[DllImport("coredll.dll", EntryPoint="CeGetUserNotificationHandles", SetLastError=true)]  

private static extern bool CeGetUserNotificationHandles(IntPtr[] rghNotifications, uint cHandles, ref uint pcHandlesNeeded);

Declare Function CeGetUserNotificationHandles Lib "coredll" (ByVal rghNotifications As IntPtr(), ByVal chandles As UInt32, ByRef pcHandlesNeeded As UInt32) As Boolean