Get symbols active in the chart window

[tuscan...@gmail.com]

I want to get all the symbols which are active in the chart window. I am using Amibroker COM object which doesn't seem to be a right way of doing it as sometimes the object of AmiBroker remains in the processes even after closing it. What all i want is

a symbol.

1) When user opens a new chart window (Required : A new symbol name to be added in the chart to send Add Req to the server.)

2) When user closes an existing chart window (Required : A symbol which is no longer needed to display in the chart window to send Delete Req to the server).

Is there any alternative for fetching the status of the symbols?