adding and using custom item in TRectangle

Using the FM Style editor I have added another TTMSFMXHTMLText control into the itemcenterrectangle Trectangle.
In its property BindingName I have added some name like item_myid.

I can access this custom item control text on ItemClick like this:
 
For example showMessageAItem.Shape.Binding[' item_myid '] );

But I can not right to it when i add item to list using TTMSFMXTableViewItem.
I have tried similar code found in FMX_TMSTableView but not able to do it.

How can i add custom Control and use its binding name to read write.

Thanks,
Avanish

What exactly do you mean with I can not right to it when i add item? Can you explain this with some code?


Kind Regards, 

Pieter