The whole thing seems convoluted. You have a separate application that, every 3 seconds will either create this folder if it doesn't exist, or will delete the folder if it does. So every 3 seconds it goes from existing, to non-existing, to existing, to non-existing, ...

Then, every 15 seconds, this other application displays AnotherForm if hWnd != 1 Or the directory in question doesn't exist. Because the directory in question doesn't exist half of the time, I would expect AnotherForm to be displayed every other time that 15 second timer is ran, so every 30 seconds or so (with some variance as far as how closely the two timers are aligned).

I think the help you need is only going to happen if you explain, in detail what, exactly, you are trying to accomplish with this convoluted timer and folder stuff.

As it stands, I doubt anyone has a clue what your end goal is and therefore no specific coding help can be offered.

Good luck.