Obtains the width of the image stored in Rosetta's memory buffer
Usage:
imgWidth (object me)
Parameters:
None
Returns:
(integer) - the width of the image in pixels
Example:
xtRose = xtra("Rosetta").new( )
xtRose.imgOpen( "C:\windows\winnt.bmp" )
nW = xtRose.imgWidth( )
Notes: