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how do i get a batch file to tell the defferince between command.com and cmd.exe?
thanks

Hmm, I don't know what exactly you need.
You could use a batch file with a command and /? in each line to get the Windows help for this command. In case a command has a different or additional syntax, you would find a passage starting with

If Command Extensions are enabled ...

That means these things are valid only for cmd.exe.

Here you will find all commands too.

Regards
aGerman