Hello Richard M,
Straight to your questions:
1) To programmatically show a tooltip you should set ShowEvent="FromCode", reference the tooltip and call its method show()
2) If you want not only to programmatically show but also to create dynamically a tooltip on the client you should use the RadToolTipManager's createToolTip method as shown in the demo below:
I hope that my reply is detailed enough and helpful, let me know how it goes.
the Telerik team
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