The unsigned 32-bit integer is a Win32 color, so you can use the System.Drawing.ColorTranslator class's ToWin32 method to convert a System.Drawing.Color to an integer. To convert the integer to an unsigned integer, use Convert.ToUInt32. Here's an example:
Dim lineColor As Integer = ColorTranslator.ToWin32(Color.Red)
Graph.Plots.Item(1).LineColor = Convert.ToUInt32(lineColor)
- Elton