OnBrowse) ko^\ HSXl  
 ON_BN_CLICKED(ID_CHANGE, OnChange) 46k?b|Q  
//}}AFX_MSG_MAP !*`-iQo&  
END_MESSAGE_MAP() aC< KN:TN6  
i>_u_)-  
BOOL CCaptureDlg::OnInitDialog() Vn~UB#]'3  
{ |_ G )qp;  
 CDialog::OnInitDialog(); nQ GQWg`  
 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); FV,4pi  
 ASSERT(IDM_ABOUTBOX < 0xF000); ,y%3mR_~  
 CMenu* pSysMenu = GetSystemMenu(FALSE); #);[mW{F  
 if (pSysMenu != NULL) 1[ ]&(Pa  
 { 0D8K=h&e  
  CString strAboutMenu; v<fnB  
  strAboutMenu.LoadString(IDS_ABOUTBOX); [NFNzwUB  
  if (!strAboutMenu.IsEmpty()) &)oOeRwi].  
  { aAy'\T$x.  
   pSysMenu->AppendMenu(MF_SEPARATOR); |T{C,"9y  
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); #Eb5:;  
  } f>ZyI{  
 } ^`<w&I@  
 SetIcon(m_hIcon, TRUE); // Set big icon q%5eVG  
 SetIcon(m_hIcon, FALSE); // Set small icon q:<{% U$  
 m_Key.SetCurSel(0); N D<HXO  
 RegisterHotkey(); BI j=!!  
 CMenu* pMenu=GetSystemMenu(FALSE); B:Z_9,gj-N  
 pMenu->DeleteMenu(SC_MAXIMIZE,MF_BYCOMMAND); iX\W;V  
 pMenu->DeleteMenu(SC_SIZE,MF_BYCOMMAND); C4}*) a  
 pMenu->DeleteMenu(SC_RESTORE,MF_BYCOMMAND); YSaJeU>@  
 return TRUE; // return TRUE unless you set the focus to a control D/=5tOy  
} mR;qMX)0h  
@zgdq  
void CCaptureDlg::OnSysCommand(UINT nID, LPARAM lParam) SwU\ q]^|Z  
{ uf&N[M  
 if ((nID & 0xFFF0) == IDM_ABOUTBOX) ^_ojR4  
 { HV/cc"  
  CAboutDlg dlgAbout; dik9 >*"|o  
  dlgAbout.DoModal(); I=;+n-  
 } a {ab*tM  
 else ^GBe)~MT  
 { nhN);R~o"1  
  CDialog::OnSysCommand(nID, lParam); l$hJE;n  
 } S1U@UC  
} zm,@]!wI  
"k Te2iS  
void CCaptureDlg::OnPaint() D3c2^r $Z  
{ V)P&Zw  
 if (IsIconic()) s :`8ZBz~  
 { Cg616hyut  
  CPaintDC dc(this); // device context for painting 3 v")J*t  
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); Ys!>+nL|  
  // Center icon in client rectangle GHQ;hN:  
  int cxIcon = GetSystemMetrics(SM_CXICON); kPjd_8z2n  
  int cyIcon = GetSystemMetrics(SM_CYICON); ``A 0WN  
  CRect rect; zX#%{#9  
  GetClientRect(&rect); MC&\bf  
  int x = (rect.Width() - cxIcon + 1) / 2; _sy'.Fo  
  int y = (rect.Height() - cyIcon + 1) / 2; H_?o-L?+  
  // Draw the icon CU7F5@+  
  dc.DrawIcon(x, y, m_hIcon); ^2wLxXO6  
 } VxzkQ}o  
 else 6'W[{gzl  
 { -TZ p FT"  
  CDialog::OnPaint();  KQ[!o!%  
 } =H<0o?8?c  
} JCY~W=;v  
 8L*GE  
HCURSOR CCaptureDlg::OnQueryDragIcon() 8J)xzp`*)  
{ VxFOYC>p  
 return (HCURSOR) m_hIcon; $F.kK%-*  
} GTv#nnC  
bJ_cId8+  
void CCaptureDlg::OnCancel() V]S1X^  
{ OMk5{-8B  
 if(bTray) 0[<~?`:)  
  DeleteIcon(); tDDy]==E  
  CDialog::OnCancel(); G4 G5PXi  
} -{ u*qtp  
N S#TW  
void CCaptureDlg::OnAbout() !Oi~:Pp  
{ +PK6-c\r  
 CAboutDlg dlg; ,p;_\\<  
 dlg.DoModal(); I\ | N  
} Y qcD-K  
{RB-lfrWs  
void CCaptureDlg::OnBrowse() ~m*,mz  
{ )~jqW=d 2  
 CString str; h O emt  
 BROWSEINFO bi; [ $fJRR  
 char name[MAX_PATH]; [i]r-|_K  
 ZeroMemory(&bi,sizeof(BROWSEINFO)); Npn=cLC&  
 bi.hwndOwner=GetSafeHwnd(); UhmTr[&  
 bi.pszDisplayName=name; [_xyl e  
 bi.lpszTitle="Select folder"; $<p8TtI=YQ  
 bi.ulFlags=BIF_RETURNONLYFSDIRS; D5?phyC[Z  
 LPITEMIDLIST idl=SHBrowseForFolder(&bi); X bkb5EkA  
 if(idl==NULL) 7~M<cD  
  return; tZ2e!<C  
 SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH)); fE,9zUo  
 str.ReleaseBuffer(); r.0oxH']  
 m_Path=str; %i)B*9k  
 if(str.GetAt(str.GetLength()-1)!='\\') YxJD_R  
  m_Path+="\\"; bzi|s5!'<  
 UpdateData(FALSE); wcDjg&:=ml  
} G%# 05jH  
a <X0e>  
void CCaptureDlg::SaveBmp() T}7uew\v0<  
{ %~*jae!f  
 CDC dc; z (c9,3  
 dc.CreateDC("DISPLAY",NULL,NULL,NULL); FbACTeB  
 CBitmap bm; HI&kP+,y  
 int Width=GetSystemMetrics(SM_CXSCREEN); 7.bN99{xPM  
 int Height=GetSystemMetrics(SM_CYSCREEN); 0'$p$K  
 bm.CreateCompatibleBitmap(&dc,Width,Height); b4,jN~ci  
 CDC tdc; ``?6=mO  
 tdc.CreateCompatibleDC(&dc); A~lIa$U$b  
 CBitmap*pOld=tdc.SelectObject(&bm); klWYuStZ  
 tdc.BitBlt(0,0,Width,Height,&dc,0,0,SRCCOPY); h[XGC =%  
 tdc.SelectObject(pOld); wX1ig  
 BITMAP btm; +~2rW8  
 bm.GetBitmap(&btm); R_D c)  
 DWORD size=btm.bmWidthBytes*btm.bmHeight; )"O{D`uX  
 LPSTR lpData=(LPSTR)GlobalAllocPtr(GPTR,size); 6&2LWaWMo$  
 BITMAPINFOHEADER bih; ;)!"Ty|  
 bih.biBitCount=btm.bmBitsPixel; G5]1s  
 bih.biClrImportant=0; (&&87(  
 bih.biClrUsed=0; :cp   
 bih.biCompression=0;  [~Hg}-c  
 bih.biHeight=btm.bmHeight; 0o&}mKe  
 bih.biPlanes=1; <xS=#  
 bih.biSize=sizeof(BITMAPINFOHEADER); lWy=)^)4  
 bih.biSizeImage=size; s ?l%L!  
 bih.biWidth=btm.bmWidth; zREJ#r  
 bih.biXPelsPerMeter=0; Qs+k)e,  
 bih.biYPelsPerMeter=0; >R,?hWT  
 GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS); jOtX 60;  
 static int filecount=0; DpL8'Dib  
 CString name; :_d3//|  
 name.Format("pict%04d.bmp",filecount++); w!q&  
 name=m_Path+name; I6OSC&A`  
 BITMAPFILEHEADER bfh; CdhSp$>  
 bfh.bfReserved1=bfh.bfReserved2=0; JE%A|R<Jl  
 bfh.bfType=((WORD)('M'<< 8)|'B'); ?p8k{N(1  
 bfh.bfSize=54+size; r!/0 j)  
 bfh.bfOffBits=54; .?#uxd~>  
 CFile bf; dU;upS_-  
 if(bf.Open(name,CFile::modeCreate|CFile::modeWrite)){ -4L!k'uR  
  bf.WriteHuge(&bfh,sizeof(BITMAPFILEHEADER)); RSWcaATZN  
  bf.WriteHuge(&bih,sizeof(BITMAPINFOHEADER)); fB#XhO  
  bf.WriteHuge(lpData,size); VfSGCe  
  bf.Close(); 6GOcI#C9C  
  nCount++; V; 9 }7mw  
 } ]O!s 'lC  
 GlobalFreePtr(lpData); fCEz-TMW  
 if(nCount==1) CD?&<NV  
  m_Number.Format("%d picture captured.",nCount); (M% ;~y\  
 else rH}fLu8,;Q  
  m_Number.Format("%d pictures captured.",nCount); C%H9[%k  
  UpdateData(FALSE); oK-!(1A-  
} IbdM9qo7  
A'eAu  
BOOL CCaptureDlg::PreTranslateMessage(MSG* pMsg) EZ% .M*?  
{ g_D-(J`IK,  
 if(pMsg -> message == WM_KEYDOWN) B/YcSEY;  
 { A_r<QYq0|  
  if(pMsg -> wParam == VK_ESCAPE) StM/  
   return TRUE; {Jx7_T&  
  if(pMsg -> wParam == VK_RETURN) 8&a_A:h  
   return TRUE; ,hE/II`-d'  
 } M9V-$ _)  
 return CDialog::PreTranslateMessage(pMsg); Kd{#r/HZ  
} ~'BUrX\  
[n:PNB  
LRESULT CCaptureDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) <%,'$^'DS  
{ X!0kK8v  
 if(message==WM_HOTKEY&&lParam==WM_KEYDOWN){ VJ1*|r,  
  SaveBmp(); q`loOm=y  
  return FALSE; :Ee?K  
} ],?pe  
if(message==IDM_SHELL&&lParam==WM_RBUTTONUP){ .98.G4J>  
 CMenu pop; ul}'{|4  
 pop.LoadMenu(MAKEINTRESOURCE(IDR_MENU1)); q,,j',8kq/  
 CMenu*pMenu=pop.GetSubMenu(0); DPPS?~Pq  
 pMenu->SetDefaultItem(ID_EXITICON); dM|g`rr E  
 CPoint pt; B8 2,.?  
 GetCursorPos(&pt); uZ[/%GTX{)  
 int id=pMenu->TrackPopupMenu(TPM_RIGHTALIGN|TPM_NONOTIFY|TPM_RETURNCMD|TPM_LEFTBUTTON,pt.x,pt.y,this); Oc-u=K,B  
 if(id==ID_EXITICON) ze"~Ird  
  DeleteIcon(); L[]^{ O   
 else if(id==ID_EXIT) a @SUi~+3  
  OnCancel(); YmCbxYa7  
 return FALSE; 4_< nQ9K  
} 4[l^0  
LRESULT res= CDialog::WindowProc(message, wParam, lParam); <$C<Ba?;?  
if(message==WM_SYSCOMMAND&&wParam==SC_MINIMIZE) (n=Aa;  
 AddIcon(); ?Y!^I2Y6  
 return res; @W [{2d  
} i_YW;x  
'(9YB9 i  
void CCaptureDlg::AddIcon() B "n`|;r5  
{ rU*q@y Px  
 NOTIFYICONDATA data; 9UmBm#"  
 data.cbSize=sizeof(NOTIFYICONDATA); Y2vj}9jK  
 CString tip; e-!?[Ujv*%  
 tip.LoadString(IDS_ICONTIP); "w^Nu6  
 data.hIcon=GetIcon(0); & >b+loF  
 data.hWnd=GetSafeHwnd(); _sm;HH7'*  
 strcpy(data.szTip,tip); 4Bo<4 4-,  
 data.uCallbackMessage=IDM_SHELL; C@)pmSQ  
 data.uFlags=NIF_ICON|NIF_MESSAGE |NIF_TIP ; rys<-i(  
 data.uID=98; /d]~ly @uI  
 Shell_NotifyIcon(NIM_ADD,&data); # `58F.  
 ShowWindow(SW_HIDE); "8_,tYAH  
 bTray=TRUE; .P%ym~S  
} zW)gC9_|m-  
E.#6;HHzN  
void CCaptureDlg::DeleteIcon() q4k`)?k9  
{ k1wr/G'H[  
 NOTIFYICONDATA data; 9i[4"&K  
 data.cbSize=sizeof(NOTIFYICONDATA); fn?VNZ`J  
 data.hWnd=GetSafeHwnd(); Okoo(dfM  
 data.uID=98; |<2 *v-a  
 Shell_NotifyIcon(NIM_DELETE,&data); o#dcD?^  
 ShowWindow(SW_SHOW); ~1d!hq?/q  
 SetForegroundWindow(); AJ4r/b }  
 ShowWindow(SW_SHOWNORMAL); Z*h ;e;  
 bTray=FALSE; :R3P 58>  
} #ZF>WoC@e?  
n\* JaY  
void CCaptureDlg::OnChange() 0k.v0a7%  
{ aYBTrOdz  
 RegisterHotkey(); \L %q[  
} O$(c. (_$  
#'c%  
BOOL CCaptureDlg::RegisterHotkey() ,M{Q}:$+4  
{ Rj&qh`  
 UpdateData(); 'oCm.~;_  
 UCHAR mask=0; (qj,GmcS  
 UCHAR key=0; uwId  
 if(m_bControl) rx}*u3x=  
  mask|=4; F1\`l{B,\  
 if(m_bAlt) &! OGIYC(  
  mask|=2; qlEFJ5;  
 if(m_bShift) CX.SYr&!R  
  mask|=1; SLg+H  
  key=Key_Table[m_Key.GetCurSel()]; Q-jf8A]  
 if(bRegistered){ hLSTSD}  
  DeleteHotkey(GetSafeHwnd(),cKey,cMask); G#'Q~N  
  bRegistered=FALSE; drs-mt8  
 } Vl4Z_viNH  
 cMask=mask; !+=Zjm4L  
 cKey=key; |a>}9:g,=*  
 bRegistered=AddHotkey(GetSafeHwnd(),cKey,cMask); 8T<@ @6`T  
 return bRegistered; Z/n3aYM  
} [Ek42%  
)ib7K1GJ  
  四、小结 :TlAL# s&  
w)^\_uAlS  
  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