🚀 go-pugleaf

In article <1992Apr8.113011.23572@descartes.waterloo.edu>, wjbaird@descartes.waterloo.edu (Warren Baird) writes...
 > 
 >I have a few questions about DECWindows under VMS that hopefully
 >someone can help me answer.
 > 
 >1)  The information that I've seen implies that DECWindows under VMS is
 >an X11 varient, but I haven't been able to find the relationship
 >between various versions of DECWindows and the releases of X11.  Is
 >there an easy way to tell whether a version of DECWindows is X11R3 or
 >X11R4?

DECWINDOWS on VAX/VMS 5.4 and upwards is X11R4 compliant

>2) Is VMS DECWindows a full X11 distribution?  Does it support all of
>the XLib toolkit?  Are there any other toolkits that are always
>included?
> 

VMS DECWindows is not a full X11 distribution. i.e. you can't build your own
servers, etc. There's no Athena widget set. But we do have the complete Xlib
and Xtoolkit. DECWindows is now based on OSF/MOTIF altough the old DEC XUI 
widgetset is stil included.

>3) Is there any easy way for X programs running under VMS (with the
>DECNet protocol, I suppose) to communicate with X servers running under
>Unix? (either Ultrix or otherwise)

DECWindows supports 3 types of transport: TCP/IP, DECnet, LAT There's no 
problem using other OS's X-servers as long as they speak your language, that 
means X and one of the transports above.

>4) Are there any special issues that have to be addressed in porting an
>XLib-based program from Unix to VMS?

Not that I now of except for the usual things of porting normal "C" programs to 
the VMS platform (file system stuf etc.) X-wise there's no difference. There 
are people who ported the Athena widget set to VAX/VMS. I ported many programs 
published in comp.sources.x to VAX/VMS. (example: XV)

Peter Beyer 
Digital Equipment b.v. Holland
Internet: beyer@utrtsc.Enet.dec.com