COM: Returning IDispatch or NULL
Juan Carlos CORUÑA
jcc at ibdosnorte.com
Mon Sep 23 17:00:15 CEST 2002
I'm trying to develop a COM Server in python, that has a method that
returns an IDispatch object but sometimes it must return nothing. See
the following example programmed in C/SIDE (Microsoft Navision
otherCOMServer := COMServer.returnOtherCOMServer();
IF ISCLEAR(otherCOMServer) THEN MESSAGE('otherCOMServer is clear');
Definition of ISCLEAR (extracted from MS Navision help):
The return value is TRUE if:
-the automation variable has not been created. See CREATE.
-the automation variable has been cleared. See CLEAR.
-the automation variable has been assigned NULL by an automation
I thing that in this case I must assign NULL to the otherCOMServer
variable in order to keep the otherCOMServer variable CLEARED.
What must I return from "COMServer.returnOtherCOMServer()" method to
I have tried:
but without success. The environment responds "data type not
I know that other COM servers developed by Microsoft Navision works
Thanks in advance.
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