phoneGetStatusMessages

  • Article

This function returns which phone-state changes on the specified phone device generate a callback to the application.

LONG WINAPI phoneGetStatusMessages(
  HPHONE hPhone,
  LPDWORD lpdwPhoneStates,
  LPDWORD lpdwButtonModes,
  LPDWORD lpdwButtonStates 
);

Parameters

  • hPhone
    Handle to the open phone device to be monitored.
  • lpdwPhoneStates
    Pointer to a DWORD holding zero, one or more of the PHONESTATE constants. These flags specify the set of phone status changes and events for which the application can receive notification messages. Monitoring can be individually enabled and disabled for:
  • lpdwButtonModes
    Pointer to a DWORD containing flags that specify the set of phone-button modes for which the application can receive notification messages. This parameter uses zero, one or more of the PHONEBUTTONMODE constants.
  • lpdwButtonStates
    Pointer to a DWORD that contains flags specifying the set of phone button state changes for which the application can receive notification messages. This parameter uses zero, one or more of the PHONEBUTTONSTATE constants.

Return Values

Returns zero if the request succeeds or a negative error number if an error occurs. The following table shows the return values for this function.

Value Description
PHONEERR_INVALPHONEHANDLE The handle to the open phone device is invalid.
PHONEERR_NOMEM Not enough memory is available.
PHONEERR_INVALPOINTER A pointer is invalid.
PHONEERR_RESOURCEUNAVAIL The resources are unavailable.
PHONEERR_OPERATIONFAILED The operation failed.
PHONEERR_UNINITIALIZED A parameter is uninitialized.

Remarks

An application can use phoneGetStatusMessages to query the generation of the corresponding messages. Message generation can be controlled by phoneSetStatusMessages. All phone status messages are disabled by default.

Note   This function is for TAPI version 2.0 and later.

Requirements

OS Versions: Windows CE 3.0 and later.
Header: Tapi.h.
Link Library: Coredll.lib.

See Also

phoneGetDevCaps | phoneSetStatusMessages

 Last updated on Saturday, April 10, 2004

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