Hello Richard M,
The RadToolTipManager control is most pften used to load the content on demand, This can be done in two manners:
1) By using AJAX - in this case you handle teh OnAjaxUpdate event and add the desired content to the internal update panel as shown in the demo below:
2) By using a WebService - in this case you return the desired content as a string as shown below:
If the content is simple you can set it to the target's ToolTip/Title/AlternateText property and the manager will automatically get the content of teh property and it will display it in a RadToolTip.
On a side note, when you install RadControls, our online examples projects are automatically installed on your computer and you can not only examine their full source code, but also extend them further in order to meet your requirements.
You can open the demos from here:
Start\Programs\Telerik\RadControls for ASPNET AJAX\Open Sample WebSite In VisualStudio
The actual location on your hard disk is the following one:
C:\Program Files\Telerik\RadControls for ASPNET AJAX \Live Demos
And finally, in case you encounter a problem, you should open a new support ticket and send a small reproduction demo with your exact setup and detailed explanations of the actual and the desired behavior.
I hope that my explanations and the provided information is helpful.
All the best,
the Telerik team
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