سورس کد حرکت دادن فرم بدون حاشیه در سی شارپ

private void Form1_Load(object sender, EventArgs e)
{
     this.FormBorderStyle = FormBorderStyle.None;
}

private const int WM_NCHITTEST = 0x84;
private const int HTCLIENT = 0x1;
private const int HTCAPTION = 0x2;

protected override void WndProc(ref Message message)
{
    base.WndProc(ref message);
    if (message.Msg == WM_NCHITTEST && (int)message.Result == HTCLIENT)
        message.Result = (IntPtr)HTCAPTION;
}