枚举窗口及其应用

 

枚举窗口及其应用

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示例代码下载：枚举窗口及其应用（请不要直接使用迅雷下载）

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1.下面请看几种枚举窗口的方式

 

一：利用GetWindow(ParentWnd, GW_CHILD);

void FindAllChildWnd(HWND ParentWnd){ HWND hChild = ::GetWindow(ParentWnd, GW_CHILD); for(; hChild!=NULL ; hChild=::GetWindow(hChild,GW_HWNDNEXT)) { TCHAR WindowText[30]={0}; ::SendMessage(hChild,WM_GETTEXT,(WPARAM)(sizeof(WindowText)/sizeof(TCHAR)),(LPARAM)WindowText); TCHAR ClassName[30]={0}; ::GetClassName(hChild,ClassName,sizeof(ClassName)/sizeof(TCHAR)); trace2(WindowText,ClassName); FindAllChildWnd(hChild); }}void CDemoDlg::OnButton1() { FindAllChildWnd(::GetForegroundWindow());} 

 

二：利用回调函数EnumChildProc枚举所有子窗口

BOOL CALLBACK EnumChildProc(HWND hwnd,LPARAM lParam) { TCHAR WindowText[100]={0}; ::SendMessage(hwnd,WM_GETTEXT,(WPARAM)(sizeof(WindowText)/sizeof(TCHAR)),(LPARAM)WindowText); TCHAR ClassName[100]={0}; ::GetClassName(hwnd,ClassName,sizeof(ClassName)/sizeof(TCHAR)); trace2(WindowText,ClassName); return TRUE ; }void CDemoDlg::OnButton2() { ::EnumChildWindows(::GetForegroundWindow(),EnumChildProc,NULL);} 

 

三：利用回调函数EnumChildProc枚举所有可见的桌面窗口

BOOL CALLBACK EnumWindowsProc(HWND hwnd,LPARAM lParam){ if ( GetParent(hwnd)==NULL && IsWindowVisible(hwnd) ) { TCHAR WindowText[100]={0}; ::SendMessage(hwnd,WM_GETTEXT,(WPARAM)(sizeof(WindowText)/sizeof(TCHAR)),(LPARAM)WindowText); trace(WindowText); } return true; } void CDemoDlg::OnButton3() { EnumWindows(EnumWindowsProc ,(LPARAM)0 );} 

 

四：利用FindWindowEx寻找指定类名或窗口标题的窗口句柄

//简单的寻找子窗口句柄 HWND hwnd=::FindWindowEx(m_hWnd,NULL,"#32770",NULL);  

 

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2.枚举窗口的应用

 

应用一:寻找指定类名的窗口句柄。

（1）单一函数的形式

/****************************************************************************寻找指定类名的窗口句柄 方法一****************************************************************************/HWND FindWithClassName(HWND ParentWnd,TCHAR* FindClassName){ HWND hChild = ::GetWindow(ParentWnd, GW_CHILD); for(; hChild!=NULL ; hChild=::GetWindow(hChild,GW_HWNDNEXT)) { TCHAR ClassName[100]={0}; ::GetClassName(hChild,ClassName,sizeof(ClassName)/sizeof(TCHAR)); if (_tcscmp(ClassName,FindClassName)==0) return hChild; HWND FindWnd=FindWithClassName(hChild,FindClassName); if (FindWnd) return FindWnd; } return NULL;}//调用void CDemoDlg::OnButton6() { HWND hWnd=FindWithClassName(::GetForegroundWindow(),"Edit"); if (hWnd) { TCHAR WindowText[100]={0}; ::SendMessage(hWnd,WM_GETTEXT,(WPARAM)(sizeof(WindowText)/sizeof(TCHAR)),(LPARAM)WindowText); trace(WindowText); } else { trace("can not find"); }} 

（2）类的形式

/****************************************************************************寻找指定类名的窗口句柄 方法二****************************************************************************/class CFindWithClassName{public: static HWND FindWnd; static TCHAR ClassName[100]; static BOOL CALLBACK EnumChildProc(HWND hwnd,LPARAM lParam) { ::GetClassName(hwnd,ClassName,sizeof(ClassName)/sizeof(TCHAR)); if (_tcscmp(ClassName,(TCHAR*)lParam)==0) { FindWnd=hwnd; return false; } return TRUE ; } static HWND Find(HWND hwndParent, TCHAR* FindClassName) { ::EnumChildWindows(hwndParent,EnumChildProc,(LPARAM)FindClassName); return FindWnd; }};HWND CFindWithClassName::FindWnd=NULL;TCHAR CFindWithClassName::ClassName[100]=_T("");//调用void CDemoDlg::OnButton7() { HWND hWnd=CFindWithClassName::Find(::GetForegroundWindow(),_T("Edit")); if (hWnd) { TCHAR WindowText[100]={0}; ::SendMessage(hWnd,WM_GETTEXT,(WPARAM)(sizeof(WindowText)/sizeof(TCHAR)),(LPARAM)WindowText); trace(WindowText); } else { trace("can not find"); }} 

 

（3）大师Paul DiLascia写的。

////////////////////////////////////////////////////////////////// MSDN Magazine -- August 2003// If this code works, it was written by Paul DiLascia.// If not, I don't know who wrote it.// Compiles with Visual Studio .NET on Windows XP. Tab size=3.//// ---// This class encapsulates the process of finding a window with a given class name// as a descendant of a given window. To use it, instantiate like so://// CFindWnd fw(hwndParent,classname);//// fw.m_hWnd will be the HWND of the desired window, if found.//class CFindWnd {private: ////////////////// // This private function is used with EnumChildWindows to find the child // with a given class name. Returns FALSE if found (to stop enumerating). // static BOOL CALLBACK FindChildClassHwnd(HWND hwndParent, LPARAM lParam) { CFindWnd *pfw = (CFindWnd*)lParam; HWND hwnd = FindWindowEx(hwndParent, NULL, pfw->m_classname, NULL); if (hwnd) { pfw->m_hWnd = hwnd; // found: save it return FALSE; // stop enumerating } EnumChildWindows(hwndParent, FindChildClassHwnd, lParam); // recurse return TRUE; // keep looking }public: LPCSTR m_classname; // class name to look for HWND m_hWnd; // HWND if found // ctor does the work--just instantiate and go CFindWnd(HWND hwndParent, LPCSTR classname) : m_hWnd(NULL), m_classname(classname) { FindChildClassHwnd(hwndParent, (LPARAM)this); }};void CDemoDlg::OnButton5() { CFindWnd fw(::GetForegroundWindow(),"Edit"); TCHAR WindowText[30]={0}; ::SendMessage(fw.m_hWnd,WM_GETTEXT,(WPARAM)(sizeof(WindowText)/sizeof(TCHAR)),(LPARAM)WindowText); trace(WindowText);} 

 

 

 

应用二:寻找指定控件ID的窗口句柄。

子控件的ID使用spy++(VS2008版本) 查看获得

 

（1）方法一，类的形式

class CFindWithID{public: static BOOL CALLBACK _EnumChildProc( HWND hwnd, LPARAM lParam ) { //*(DWORD*)lParam 即是传进来的Control ID if ( GetDlgCtrlID(hwnd) == *(DWORD*)lParam )//判断是否为需要的控件 { *(HWND*)lParam=hwnd; //强制转换 return FALSE; } return TRUE; } static HWND Find(HWND TopWnd, DWORD ControlID ) { EnumChildWindows( TopWnd , _EnumChildProc, (LPARAM)&ControlID ); return ::IsWindow( (HWND)ControlID ) ? (HWND)ControlID : NULL; } };void CDemoDlg::OnButton8() { HWND hWnd=CFindWithID::Find(::GetForegroundWindow(),0x000003e9); if (hWnd) { TCHAR WindowText[100]={0}; ::SendMessage(hWnd,WM_GETTEXT,(WPARAM)(sizeof(WindowText)/sizeof(TCHAR)),(LPARAM)WindowText); trace(WindowText); } else { trace("can not find"); } } 

 

（2）方法二：（单一函数的形式）

HWND FindControlWnd(HWND ParentWnd,DWORD ControlID){ HWND hChild = ::GetWindow(ParentWnd, GW_CHILD); for(; hChild!=NULL ; hChild=::GetWindow(hChild,GW_HWNDNEXT)) { //判断是否为需要的控件 if ( GetDlgCtrlID(hChild) == ControlID ) return hChild; HWND FindWnd=FindControlWnd(hChild,ControlID); if (FindWnd) return FindWnd; } return NULL;}void CDemoDlg::OnButton9() { HWND hWnd=FindControlWnd(::GetForegroundWindow(),0x000003e9); if (hWnd) { TCHAR WindowText[100]={0}; ::SendMessage(hWnd,WM_GETTEXT,(WPARAM)(sizeof(WindowText)/sizeof(TCHAR)),(LPARAM)WindowText); trace(WindowText); } else { trace("can not find"); } } 

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