Add a custom button to titlebar in Windows Mobile 5

Is there a way to add a button to the title bar in windows mobile 5? (Next to the X or OK button.)

I have an app that locks the users out of the start button, so I need to create an al开发者_Python百科ternate way of launching the help file.

Failing the title bar, I will look for a way to customize what a hardware button does.

I am using C#.

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Unfortunately no. That bar (which is actually a separate app) is extensible only by the OEM.