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Bluetooth uses the BLOB structure to pass or receive transport-specific data to the WSAQUERYSET structure during calls to the WSASetService or WSALookupService* functions.
For use with Bluetooth and the WSASetService function, the BLOB structure members are required to have the following settings:
- The cbsize member must be set to the size of the BTH_SET_SERVICE structure used in the pBlobData member, in bytes.
- The pBlobData member must be a pointer to a BTH_SET_SERVICE structure.
For use with Bluetooth and WSALookupServiceBegin for Device Inquiry, use the following settings:
- The cbsize member must be set to the size of the BTH_QUERY_DEVICE structure used in the pBlobData member, in bytes.
- The pBlobData member must be a pointer to a BTH_QUERY_DEVICE structure.
For use with Bluetooth and WSALookupServiceBegin for Service Discovery, use the following settings:
- The cbsize member must be set to the size of the BTH_QUERY_SERVICE structure used in the pBlobData member, in bytes.
- The pBlobData member must be a pointer to a BTH_QUERY_SERVICE structure.
For more information, see the Remarks section in the BTH_SET_SERVICE structure reference page.