Resizing drawings in a wxFrame

[Duncan Smith]

I have a general query about resizing drawings in a wxFrame.  I have tried
the usual? dc.SetUserScale(x/548.0, y/364.0) (where my original window is of
size 548, 364).  The trouble is that on a resize parts of the drawing tend
to disappear behind toolbars and statusbars.  I have tinkered a lot without
much success.  Does it just require more tinkering, or is there an obvious /
standard solution I'm missing?  Thanks in advance for any help.

Duncan