constants ViewOperationEnum
The ViewOperationEnum type specifies operations that could start or end. The ViewStartChanging / ViewEndChanging events notify your application that an operation starts or ends.  The ViewOperationEnum type supports the following values:

NameValueDescription
exSplitViewChange1 The user splits/resizes the view into multiple views.
exResizeCascadeColumn2 The user resizes the cascade column.
exSelectionChange3 The view selection is changing.
exDataSourceChange4 The control's Data source is changing.
exLayoutChange5 The view layout is changing.
exShowContextMenu20 Occurs when the control is about to display the object's context menu.
exExecuteContextMenu21 Occurs when the control is about to execute a command from the object's context menu.