Getting Monitors and Monitor Resolutions?

[Wesley Miaw <wesley@bmrc.berkeley.edu>]

Does anyone know how to get from within Tk the number of monitors and
resolutions/pixel offsets of those monitors? ag-vic seems to require
DirectDraw C code to find out this information for multiple monitors. Is
this the only way to do it? The DirectDraw code returns a list of
coordinates, so the second monitor's coordinates might be something like
1024,0 to 2047,768 (placed to the right of the first/root monitor).

Thanks,
-- 
Wesley Miaw, Assistant Systems Administrator
Berkeley Multimedia Research Center
wesley@bmrc.berkeley.edu