The routines in these files (wdiag.h, wdiag.c) are useful for debugging 
Xt Widgets.  

They were originally written by Oliver Jones for a talk on developing 
X11 applications presented in 1991.  He has kindly given permission 
for them to be placed in the contrib area on export.lcs.mit.edu.

These routines are, of course, provided as-is and with no warantee
whatsoever.