How do you prevent the SIP from ever showing in Windows Mobile 6.5

We have a full screen app in WM6.5, and when a message box pops up, ab开发者_StackOverflow中文版out 1/2 a second later, so does the sip panel.

Is there a way to prevent it from popping up.

Right now we have a timer that hides it, but this is a hack, and we'd like a better solution.

Any ideas?

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I used a timer, then called the API's to close the SIP