lineGetProviderList

The lineGetProviderList function returns a list of service providers currently installed in the telephony system.

LONG WINAPI lineGetProviderList(
  DWORD dwAPIVersion,                
  LPLINEPROVIDERLIST lpProviderList  
);

Parameters

dwAPIVersion

The highest version of TAPI supported by the application (not necessarily the value negotiated by lineNegotiateAPIVersion on some particular line device).

lpProviderList

A pointer to a memory location where TAPI can return a LINEPROVIDERLIST structure. Prior to calling lineGetProviderList, the application should set the dwTotalSize member of this structure to indicate the amount of memory available to TAPI for returning information.

Return Values

Returns zero if the request succeeds or a negative error number if an error occurs. Possible return values are:

LINEERR_INCOMPATIBLEAPIVERSION, LINEERR_NOMEM, LINEERR_INIFILECORRUPT, LINEERR_OPERATIONFAILED, LINEERR_INVALPOINTER, LINEERR_STRUCTURETOOSMALL.

Remarks

Although this is a new function that older applications would not be expected to call, for backward compatibility they should not be prevented from doing so. The function works the same way for all applications.

Requirements

  Windows NT/2000: Requires Windows NT 4.0 SP3 or later.
  Windows 95/98: Requires Windows 95 or later.
  Version: Requires TAPI 1.4 or later.
  Header: Declared in Tapi.h.
  Library: Use Tapi32.lib.
  Unicode: Implemented as Unicode and ANSI versions on all platforms.

See Also

TAPI 2.2 Reference Overview, Supplementary Line Service Functions, lineNegotiateAPIVersion, LINEPROVIDERLIST