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I have to retrograde an ESRI add-in application from ArcGIS 10.1 to ArcGIS 9.3.1.

My challenge is how in the drop down list can I add base tool control( will be shown as icons inside the drop down list : red and green icons )enter image description here,

In ArcGIS 9.3.1 is easier to create a drop down list containing text:

enter image description here

By default a drop down list can't contain image , how can I overcome that?

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After re-reading your question... I am curious as to how the dropdown in the first screenshot was implemented. Is that actually a dropdown (combobox) or a menu? – blah238 Mar 19 '13 at 2:40
In VS 2010 add-in solution right click on the solution and add ArcGIS Add-in component and then choose Tool Palette .At this stage you will get a tool palette that u can add tools on it or u can edit the esri add-in xml file by adding <ToolPalette> <Items> <Tool.... – Amo Mar 19 '13 at 16:18

If you are developing out of visual studio try using Listview control instead of a listbox. You can use the ListViewItem.ImageKey Property.

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Thanks this has resolved the challenge and I was even able to have icon and text label associated with the icon – Amo Mar 19 '13 at 16:14
@Amo I think you should Accept this answer by clicking the green tick. – PolyGeo May 11 '15 at 10:12

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