Quick update.
Found out that later versions of vMac 0.18 dropped Win32s support.
It's mentioned in the readme files.
Maybe that's why the graphical glitches with v0.18b occured.
This is what readme of v0.18c said about the predecessor v0.18b:
*New since 0.18b*
-Icon bar instead of vMac menu
-Shows a ROM with a flashing X on it when there is a problem with the ROM file
[…]
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*New since 0.18b*
-Icon bar instead of vMac menu
-Shows a ROM with a flashing X on it when there is a problem with the ROM file
-After you run vMac Win32, it gives .ROM and .DSK files an icon
-Common dialog box for inserting disks (instead of inserting disks 1-4)
-Fixed bug that prevented using paths with spaces
-Draws splash screen faster
-No more Splash.dat, now its vMac.dat - it contains the splash screen, ROM
pictures, and icon bar
-No longer runs on Windows 3.1/3.11 with Win32s - it always ran poorly under
Win32s anyway
-Real Time Clock runs at real time
-Its a bit faster
This is in contrast to the readme of my copy of v0.18b (beta ?), which said:
[…]
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It should run on the below operating systems:
-Windows 95 (works)
-Windows NT (works under 4.0, untested under other versions)
-Windows 3.1 or 3.11 with Win32s 1.15 or better (*untested*)
This makes me believe that v0.18b never really ran on Win32s.
Either the ports are from different authors, betas or they just realized by the time that v0.18c was out
that the previous version was truely incompatible with Win32s - the "untested" note in readme v0.18b makes this a possibility.
Edit: Just tried another version of v0.18 (another b?) and it closed with an error message.
Edit: Followed a forum discussion about compiling vMac on Win95 with Visual C++ 1.1. The author, who's also writting stuff for Windows 1/2 (see his/her YT channel) comes to this conclusion:
"I had tested that on Win32s, it cannot even properly display the "ROM not found" message! seems Win32s doesn't have proper DIB support."
Source: https://www.emaculation.com/forum/viewtopic.php?t=6176
Edit: Please note - The other (earlier) v0.18b that executes on Win32s isn't attached down here, but in archive #2.
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