Try setting a very small MinimumNodeSize value.

I hope that helps,
Stoyan

In what way did you fail? Note that a zero size is the default, and the control interprets it as a MeasureUnit -indepent value of couple of millimeters. You will have to set it to something like 0.1 x 0.1 to have any effect.

If this is about the FreeLine class we discussed earlier, you could just override its AllowCreate method to disregard MinimumSize:

protected override bool AllowCreate(Point current, InteractionState ist)
{
	return true;
} 

I hope that helps,
Stoyan

Hi,

You should be able to draw a FreeLine from another FreeLine if the latter does not show selection frame. Make sure SelectAfterCreate is disabled and ModificationStart is not set to AutoHandles. To prevent interactive selection completely, set e.Cancel = true from the NodeSelecting handler.

To disable drawing standard DiagramLinks from a node, you will have to create a custom behavior class and assign its instance to the CustomBehavior property:

class MyBehavior : DrawNodesBehavior
{
	public MyBehavior(Diagram diagram) : base(diagram) {}

	protected override DiagramNode CreateNode()
	{
		return new FreeLine();
	}
}

diagram.CustomBehavior = new MyBehavior(diagram); 

I hope that helps,
Stoyan