问题
I'd like to write an outlook add-in that changes the color of the Outlook window when the user opens an e-mail that comes from a sender external to the company.
Can someone tell how to change the color of the outlook window? Also, will I need to use MAPI?
回答1:
As far as you're concerned, it is not possible.
Since 2007, the color of the Outlook UI is defined by the user's color preference (Blue, Silver, or Black, or in 2013: White, Grey, Dark Grey). There is no API provided to allow add-ins to change this setting, let alone on a per-window basis.
Hypothetically it is possible to inject code into the Outlook process and hijack the window painting methods, but this would require a huge amount of reverse-engineering skill on your part.
来源：https://stackoverflow.com/questions/13406306/is-it-possible-to-write-an-outlook-add-in-that-modifies-the-color-of-the-user-in