Identifies the button function used clicked as defined in ctButtonFunction

Action that user took in associated dialog box.

Properties which values have beed changed during the event.

All properties that have Allow Scripting set. Values of properties can be changed.

Property having ButtonFunction defined as Button function. Do not try to change value of associated custom property by using this. Instead, values should be changed by using Properties.

Currently selected project in Properties. In order to change selected project set desired project to this property.

The document (IModelDoc2) which we are currently targetting.