Serial number issue

How does a customer enter the serial number in a protected DLL?

Thank you for your time.

This is described quite well in the user manual.
In two words, you need to call VMProtectSetSerialNumber() before executing protected code.

MASM example?

I speak english not very good. thank yous for this.

Unfortunately we have no a MASM example. Please try to use the MSVC example from “VMProtect Ultimate\Examples\Licensing” directory.