Public Overridable Function FindPort( _
   ByVal portid As String, _
   ByVal from As Boolean _
) As FrameworkElement

public virtual FrameworkElement FindPort( 
   string portid,
   bool from
)

Parameters

portid

This treats null as an empty string. The method returns the element whose Node.GetPortId value equals that string. If there is no such child element, it searches for an element whose Node.GetPortId value is the empty string. Finally, when failing to find a port with either the given name or the empty string, this method returns the root visual element for the node.

from

Return Value

Reference