Running Applications on a Different Machine

Just when I think I am starting to understand this stuff, along comes another

silly annoying problem. I am designing an application for business purposes

(which is going extremely thanks in no small part to this board) and I recently

tried to run it on a different machine (that did not have VC++ installed) when

lo and behold it could not execute due to missing dll's.

How do I find which dll's I need? Do I have to write my own? I found similar

files on the machine I was using (mfc42.dll instead of mfc42d.dll) however I am

not sure if I can use these or not.

Thanx

Sean M.