BSTR is the type used in VC++ (and idl) for strings. Its declaration in C++ is:

typedef OLECHAR* BSTR;

MSDN defines BSTR as "A length-prefixed string used by Automation data manipulation functions."

BSTRs are UNICODE strings.

If you need to have strings in a VC++ COM object, then it has to be BSTR.

Vlad

>I haven't gotten into it in detail, but I have been told that the C++ functions that operate on BSTR data types assume NUL terminated strings. Have you found alternatives to this?