Need to wrap a dll so it can be used in VB.Net

Question

Hi. I have a commercial dll which is invisible to VB.net, ie. I can't use it. I think I need to put it in a wrapper.

Are there some dlls that can't be wrapped? What do I need to know about the dll to determine whether it can be wrapped?

I'm OK in VB.net, but no knowledge of VC++, C# etc.

I've seen tutorials, but they refer to a dll which a) can be wrapped, and b) about which you know everything. I have some documentation as to calls etc., but nothing more.

Thank you.

More info: the dll is to do with waking up a battery-operated Bluetooth printer that has fallen asleep to conserve battery charge. The printer is 'connected' to a battery operated handheld Windows CE terminal, like parcel delivery drivers have. The dll is an Atinav product, and they have gone bust, I think. Allegedly.