What version did I use? Can you tell?

I have an older app I need to recompile.
I thought it was on wptools5, but after installing the package, I get lots of errors that properties do not exist.
So, it was either written on 3.09 or 4.x. Is there any way I can tell what version I was using in the program code so I can get the correct VCL version installed to my D5 pallet?
Thanks.
-d

If unit WPDefs was linked in, then it was NOT V5 (or later).

V3 and V4 were similar. But V4 introduced Actions (WPAction), the Gutter (WPGutter), introduced WPWordConv unit.