【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_MAXIMIZEMaximizes the specified window.   SW_MINIMIZEMinimizes the specified window and activates the next top-level window in the z-order.   SW_RESTOREActivates 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_SHOWActivates the window and displays it in its current size and position.   SW_SHOWMAXIMIZEDActivates the window and displays it as a maximized window.   SW_SHOWMINIMIZEDActivates the window and displays it as a minimized window.   SW_SHOWMINNOACTIVEDisplays the window as a minimized window.

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

  SW_SHOWNADisplays the window in its current size and position. 

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

  SW_SHOWNOACTIVATEDisplays 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

转载于:https://www.cnblogs.com/ztercel/archive/2011/08/26/2155197.html