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Extended TAPI Messages

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The following messages are used with Extended TAPI. Upon receiving a line message from the telephony service provider, your application should check the message parameters. Check dwParam1 to determine the type of message being received. Then check dwParam2 and dwParam3 to determine the specific details for that message type.

Message Description
LINE_CURRENTLINECHANGE Sent to the application every time the current line changes.
LINE_CURRENTSYSTEMCHANGE Sent to the application every time the current system changes.
LINE_EQUIPSTATECHANGE Sent to the application every time the equipment state changes.
LINE_GPRSCLASS Sent to the application every time the General Packet Radio Service (GPRS) class changes. Not implemented for CDMA.
LINE_GPRSREGISTERSTATE Sent to the application every time the registration state changes. Not implemented for CDMA.
LINE_RADIOPRESENCE Sent to the application every time the radio is inserted or removed.
LINE_REGISTERSTATE Sent to the application every time the registration state changes.
LINE_USSD Sent to the application every time the application receives a notification response to an Unstructured Supplementary Service Data (USSD) command. Not implemented for CDMA.

See Also

Extended TAPI

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