Create a new COM (OLE Automation) object and return a link to it. You can ONLY use this function as an argument of the #VAR command. Only #VAR understands how to store a link to a COM object. You'll then use this zMUD Variable to reference the COM object when calling the other COM functions.
#VAR Outlook %comcreate("Outlook.Application")
creates a link to a new Microsoft Outlook COM object and stores the reference in the @Outlook zMUD variable.