C# enable为false时不变颜色

 1         [System.Runtime.InteropServices.DllImport("user32.dll ")]
 2         public static extern int SetWindowLong(IntPtr hWnd, int nIndex, int wndproc);
 3         [System.Runtime.InteropServices.DllImport("user32.dll ")]
 4         public static extern int GetWindowLong(IntPtr hWnd, int nIndex);
 5  
 6         public const int GWL_STYLE = -16;
 7         public const int WS_DISABLED = 0x8000000;
 8  
 9         public static void SetControlEnabled(Control c, bool enabled)
10         {
11             if (enabled)
12             { SetWindowLong(c.Handle, GWL_STYLE, (~WS_DISABLED) & GetWindowLong(c.Handle, GWL_STYLE)); }
13             else
14             { SetWindowLong(c.Handle, GWL_STYLE, WS_DISABLED + GetWindowLong(c.Handle, GWL_STYLE)); }
15         }
16  
17         private void button2_Click(object sender, System.EventArgs e)
18         {
19             SetControlEnabled(this.button1, false);
20             this.button1.ForeColor = Color.White;
21         }
这个操作不是直接改变Enable 而是去掉它的鼠标绑定