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lineSetCallData function (tapi.h)

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The lineSetCallData function sets the CallData member in LINECALLINFO. Depending on the service provider implementation, the CallData member can be propagated to all applications having handles to the call, including those on other machines (through the server), and can travel with the call when it is transferred.

Syntax

LONG lineSetCallData(
  HCALL  hCall,
  LPVOID lpCallData,
  DWORD  dwSize
);

Parameters

hCall

Handle to the call. The application must have OWNER privilege.

lpCallData

Address of the data to be copied to the CallData member in LINECALLINFO, replacing any existing data. For more information, see the call data topic.

dwSize

Number of bytes of data to be copied. A value of 0 causes any existing data to be removed.

Note  If lpCallData is a pointer to a string, the size must include the null terminator.
 

Return value

Returns a positive request identifier if the asynchronous operation starts; otherwise, the function returns one of these negative error values:

LINEERR_INVALCALLHANDLE, LINEERR_INVALCALLSTATE, LINEERR_INVALPARAM, LINEERR_INVALPOINTER, LINEERR_NOMEM, LINEERR_NOTOWNER, LINEERR_OPERATIONFAILED, LINEERR_OPERATIONUNAVAIL, LINEERR_RESOURCEUNAVAIL, LINEERR_UNINITIALIZED.

Requirements

Requirement Value
Target Platform Windows
Header tapi.h
Library Tapi32.lib
DLL Tapi32.dll

See also

LINECALLINFO

Supplementary Line Service Functions

TAPI 2.2 Reference Overview