Use WinSock to search for Bluetooth devices)

You can use the following components to create a query to search for a range of remote Bluetooth devices:

• WsaquerysetStruct
• WsalookupservicebeginFunction
• WsalookupservicenextFunction
• WsalookupserviceendFunction

Note: For clarity, the error handling is ignored. Search and return the remote device address

1. Provides the Winsock version and detailed implementation data to initialize the caller application. You can callWsastartupFunction to obtain the data.

Wsadata WSD; Wsastartup (makeword (1, 0), & WSD );

1. Create and initializeWsaquerysetVariables are used to specify search parameters and setDwnamespaceThe Member isNs_bthThe limit is to query Bluetooth devices.

Wsaqueryset wsaq; Zeromemory (& wsaq, sizeof (wsaq )); Wsaq. dwsize = sizeof (wsaq ); Wsaq. dwnamespace = ns_bth; Wsaq. lpcsabuffer = NULL;

1. CallWsalookupservicebeginFunction to execute a query.

Int iret = wsalookupservicebegin (& wsaq, lup_containers, & hlookup ); SetLup_containersAssigned DwflagsParameter, start SDP to search for the bluetooth device. Note: Set DwflagsIf the parameter is set to zero, a service search is executed. Wsalookupservicebegin The function returns a handle HlookupParameter.

1. To enumerate calls in the previous stepWsalookupservicebeginYou must useWsalookupservicenexFunction. The function returns a query result pointingWsaquerysetAnd the body.
   1. SetWsaquerysetStruct to storeWsalookupservicenextThe device data returned by the function.

Char Buf [4096]; Lpwsaqueryset pwsaresults = (lpwsaqueryset) BUF; Zeromemory (pwsaresults, sizeof (wsaqueryset )); Pwsaresults-> dwsize = sizeof (wsaqueryset ); Pwsaresults-> dwnamespace = ns_bth; Pwsaresults-> lpblob = NULL;

1. CallWsalookupservicenextAnd setWsalookupservicebeginReturnedHlookupThe parameter is passed to it. To improve performanceWsalookupservicebegin Only the device address is returned and stored in the memory. To return the device name and addressLup_return_name | lup_return_addrAssignedDwflagsParameters.

DWORD dwsize = sizeof (BUF ); Int iret = wsalookupservicenext (hlookup, lup_return_name | lup_return_addr, & dwsize, pwsaresults) It can be called cyclically. WsalookupservicenextTo enumerate all devices.

1. CallWsalookupserviceendFunction to end the device search. This function will be releasedWsalookupservicebeginThe created lookup handle.

Wsalookupserviceend (hlookup );

1. To end the use of the Winsock service, callWsacleanupFunction. InProgramFor each successfully calledWsastartupMust be called accordinglyWsacleanup.

The following code example performs a device inquiry displays the device name in a user interface. The followingCodeA device query is executed and the device name is displayed on the user interface. //------------------------------------------------------------------------ // Function: performinquiry // Purpose: performs a device inquiry displays the device name in a user interface. //------------------------------------------------------------------------ # Deprecision max_name 248 Static bool initialize minquiry () { Wsaqueryset wsaq; Handle hlookup; Union { Char Buf [5000]; Double _ unused; // Ensure proper alignment }; Lpwsaqueryset pwsaresults = (lpwsaqueryset) BUF; DWORD dwsize = sizeof (BUF ); Bool bhavename; Zeromemory (& wsaq, sizeof (wsaq )); Wsaq. dwsize = sizeof (wsaq ); Wsaq. dwnamespace = ns_bth; Wsaq. lpcsabuffer = NULL; If (error_success! = Wsalookupservicebegin (& wsaq, lup_containers, & hlookup )) { Wprintf (L "wsalookupservicebegin failed % d \ r \ n", getlasterror ()); Return false; } Zeromemory (pwsaresults, sizeof (wsaqueryset )); Pwsaresults-> dwsize = sizeof (wsaqueryset ); Pwsaresults-> dwnamespace = ns_bth; Pwsaresults-> lpblob = NULL; While (error_success = wsalookupservicenext (hlookup, lup_return_name | lup_return_addr, & dwsize, pwsaresults )) { Assert (pwsaresults-> dwnumberofcsaddrs = 1 ); Bt_addr B = (sockaddr_bth *) pwsaresults-> lpcsabuffer-> remoteaddr. lpsockaddr)-> btaddr; Bhavename = pwsaresults-> lpszserviceinstancename & * (pwsaresults-> lpszserviceinstancename ); Wprintf (L "% S % 04x % 08x % s \ n", bhavename? Pwsaresults-> lpszserviceinstancename: l "", Bhavename? L "(": l "", get_nap (B), get_sap (B), bhavename? L ")": l ""); } Wsalookupserviceend (hlookup ); Return true; }

from : http://blog.csdn.net/jdcb2001/archive/2006/06/21/819643.aspx