Returns control to Cadcorp SIS Desktop from a Visual Basic program. When the user invokes a registered command, they are locked out of SIS Desktop commands until this routine is called. This does not terminate the link.
Public Function ReleaseNA()
Note: When the user selects a GisLink command, previously added using AddCommand, the SIS Desktop application will not respond to mouse clicks or keyboard presses until this method or the Release method is called. For example use ReleaseNA after the DrawList method to prevent the display from being refreshed.