User`s guide

24 • Using PCIS-DDE With InTouch
3.3 Monitor the Status of an DDE Conversation
InTouch also supports a built-in topic name called IOStatus (DDEStatus in
versions prior to InTouch 7.0) that can be used to monitor the status of
specific DDE conversations. When using the built-in topic IOStatus to
monitor an I/O conversation, the item name is the actual Topic Name that
you want to monitor. Let's assume that WindowViewer (View) is
communicating with the PCIS-DDE server to a NuDAQ PCI-bus data
acquisition cards that has been defined in the PCIS-DDE with Module1 for
its topic name. The tagname definition is as the following figures: