P

FamilyInstancePlacingArgs.TooltipMessage

Description:
The message to be shown via tooltip

public string TooltipMessage { get; set; }

Public Property TooltipMessage As String
Get
Set

public:
property String^ TooltipMessage {
	String^ get ();
	void set (String^ value);
}

Autodesk.Revit.Exceptions.ArgumentNullException

When setting this property: A non-optional argument was null