AUI_IMAGE enhancement: IMGOP_ACQUIRE now supports optional ability to set the pagesize.
xcall AUI, AUI_IMAGE, IMGOP_ACQUIRE, handle, status, filespec, attribs (,appname {,pages, scanflags {,pagesize}}}
Pagesize options are defined in the ashinc:ashell.def file, the most common options being:
TWSS_A4LETTER = 1
TWSS_USLETTER = 3
TWSS_USLEGAL = 4
