Wang imaging controls

[Travis Bauer <travis.bauer@ptsem.edu>]

I'm trying to make the Wang imaging OLE controls work with C++ Builder
1.  The control is on my VCL toolsbar and I can drop it on a form,
compile, and run a form with the controls on it.  The problem is knowing
how to access the methods.

The biggest problem is how to call the following method:

void __stdcall ShowFileDialog(Olectrls::TOleEnum DialogOption, const
System::Variant &hParentWnd);

What do I pass into the second parameter?  The documentation says that
the parameter is optional.  How do I leave it out?

Travis