An application is setup to send email using MSMAPI. The program's been working fine for months. All of a sudden, it's generating OLE Dispatch error. Am I right that MSMAPI uses MSMAPI32.OCX file? If so, I think something's wrong with this control itself or with registry info. about this control.

Now can I solve this? I there a way to "unregister" this OCX and re-register this or another version of this control?