【Demo 0035】获取窗体状态

本章学习内容非常少就一个API(GetWindowPlacement)

1. 代码演示

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

     if ( NULL != hListbox && IsWindow ( hListbox ) && IsWindowVisible ( hWnd ))
     {
         TCHAR szWndInfo [512]    = {0};
         TCHAR szWndTitle [256]    = {0};
         TCHAR szClsName [64]        = {0};
         WINDOWPLACEMENT wp         = {0};
         wp . flags                 = 0;
         wp . length                 = sizeof ( wp );

         RECT rtWnd , rtClient ;
         GetWindowRect ( hWnd , & rtWnd );
         GetClientRect ( hWnd , & rtClient );
         GetWindowText ( hWnd , szWndTitle , 256);
         GetClassName ( hWnd , szClsName , 64);
         GetWindowPlacement ( hWnd , & wp );
         _stprintf ( szWndInfo ,
                   _T ( "\"%s\"" )
                   _T ( "  %d " )
                   _T ( "wnd[%d,%d,%d,%d], client[%d,%d,%d,%d], normal[%d,%d,%d,%d] min[%d, %d] max[%d, %d]" ),
                   szWndTitle ,
                   wp . showCmd ,
                   rtWnd . left , rtWnd . top , rtWnd . right , rtWnd . bottom ,
                   rtClient . left , rtClient . top , rtClient . right , rtClient . bottom ,
                   wp . rcNormalPosition . left , wp . rcNormalPosition . top , wp . rcNormalPosition . right , wp . rcNormalPosition . bottom ,
                   wp . ptMinPosition . x , wp . ptMinPosition . y ,
                   wp . ptMaxPosition . x , wp . ptMaxPosition . y );
         SendMessage ( hListbox , LB_ADDSTRING , 0, ( LPARAM ) szWndInfo );
     }

     return TRUE ;
}

2.  BOOL GetWindowPlacement(HWND hWnd, WINDOWPLACEMENT *lpwndpl )

     功能: 该函数返回指定窗口的显示状态以及被恢复的、最大化的和最小化的窗口位置

typedef struct _WINDOWPLACEMENT {

      UINT length;

      UINT flags;

      UINT showCmd;

      POINT ptMinPosition;

      POINT ptMaxPosition;

      RECT rcNormalPosition;

   } WINDOWPLACEMENT;

返回值说明: 

showCmd – 直接COPY MSDN

        SW_HIDE

Hides the window and activates another window.

  SW_MAXIMIZE

Maximizes the specified window.

  SW_MINIMIZE

Minimizes the specified window and activates the next top-level window in the z-order.

  SW_RESTORE

Activates and displays the window. If the window is minimized or maximized, the system restores it to its original size and position.

An application should specify this flag when restoring a minimized window.

  SW_SHOW

Activates the window and displays it in its current size and position.

  SW_SHOWMAXIMIZED

Activates the window and displays it as a maximized window.

  SW_SHOWMINIMIZED

Activates the window and displays it as a minimized window.

  SW_SHOWMINNOACTIVE

Displays the window as a minimized window.

             This value is similar to SW_SHOWMINIMIZED, except the window is not activated.

  SW_SHOWNA

Displays the window in its current size and position. 

              This value is similar to SW_SHOW, except the window is not activated.

  SW_SHOWNOACTIVATE

Displays a window in its most recent size and position.

              This value is similar to SW_SHOWNORMAL, except the window is not actived.

  SW_SHOWNORMAL

 

演示代码