Bluetooth Initialization query

Hey all

Just have a question regarding bluetooth setup in C#, I need to call the following function and so created the corresponding template:

Code:

---

INT WSALookupServiceBegin(
  __in  LPWSAQUERYSET lpqsRestrictions,
  __in  DWORD dwControlFlags,
  __out  LPHANDLE lphLookup
);

[DllImport(WINSOCK_DLL, CharSet = CharSet.Auto, SetLastError=true)]
                public static extern int WSALookupServiceBegin(WSAQUERYSET querySet, int flags, ref int lookupHandle);

---

and to be able to supply the LPWSAQUERYSET parameter I created the following struct:

Code:

---

struct WSAQUERYSET
    {
        public Int32 dwSize;
        public String szServiceInstanceName;
        public IntPtr lpServiceClassId;
        public IntPtr lpVersion;
        public String lpszComment;
        public Int32 dwNameSpace;
        public IntPtr lpNSProviderId;
        public String lpszContext;
        public Int32 dwNumberOfProtocols;
        public IntPtr lpafpProtocols;
        public String lpszQueryString;
        public Int32 dwNumberOfCsAddrs;
        public IntPtr lpcsaBuffer;
        public Int32 dwOutputFlags;
        public IntPtr Blob;
    }

---

using this I run the following code:

Code:

---

/// <summary>
        /// Search for devices in the area
        /// </summary>
        public void scan()
        {
            int LUP_CONTAINERS = 16;
           
            //get version 2.2
            ushort version = 0;
            version = 2 << 7;
            version += 2;

            byte [] data = new byte [15];
            int result = SafeNativeMethods.WSAStartup(version, data);  // returns 0
           
            int param = 0;
            WSAQUERYSET q = new WSAQUERYSET();
            int iRet = SafeNativeMethods.WSALookupServiceBegin(q,LUP_CONTAINERS,ref param); // NOT SUPPORTED EXCEPTION
            int last_error = SafeNativeMethods.WSAGetLastError();
           
            // do other stuff....

        }

---

As mentioned in the code I get a NotSupportedException when callling the WSALookupServiceBegin method which I suspect is due to the strings in the struct I created (as it disappears when I remove them but gives a different problem). How is my definition of WSAQUERYSET not correct?

actually if any mods wanna move this to the C# forum...

hi,

Ihave a question regarding bluetooth setup in C#, I need to call the following function and so created the corresponding template. pl. send a nice message.


thanks for message



regards,
phe9oxis,
http://www.guidebuddha.com