VSTO - Outlook 2007 How do I change the icon of a YesNo column in a folder view?

I have a YesNo column in a folder, and I added it to the folder view; it appears as a checked or unchecked checkbox. I've been asked to replace it with a green or red circle. Is this possible?

Thank you for your t开发者_开发知识库ime.

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Hi this is not possible with the OOM, I think you would need to do some WinApi to swap icons.