重载“最小化”的实现方法

  
    

   
     const
   
      
   
     int
   
      WM_SYSCOMMAND 
   
     =
   
      
   
     0x112
   
     ; 

   
     const
   
      
   
     int
   
      SC_CLOSE 
   
     =
   
      
   
     0xF060
   
     ; 

   
     const
   
      
   
     int
   
      SC_MINIMIZE 
   
     =
   
      
   
     0xF020
   
     ; 

   
     const
   
      
   
     int
   
      SC_MAXIMIZE 
   
     =
   
      
   
     0xF030
   
     ; 


   
     protected
   
      
   
     override
   
      
   
     void
   
      WndProc(
   
     ref
   
      Message m) 
{ 
 
   
     if
   
      (m.Msg 
   
     ==
   
      WM_SYSCOMMAND) 
 { 
 
   
     if
   
      (m.WParam.ToInt32() 
   
     ==
   
      SC_MINIMIZE) 
 { 
 
   
     this
   
     .Visible 
   
     =
   
      
   
     false
   
     ; 
 
   
     return
   
     ; 
 } 
 } 
 
   
     base
   
     .WndProc(
   
     ref
   
      m); 
}