SUB that draws boxes with rounded corners.

[RhoSigma]

Basically you could also take my Polygon drawing library.

Just define the shape of the box as series of x/y points and then call FillPolygon.

I use this e.g. in my GuiTools to draw the tooltip speaking bubbles as you see in the pictures here, but basically every shape would be possible like sine wave borders or ellipse boxes etc..