I am using this code to make my form (FormBorderStyle=none) with rounded edges:
[DllImport("Gdi32.dll", EntryPoint = "CreateRoundRectRgn")]
private static extern IntPtr CreateRoundRectRgn
(
int nLeftRect, // x-coordinate of upper-left corner
int nTopRect, // y-coordinate of upper-left corner
int nRightRect, // x-coordinate of lower-right corner
int nBottomRect, // y-coordinate of lower-right corner
int nWidthEllipse, // height of ellipse
int nHeightEllipse // width of ellipse
);
public Form1()
{
InitializeComponent();
Region = System.Drawing.Region.FromHrgn(CreateRoundRectRgn(0, 0, Width, Height, 20, 20));
}
And this to set a custom border on the Paint event:
ControlPaint.DrawBorder(e.Graphics, this.ClientRectangle, Color.Black, 5, ButtonBorderStyle.Solid, Color.Black, 5, ButtonBorderStyle.Solid, Color.Black, 5, ButtonBorderStyle.Solid, Color.Black, 5, ButtonBorderStyle.Solid);
But see this .
The inside form rectangle doesn't have rounded edges.
How can I make the blue inside form rectangle to have rounded edge too so it wont look like the screenshot?
The Region propery simply cuts off the corners. To have a true rounded corner you will have to draw the rounded rectangles.
It might be easier to draw an image of the shape you want and put that on the transparent form. Easier to draw but cannot be resized.