【Demo 0033】遍历窗体中控件

今天学习的内容在Demo032中基本上己学过了， 此例仅在Demo32基础上做了一点延伸。

在上节中我们了解EnumchildWindows遍历桌面的子窗体， 本节使 用此函数来获取窗体中所有控件.

一、代码演示

//////////////////////////////////////////////////////////////////////////
BOOL CALLBACK EnumChildWndProc ( HWND hWnd , LPARAM lParam )
{
     HWND hListbox = ( HWND ) lParam ;
     if ( NULL == hWnd )     return FALSE ;

     if ( NULL != hListbox && IsWindow ( hListbox ))
     {
         TCHAR szWndInfo [512]    = {0};
         TCHAR szWndTitle [256]    = {0};
         TCHAR szClsName [64]        = {0};

         GetWindowText ( hWnd , szWndTitle , 256);
         GetClassName ( hWnd , szClsName , 64);
         _stprintf ( szWndInfo ,
                   _T ( "´°¿Ú%08X " )
                   _T ( "\"%s\" " )
                   _T ( "%s " )
                   _T ( "%s" ),
                   hWnd ,
                   szWndTitle ,
                   szClsName ,
                   IsWindowVisible ( hWnd ) ? _T ( "Visible" ) : _T ( "Invisible" ));
         SendMessage ( hListbox , LB_ADDSTRING , 0, ( LPARAM ) szWndInfo );
     }

     return TRUE ;
}

HWND hListbox     = GetDlgItem ( hWnd , IDC_LSTWNDLIST );
SendMessage ( hListbox , LB_RESETCONTENT , 0, 0);

HWND hParent = FindWindowEx ( NULL , NULL , _T ( "Notepad" ), NULL );
EnumChildWindows ( hParent , WndEnumProc , ( LPARAM ) GetDlgItem ( hWnd , IDC_LSTWNDLIST ));

SetWindowText ( GetDlgItem ( hWnd , IDC_BTNDATAREAD ), _T ( "Refresh" ));

TCHAR szTmp [128];
DWORD dwcount = SendMessage ( GetDlgItem ( hWnd , IDC_LSTWNDLIST ), LB_GETCOUNT , 0, 0);
_stprintf ( szTmp , _T ( "size: %d" ), dwcount );
OutputDebugString ( szTmp );

     本例以Notepad 窗体为目标， 通过EnumChildWindows 获取NotePad中所有的控件

二、显示结果

    

    运行后发现NodePad 有两个控件1. Edit 2. statusbar  且不可见

演示代码

转载于:https://www.cnblogs.com/ztercel/archive/2011/08/24/2152612.html