FYI: I also had some problems with the MAPI class - re "Appropriate License for this class not found"

Here are some additional notes excert from my code that may be of help to others:

------------------------
in the init:
------------------------

with this

* ---INSTANTIATE MAPI OCX AND CHECK THAT IT IS AVAILABLE---
*
* NB: We trap any instantiation errors in the error() method
* ( .p_ole_instantiation_error gets set to .T.)
*
*
* NOTES:
*
* 1. This container is DELIBERATELY empty, and then the
* .Ole_mapi_session, and .Ole_mapi_messages objects
* are added to it here in the init via .newobject()
*
* It is done this way - because if the MAPI controls
* were instead dropped into the container at design time,
* and the MAPI32.OCX did not exist on the users PC, we
* would get an error - which cannot be trapped for in
* the .error() event.
* ( and we could not then run the this.m_register_ocx() )
*
* 2. When we add the .Ole_mapi_session, and .Ole_mapi_messages objects
* we do so from the objects that ALREADY exist in the SYMAPI.VCX
*
* i.e. rather than trying to add them (as some articles suggest) via:
* this.Ole_mapi_session = newobject("MSMAPI.MAPISession.1")
* this.Ole_mapi_messages = newobject("MSMAPI.MAPIMessages.1")
*
* (where .Ole_mapi_session and .Ole_mapi_messages are created as blank
* properties in the class at design time)
*
* Although the newobject("MSMAPI.MAPISession.1") etc works OK on a
* Developers PC - it may not work OK on Clients PCs at runtime, as
* you may get an error message:
* "Appropriate License for this class not found"
*
* This is a Bug in VFP 6
*
* For more details See MSDN article:
* 192693 - "BUG: License Error with ActiveX Control Added at Run-Time"
*

* ---Instantiate the MAPI OLE objects---
.NewObject("Ole_mapi_session","Ole_mapi_session","SYMAPI")
.NewObject("Ole_mapi_messages","Ole_mapi_messages","SYMAPI")

* ---Check for any instantiation errors---
if .p_ole_instantiation_error && gets set in .error
* There was a problem trying to instantiate the MAPI controls.

* ---Re-copy necessary files, and re register them---
.m_register_ocx()

* ---Try again to instantiate the MAPI OLE objects---
* NB: We trap any instantiation errors in the error() method
.p_ole_instantiation_error = .F. && reset the Error flag
*
.NewObject("Ole_mapi_session","Ole_mapi_session","SYMAPI")
.NewObject("Ole_mapi_messages","Ole_mapi_messages","SYMAPI")

* ---Check again for problems---
if .p_ole_instantiation_error && gets set in .error
* There was STILL a problem trying to instantiate the MAPI controls.
* i.e. the m_register_ocx() did not resolve the problem
* - Give up.
.enabled = .F.
endif

endif

endwith && this


------------------------
in the error event:
------------------------

* ---If we encounter an error - then show why, disable MAPI etc---
LPARAMETERS nError, cMethod, nLine

* ---PROCESS ACCORDING TO ERROR TYPE---
with this

do case

case nError = 1426 .and. "CLASS NOT REGISTERED" $ upper(message())
*
* 1426 = Ole Error : "Class not registered"
*
* Happens when trying to add the mapi objects in the init.
* and the Mapi control hasnt been registered on this PC
*
* NB do NOT Display an error message
*
* The class will try and be registered via
* .m_register_ocx() in the .init
*
.p_ole_instantiation_error = .T.
* NB do NOT set .enabled = .F. here - it gets done in the init
* (gets re-enabled later if registration is sucessful)

etc