[C#] UI Control 둥근 테두리 만들기

[DllImport("Gdi32.dll", EntryPoint = "CreateRoundRectRgn")]
private static extern IntPtr CreateRoundRectRgn(int nLeftRect,
          int nTopRect, int nRightRect, int nBottomRect, int nWidthEllipse, int nHeightEllipse);
 
private void Form1_Load(object sender, EventArgs e) {
    pnlComponent.Region = Region.FromHrgn(CreateRoundRectRgn(0, 0, pnlComponent.Width, pnlComponent.Height, 15, 15));
    lblCAM.Region = Region.FromHrgn(CreateRoundRectRgn(0, 0, lblCAM.Width, lblCAM.Height, 15, 15));
    lblPOWER.Region = Region.FromHrgn(CreateRoundRectRgn(0, 0, lblPOWER.Width, lblPOWER.Height, 15, 15)); 
}