IOCTL_BLUETOOTH_GET_RFCOMM_CHANNEL (Compact 2013)

3/26/2014

This I/O control message determines the RFCOMM (Serial Cable Emulation Protocol) channel assigned when the server channel is auto-bound. Send this message with DeviceIoControl.

Syntax

BOOL DeviceIoControl(
    HANDLE hDevice,           // handle to the device
    DWORD dwIoControlCode,    // use IOCTL_BLUETOOTH_GET_RFCOMM_DEVICE
    LPVOID lpInBuffer,        // pointer to input buffer
    DWORD nInBufferSize,      // input buffer size
    LPVOID lpOutBuffer,       // pointer to output buffer
    DWORD nOutBufferSize,     // output buffer size
    LPDWORD lpBytesReturned,  // number of bytes returned
    OVERLAPPED lpOverlapped   // pointer to OVERLAPPED structure
);

Parameters

• hDevice
  [in] Handle to the device.

• dwIoControlCode
  [in] Control code for the operation. Use IOCTL_BLUETOOTH_GET_RFCOMM_DEVICE for this operation.

• lpInBuffer
  [in] Set to NULL.

• nInBufferSize
  [in] Set to zero

• lpOutBuffer
  [out] Pointer to a DWORD that receives the channel number.

• nOutBufferSize
  [out] Set to sizeof(DWORD).

• lpBytesReturned
  [in][out] set to NULL.

• lpOverlapped
  [in] Ignored, set to NULL.

Remarks

The server channel is auto-bound when the virtual COM port is registered with PORTEMUPortParams.channel = RFCOMM_CHANNEL_MULTIPLE.

Requirements

See Also

Reference

Bluetooth Application Development IOCTLs
PORTEMUPortParams