[comp.windows.ms] Windows 3.0 compatibility; Actor 2.0

aaron@jessica.Stanford.EDU (Aaron Wallace) (04/14/90)

As I understand the Windows 3.0 protected mode compatibility problem, most
"well-behaved" Windows 2.xx programs should run fine under Windows 3.0, and
I've heard that roughly half the popularly available freeware/shareware 
utilities in fact work fine under Windows 3.0 in protected mode.  The two
important criteria for Windows 3.0 compatibility were 1) not doing segment 
arithmetic and 2) tolerance of a proportional system font--although from screen
shots that have appeared in InfoWorld/PC Week it looks like Windows 3.0 
retains the fixed-width font for Windows 2.xx programs.

I should add the all Windows 2.xx programs should run under Windows 3.0 in
its real mode as long as there is enough free comventional/EMS memory.

Windows 3.0-aware programs have a marker in their .EXE file; when non-Win 3
programs are run under 3.0, a compatibility warning is displayed.  Some
programs like Excel refuse to run in protected mode; others seem to have
no problem.  Currently the only two Windows 3-aware programs I've heard of are
Actor 2.0 and Word for Windows--no warning is displayed when they are run.

It seems like it might be a good idea to post Windows 3.0 compatibility
findings (i.e. "I've found that XXX works fine under beta 3.0" or "XXX bombs")

Aaron Wallace