Question:
My 16bit application requires the presence of a DOS environment variable. On startup I check for it. If it does not exist I display an error. I would like create the environment variable through my VB code. Is this possible?
Answer:
Unfortunately, no, that is not really possible. Under Windows 3.x, it's concievable that you could trace through the chain of memory blocks allocated, and write to the master environment block, but that's a technique that's not only fraught with potential disaster but also not future-compatable at all.
I would suggest, instead, that you prompt the user for this information if it's missing, and offer to update their AUTOEXEC.BAT so it will be there next time around.
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