Image display problems

Help! I have inherited a win16 executable without any source. The program
works fine in 9x but the graphics are wrong under ntvdm. I think it is has
to do with image transparency. The program displays 1 or more images on top
of its main window but whites out and cant see the stuff under overlaid
image. Has anybody fixed this problem before?

Question 2: I think I have all the tools to find the problem except for the
smarts of how to use them. I have loaded NT4 Checked and trying to locate
the GDI or mouse clicks to figure out where the graphics are coming from.
Is there a way to look at the .dbg files to see the addresses of the symbol?

Any help would be appreciated!

Chuck Armstrong