How to refresh only one control ?

[zencoder]

I am trying to display DOM on chart as an indicator. In OnMarketDepth I must use ChartControl.Refresh() to refresh displaying in a textbox DOM values which is chachged more frequently than bar updates.

But redrawing all chart dozen times per second hungs up calculation (processor usage come up to 90% and more).

Is any other method of refreshing only single control (only one textbox) ? If so - can anybody provide me right code or a link with description how can I do this?

Thanks.