using Dll without TLB file

hello,
Can anyone tell me how i can use a an external DLL in VB6.
Normally we add a reference, but since this is an external DLL i
get an error while adding a reference so i want to know how to
use the dll and its methods and properties.Any inputs in this
regard will be highly appreciated.
Thanks
Madhu

First of all you have to find out whether this DLL is meant to work with VB (i.e whether it uses BSTRs as strings and such). If it's not you will need to develop COM wraper around this dll.