This article was previously published under Q171723
The ADSI help files do not specify the header or library files that youneed to build ADSI applications in Visual C or Visual C++.
If you are building new code (or using the code snippets in ADSI help), youmust include activeds.h, which will pull in the other ADSI header files.The ADSI APIs are Unicode so you should also define UNICODE and _UNICODEbefore including any system headers (for example, windows.h). If you areusing the LDAP provider's OLE DB support you will also need to includeoledb.h.
When you link your code you should add Adsiid.lib and Activeds.lib to yourobject/library modules settings. If you are using the LDAP provider's OLEDB support you will also need to add Oledb.lib.
An error message of the following type is created when Adsiid.lib is missing from the link libraries:
YOUR_FILE.obj : error LNK2001: unresolved external symbol _IID_IADs*
An error message of the following type is created when Activeds.lib is missing from the link libraries: