Hi Matt ,
Sorry for the delay. If you want to show the ports without the symbol, then you have to set the node's FillStyle.Color and LineStyle.LineColor to Transparent. Please refer to the following code snippet.
Dim con As ConnectionPoint = New ConnectionPoint()
con.VisualType = PortVisualType.Custom
Dim m_rect As Syncfusion.Windows.Forms.Diagram.Rectangle = New Syncfusion.Windows.Forms.Diagram.Rectangle(120, 30, 60, 30)
m_rect.Ports.Add(con)
Me.diagram1.Model.AppendChild(m_rect)
m_rect.FillStyle.Color = Color.Transparent
m_rect.LineStyle.LineColor = Color.Transparent
Please refer to the attached sample that illustrates this.
http://websamples.syncfusion.com/samples/Diagram.Windows/F72007/main.htmPlease let me know if you have any questions.
Regards,
Nagaraj