/// <summary>
/// Retrieves a feature from the device.
/// </summary>
/// <param name="device"></param>
/// <param name="code"></param>
/// <param name="datalen"></param>
/// <returns></returns>
/// <remarks></remarks>
public static HIDFeatureResult GetHIDFeature(IntPtr device, int code, int datalen = 16)
{
HIDFeatureResult GetHIDFeatureRet = default;
MemPtr mm = new MemPtr();
int i = code;
try
{
mm.AllocZero(datalen);
mm.ByteAt(0L) = (byte)i;
if (UsbLibHelpers.HidD_GetFeature(device, mm.Handle, (int)mm.Length))
{
GetHIDFeatureRet = new HIDFeatureResult(i, mm);
}
else
{
GetHIDFeatureRet = null;
}
mm.Free();
}
catch
{
mm.Free();
return(null);
}
return(GetHIDFeatureRet);
}
/// <summary>
/// Retrieves a feature from the device.
/// </summary>
/// <param name="device"></param>
/// <param name="code"></param>
/// <param name="datalen"></param>
/// <returns></returns>
/// <remarks></remarks>
public static HIDFeatureResult GetHIDFeature(HidDeviceInfo device, int code, int datalen = 16)
{
HIDFeatureResult GetHIDFeatureRet = default;
IntPtr hFile;
hFile = IO.CreateFile(device.DevicePath, IO.GENERIC_READ, IO.FILE_SHARE_READ | IO.FILE_SHARE_WRITE, IntPtr.Zero, IO.OPEN_EXISTING, IO.FILE_ATTRIBUTE_NORMAL, default);
if (hFile == IntPtr.Zero)
{
return(null);
}
GetHIDFeatureRet = GetHIDFeature(hFile, code, datalen);
User32.CloseHandle(hFile);
return(GetHIDFeatureRet);
}