How to get the motherboard serial number?

Hi

i am writting an application which will encrypt the motherboards serialnumber and other info to do an activation of my application.

inevitably locking my program to a specific PC.

Does anyone know how i can get the motherboards serial number?

I tried the wmi but get so many errors like missing prototype and not declared.

I dont know when to start using the Windows Management Instrumentation with regards to Lab windows/CVI.

Can anyone help me?

Thanks

Shako