2.2.5.2 TAPI32_MSG
The TAPI32_MSG packet is used in the following situations:
Requests from the client to the server to specify a function type.
Acknowledgments from the server to the client to specify a return value.
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Req_Func/Ack_ReturnValue |
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Reserved1 |
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PARAMETERS FOR REQUEST (52 bytes) |
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VarData (variable) |
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Req_Func/Ack_ReturnValue (4 bytes): An unsigned 32-bit integer. The function type requested by the client from the server.
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The return value from the server request. The following table lists the possible return values.
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Value
Meaning
TAPI_SUCCESS
0x00000000
The requested function is valid.
TAPIERR_INVALRPCCONTEXT
0x0000F101
The RPC request is made with an invalid handle.
LINEERR_INVALPARAM
0x80000032
A parameter or packet that a parameter points to contains invalid information.
LINEERR_OPERATIONUNAVAIL
0x80000049
The operation is not available.
LINEERR_REINIT
0x80000052
The application attempted to initialize TAPI twice.
Reserved1 (4 bytes): An unsigned 32-bit integer. MUST be set to zero when sent and MUST be ignored on receipt.
PARAMETERS FOR REQUEST (52 bytes): An unsigned 32-bit integer. The parameters for the request. The size of the Params array MUST be specified by MAX_TAPI_FUNC_ARGS, which has a value of 13.
VarData (variable): Any variable length data. This field is dependent on packet usage.
This packet serves as a template for the Request Packets.