winform控件在Enable=false的情況下改變它的字體顏色

[System.Runtime.InteropServices.DllImport("user32.dll ")]

         public  static  extern  int  SetWindowLong(IntPtr hWnd,  int  nIndex,  int  wndproc);

         [System.Runtime.InteropServices.DllImport( "user32.dll " )]

         public  static  extern  int  GetWindowLong(IntPtr hWnd,  int  nIndex);

 

         public  const  int  GWL_STYLE = -16;

         public  const  int  WS_DISABLED = 0x8000000;

 

         public  static  void  SetControlEnabled(Control c,  bool  enabled)

         {

             if  (enabled)

             { SetWindowLong(c.Handle, GWL_STYLE, (~WS_DISABLED) & GetWindowLong(c.Handle, GWL_STYLE)); }

             else

             { SetWindowLong(c.Handle, GWL_STYLE, WS_DISABLED + GetWindowLong(c.Handle, GWL_STYLE)); }

         }

 

         private  void  button2_Click( object  sender, System.EventArgs e)

         {

             SetControlEnabled( this .button1,  false );

             this .button1.ForeColor = Color.White;

         }