unknown MFC, .tmp files?

[manav]

I have files named MFC2B3.tmp, MFC2B7.tmp, MFC2B5.tmp on my system.
I doubt they may be generated by MSVS, but not sure.

Does any one have any idea about these kind of files? They are all '0' size.

[Elysia]

Close Visual Studio. Still there? Then clean 'em.
Generally, any application that leaves files in the temp directory do not expect them to be there next time is starts or needs them next time, so you can clean them all away if the application that uses them is finished.