Saving object values in a textfile.

[RealNickyDude]

How do I save objects values in a textfile? Particularly the backcolour of an object? This is what I have:

Function SaveFile()
        FileOpen(1, Application.StartupPath & "config.ini", OpenMode.Output)
        PrintLine(1, TreeView1.BackColor)
        FileClose(1)
    End Function

But it's throwing an exception:

-------------------------------------------------------------------
An unhandled exception of type 'System.ArgumentException' occurred in microsoft.visualbasic.dll

Additional information: File I/O with type 'Color' is not valid.
-----------------------------------------------------------------------

Any help on how to save objects values in a textfile?

Thanks.