public HidCapabilities GetCapabilities(SafeFileHandle handle)
{
if (handle == null)
{
throw new ArgumentNullException($"{nameof(handle)} is null");
}
IntPtr preparsedData = IntPtr.Zero;
HidCapabilities capabilities = new HidCapabilities();
var preParseResult = NativeMethods.HidD_GetPreparsedData(handle, ref preparsedData);
if (!preParseResult)
{
throw new GetHidCapabilitiesException($"Could not get pre-parsed data by this {nameof(handle)}: {handle}");
}
bool isGetCaps = false;
//HIDP_CAPS caps = new HIDP_CAPS();
using (SafePreParsedDataHandle preParsedDataHandle = new SafePreParsedDataHandle(preparsedData, this))
{
var getCapResult = NativeMethods.HidP_GetCaps(preParsedDataHandle, capabilities);
// Return value is HIDP_STATUS_SUCCESS or HIDP_STATUS_INVALID_PREPARSED_DATA
// https://docs.microsoft.com/windows-hardware/drivers/ddi/hidpi/nf-hidpi-hidp_getbuttoncaps
isGetCaps = getCapResult == NativeMethods.HIDP_STATUS.SUCCESS;
}
if (!isGetCaps)
{
throw new GetHidCapabilitiesException($"Could not get capabilities by this {nameof(handle)}: {handle}");
}
return(capabilities);
}
internal static extern HIDP_STATUS HidP_GetCaps(SafePreParsedDataHandle preparsedData, [MarshalAs(UnmanagedType.LPStruct), In, Out] HidCapabilities capabilities);