private static extern int HidP_GetCaps(int PreparsedData, ref HIDP_CAPS Capabilities);
private bool GetFeature(int hDevice, byte[] array_out, int out_len)
{
bool FeatureStatus;
bool Status;
int i;
byte[] FeatureReportBuffer = new byte[512];
int Ppd = 0;
HIDP_CAPS Caps = new HIDP_CAPS();
if (!HidD_GetPreparsedData(hDevice, ref Ppd)) return false;
if (HidP_GetCaps(Ppd, ref Caps) <= 0)
{
HidD_FreePreparsedData(Ppd);
return false;
}
Status = true;
FeatureReportBuffer[0] = 1;
FeatureStatus = HidD_GetFeature(hDevice, FeatureReportBuffer, Caps.FeatureReportByteLength);
if (FeatureStatus)
{
for (i = 0; i < out_len; i++)
{
array_out[i] = FeatureReportBuffer[i];
}
}
Status = Status && FeatureStatus;
HidD_FreePreparsedData(Ppd);
return Status;
}
private bool SetFeature(int hDevice, byte[] array_in, int in_len)
{
bool FeatureStatus;
bool Status;
int i;
byte[] FeatureReportBuffer = new byte[512];
int Ppd = 0;
HIDP_CAPS Caps = new HIDP_CAPS();
if (!HidD_GetPreparsedData(hDevice, ref Ppd)) return false;
if (HidP_GetCaps(Ppd, ref Caps) <= 0)
{
HidD_FreePreparsedData(Ppd);
return false;
}
Status = true;
FeatureReportBuffer[0] = 2;
for (i = 0; i < in_len; i++)
{
FeatureReportBuffer[i + 1] = array_in[i + 1];
}
FeatureStatus = HidD_SetFeature(hDevice, FeatureReportBuffer, Caps.FeatureReportByteLength);
Status = Status && FeatureStatus;
HidD_FreePreparsedData(Ppd);
return Status;
}