VB to find spyware?

I know there are more and more spyware search programs out there but if I wanted to write my own, can it be done in VB? How do they find the spyware exactly? Do you have to know exactly what to look for on each program that is sold as spyware?

Thanks!

I'm assuming it would function much like an AV scanner. Looks through the registry and the files on your PC for 'giveaway' signatures that it is spyware.

Just as a note, spyware is generally not 'sold,' more installed without the knowledge of your average user.

the difficult part is not to write a VB searching program. instead, it is to build a list of all spywares, the way they behave and what to look for.

for instance, a spyware could install itself in registry keys and drive locations: you have to identify these and make the program look for these specific keys/drive locations. and this, for every spyware out there. knowing that their main aim is to be hidden from you finding them easily... have fun.