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Not sure about the question. Remember, these are windows on a bitmapped
workstation with a graphics processor and not all windows are terminal
emulation windows . Where a terminal emulator supports REGIS, etc.,
those commands are likely translated into lower level Xlib graphics
routines.
In the X environment you have
Xlib
routine
calls Requests
Client --------> Xlib -------> Server -->Common -> Output ->monitor
<------- <------ Driver Driver (window)
Xlib/server Replies
messages & events
where a client could be a terminal emulator, Xclock, xtrek, etc.
Refer to the "VMS Decwindows Technical Summary" and "VMS DECWindows
Device Driver Manual". If you want to write a device driver, there
are code examples around, particularly on the MIT release tape.
Hope this helps, though I probably did not answer your question.
clay
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