winform使用左键移动窗体

/// <summary>设置可以鼠标左键让窗体移动的控件
/// </summary>
/// <param name="form">待移动的窗体，通常是设置了FormBorderStyle = FormBorderStyle.None的窗体</param>
/// <param name="control">能控制窗体左键移动的控件</param>
public static void SetMoveFormControl(Form form, Control control)
{
    control.MouseDown += (s, e) =>
    {
        ReleaseCapture();
        SendMessageA((int)form.Handle, 0xa1, 2, 0);
    };
}
[DllImport("user32.dll")]
private static extern int ReleaseCapture();
[DllImport("user32.dll")]
private static extern int SendMessageA(int hwnd, int wMsg, int wParam, int lParam);