Properties 
Methods 
Physical properties of a vertex for problems of AC (timeharmonic) conduction.
The LabelVertexEC object represents physical data applicable to the vertex label for AC (timeharmonic) conduction problems.
When you need to set or modify some physical parameters for the vertex label, you have to get the LabelVertexEC object using the Content property of the Label object, modify the LabelVertexEC object using its properties and then put it back in the Label object assigning your LabelVertexEC to the Content property of your Label object.
The LabelVertexEC is derived from the LabelVertex object. It inherits methods and properties from its base class and provides two additional property for manipulating with value's phase. Here the LabelVertex's properties take the following meaning:
DirichletEx property
 Sets and gets the known amplitude (peak) value of the electric potential U_{0} at the vertex.

DirichletPhaseEx property
as Variant  Sets and gets the known phase value of electric potential A_{0} at the vertex in degree.
The value could be either a number or a formula. 
LoadingEx property
as Variant  Sets and gets the known amplitude (peak) value of the linear electric current at the vertex.
The value could be either a number or a formula. 
LoadingPhaseEx property
as Variant  Sets and gets the known phase value of the linear electric current at the vertex in degrees.
The value could be either a number or a formula. 
A point source in the XYplane corresponds to a linear current in the outofplane direction. In the axisymmetric case the point source represents the current in a thin ring around the axis of symmetry.