This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)
NETLink Guide
Calling COM & DLLs in Mathematica
COM Objects
LoadCOMTypeLibrary load a type library for use in Mathematica
CreateCOMObject, ReleaseCOMObject create or release COM objects
GetActiveCOMObject acquire an already-running COM object
Using DLLs
DefineDLLFunction create a Mathematica function that calls a DLL function