I have read that MWM had WSM in the past, and that is included in the demos/programs folder in the source code for 2.3.8.
However, there is a note stating that the functionality to support was removed in 2.1.
As Motif is quite a legacy toolkit now the information available on this is obviously limited, I am wondering if somebody would still now (or remember from past days) which are the options to implement that kind of functionality in Motif.
I know such functionality is included in CDE which is now open sourced, but I do not like CDE.