winform控件在Enable=false的情况下改变它的字体颜色

[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;

        }