Stuff

void HIDDevice::PrepareForOverlappedTransfer(HIDDevice & device, PSP_DEVICE_INTERFACE_DETAIL_DATA & detailData)
{
	// Get a handle to the device for the overlapped ReadFiles.
	device.m_read_handle = CreateFile (detailData->DevicePath, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE,
		(LPSECURITY_ATTRIBUTES)NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL);

	// Get an event object for the overlapped structure.
	if (device.m_event_object == 0)
	{
		wstring empty = _T("");
		device.m_event_object = CreateEvent (NULL, TRUE, TRUE, empty.c_str());
		device.m_hid_overlapped.hEvent = device.m_event_object;
		device.m_hid_overlapped.Offset = 0;
		device.m_hid_overlapped.OffsetHigh = 0;
	}
}

void HIDDevice::GetDeviceCapabilities(HIDDevice & device)
{
	//Get the Capabilities structure for the device.
	PHIDP_PREPARSED_DATA PreparsedData;

	HidD_GetPreparsedData(device.m_device_handle, &PreparsedData);
	HidP_GetCaps(PreparsedData, &device.m_capabilities);
	HidD_FreePreparsedData(PreparsedData);
}

bool HIDDevice::WriteOutputReport(char out_bytes[])
{
	char	output_report[256];
	DWORD	bytes_written = 0;
	ULONG	result;

	memcpy(output_report, out_bytes, 256);

	if (m_write_handle != INVALID_HANDLE_VALUE)
		result = WriteFile(m_write_handle, output_report, m_capabilities.OutputReportByteLength, &bytes_written, NULL);

	if (!result)
	{ 
		return false; // If we can't write to the device, we're not really connected
	} else {
		return true;
	}

}

//void HIDDevice::RegisterForDeviceNotifications(HIDDevice & device)
//{
//
//	// Request to receive messages when a device is attached or removed.
//	// Also see WM_DEVICECHANGE in BEGIN_MESSAGE_MAP(CUsbhidiocDlg, CDialog).
//
//	DEV_BROADCAST_DEVICEINTERFACE DevBroadcastDeviceInterface;
//	HDEVNOTIFY DeviceNotificationHandle;
//
//	DevBroadcastDeviceInterface.dbcc_size = sizeof(DevBroadcastDeviceInterface);
//	DevBroadcastDeviceInterface.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
//	DevBroadcastDeviceInterface.dbcc_classguid = HidGuid;
//
//	DeviceNotificationHandle =
//		RegisterDeviceNotification(m_hWnd, &DevBroadcastDeviceInterface, DEVICE_NOTIFY_WINDOW_HANDLE);
//}