Thank you for writing.
1) You should handle RadDropDownList's VisualListItemFormatting event and set ToolTipText for each VisualItem to desired text:
sender, VisualItemFormattingEventArgs args)
args.VisualItem.ToolTipText = args.VisualItem.Text;
Please refer to the attached project that demonstrates how to show tooltips for RadDropDownList
2) I was not able to reproduce the described issue with the arrow keys navigation in the auto suggest list with the attached project.
3) You should inherit AutoCompleteAppendHelper
and override its DefaultCompare
function to return Contains
instead of default StartWith
Please refer to the attached project that demonstrates this functionality.
I hope this helps.
the Telerik team
Q2’11 SP1 of RadControls for WinForms is available for download (see what's new); also available is the Q3'11 Roadmap for Telerik Windows Forms controls.