• C

Int 21h (5Ch) record lock example

I need a short example program that shows how to lock a region of bytes in a file using DOS function 92.  Thanks!
whatsup050300Asked:
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kulinaConnect With a Mentor Commented:
Can you use LockFile and UnlockFile? These are wrappers for int 21h 5ch. Here are the links anyway:
http://msdn.microsoft.com/library/en-us/fileio/hh/winbase/filesio_63xh.asp?frame=true

http://msdn.microsoft.com/library/en-us/fileio/hh/winbase/filesio_1jl1.asp?frame=true

Let me know if you need an example.
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whatsup050300Author Commented:
LockFile and UnlockFile sound like they'd work fine... trick is whether they'll play nice with an old (network aware) DOS app.  I'll do some experimenting but if you've got a moment to put together a short example program it'd be much appreciated... the c skills are quite rusty at this point.  Thanks!
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kulinaCommented:
OK, will do. Meanwhile you may browse through Microsoft's example; it may help:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/hh/winbase/filesio_8l6b.asp

Regards.
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