Hi,
In short I want to create a list of boxes with different properties(shape,color...etc). When I browse the list I want flowchart to show 1 box with the coresponding properties.

How can use a deleted box reference?

For example:
Box box = _flowChart.CreateBox(....);
_flowChart.DeleteObject(box);
_flowChart.Add(box);
throws null ref exception in flowchart at draw.

Box box = _flowChart.CreateBox(....);
_flowChart.DeleteObject(box);
newB = new Box(box);  //throws null ref

I think something modifies the box when DeleteObject is called. I could serialize/deserialize the object but are there other options?

Also - each box has a "setReference(int refId,IPersists obj)" wich I could not find in documentation. what does it do?

Tks

"Why do you want to reuse a deleted box - can't you keep the box around and set it Visible = true/false according to whether it's needed or not?"

I could use Visible...but for 100+ boxes it would mean that I have on flowchart 99 boxes hiden and 1 box visible at the same position instead of 1 box on flowchart and 99 in a list. I don't know if this won't generate problems(I think the real number will be more than 30 less than 500 depending on the user). Other than this I would prefer working with Visible because it's easier.

Tks.

For now it works but I have another problem with serialization....flowchart objects are not serializable.... Now I need to save that list of objects on disc an load the nodes for usage when designing a diagram on another flowchart...so I can think of 2 options:
1. I serialize the first flowchart with all nodes and keep on my list only the id of a node....deserialize after and take the data from flowchart by id from the list
2. Save in the list using reflection all the properties of a node so i can change a new node by using them...and serialize the list

Are there other options to serialize(xml or binary) data without flowchart?

Ok...I've serialized that hidden flowchart(1)....but now I have a box in this flowchart(1) that I want to put in another flowchart(2).
If I use flowchart2.Add(new Box(flowchart1_box))
the boxes collection in flowchart2 show that a box has been added but no box apears on the screen.

How can I do this?

Tks.

This was my mistake...I forgot visible was set to false. Thanks.