public Polyline TrackVector(
	Color color,
	double width,
	TrackDelegate trackDelegate
)

Public Function TrackVector ( _
	color As Color, _
	width As Double, _
	trackDelegate As TrackDelegate _
) As Polyline

Return Value

This method returns a user-clicked vector on the map, using the specified line color and width while tracking. A vector is a special case of a Polyline with exactly two points, used only in ArcGIS Explorer during tracking operations (there is no vector geometry type). The TrackDelegate allows mouse moves and tracking cancellation to be identified. This overload allows the same TrackDelegate method to be called from both this synchronous method and also the asynchronous MapDisplay.BeginTrackVector(TrackDelegate) method.

This method will block the user interface (UI) thread until the user has completed tracking the vector. The method can be cancelled if the ESC key is pressed after the method has been called or the CancelTracking()()() method is called; in this case the method will return nullNothingnullptra null reference (Nothing in Visual Basic).

Alternatively you may wish to try the asynchronous alternative BeginTrackVector(TrackDelegate), or the synchronous TrackVector()()() overload.