Are dashed grid lines possible without bitmap background?

Hi,

I am trying to get dashed grid lines onto my graph.  Having searched around, I suspect that I can only achieve this by setting the background as a bitmap that has the dashed lines on.  Is this correct?

I think that this was addressed in the .NET version, which now has this functionality, but not in the (legacy) VC++ version.  I just wanted to confirm that this was the case.