PC MAPI: MAPILogon Can Only Be Called Once from an Application (130703)


The information in this article applies to:

  • Microsoft Mail for PC Networks 3.0
  • Microsoft Mail for PC Networks 3.2
This article was previously published under Q130703

SUMMARY

MAPILogon is a function available with the Simple Messaging Application Program Interface (MAPI), included with Microsoft Mail for PC Networks. MAPILogon is used to validate and create (or increment) the session handle associated with any Microsoft Mail, Microsoft Schedule+, Microsoft Electronic Forms, or Simple MAPI application.

MORE INFORMATION

MAPILogon, once successfully returned, cannot be called again from the same thread of execution, for example, to force the download of new messages during a session. This means that an application making a call to MAPILogon, will not be able to successfully call it again from the same application. If you attempt to make a second call to MAPILogon, you will get the following error:
Error 8, MAPI_E_TOO_MANY_SESSIONS
Before you make a second call to MAPILogon, the caller must first call MAPILogout to release the session handle being held by the application.
Modification Type:MajorLast Reviewed:10/31/1999
Keywords:KB130703
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