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Make sure the widget library is using a channel
int PtChannelCreate( void );
In QNX 4, this function simply returns 1.
In QNX Neutrino, this function makes sure that the widget library is using a channel (rather than realtime signals) for notification. It returns the channel number (or -1 on failure).
There's no such thing as a channel in QNX 4, so this function simply returns 1.
In QNX Neutrino, this function returns the channel number, or -1 on failure.