Opens a dynamic data exchange (DDE) channel to another application, and returns the channel number.
Syntax
expression.DDEInitiate(App, Topic)
expression Optional. An expression that returns an Application object.
App Required String. The name of the application.
Topic Required String. The name of a DDE topic — for example, the name of an open document — recognized by the application to which you're opening a channel.
Remarks
If it's successful, the DDEInitiate method returns the number of the open channel. All subsequent DDE functions use this number to specify the channel.