/* get device path */
private static string GetPath(IntPtr hInfoSet,
ref Native.DeviceInterfaceData iface)
{
/* detailed interface information */
var detIface = new Native.DeviceInterfaceDetailData();
/* required size */
uint reqSize = (uint)Marshal.SizeOf(detIface);
/* set size. The cbSize member always contains the size of the
* fixed part of the data structure, not a size reflecting the
* variable-length string at the end. */
/* now stay with me and look at that x64/x86 maddness! */
detIface.Size = Marshal.SizeOf(typeof(IntPtr)) == 8 ? 8 : 5;
/* get device path */
bool status = Native.SetupDiGetDeviceInterfaceDetail(hInfoSet,
ref iface, ref detIface, reqSize, ref reqSize, IntPtr.Zero);
/* whops */
if (!status)
{
/* fail! */
throw new Win32Exception();
}
/* return device path */
return(detIface.DevicePath);
}
/* browse all HID class devices */
public static List<HIDInfo> Browse()
{
/* hid device class guid */
Guid gHid;
/* list of device information */
List<HIDInfo> info = new List<HIDInfo>();
/* obtain hid guid */
Native.HidD_GetHidGuid(out gHid);
/* get list of present hid devices */
var hInfoSet = Native.SetupDiGetClassDevs(ref gHid, null, IntPtr.Zero,
Native.DIGCF_DEVICEINTERFACE | Native.DIGCF_PRESENT);
/* allocate mem for interface descriptor */
var iface = new Native.DeviceInterfaceData();
/* set size field */
iface.Size = Marshal.SizeOf(iface);
/* interface index */
uint index = 0;
/* iterate through all interfaces */
while (Native.SetupDiEnumDeviceInterfaces(hInfoSet, 0, ref gHid,
index, ref iface)) {
/* vid and pid */
short vid, pid;
/* get device path */
var path = GetPath(hInfoSet, ref iface);
/* open device */
var handle = Open(path);
/* device is opened? */
if (handle != Native.INVALID_HANDLE_VALUE) {
/* get device manufacturer string */
var man = GetManufacturer(handle);
/* get product string */
var prod = GetProduct(handle);
/* get serial number */
var serial = GetSerialNumber(handle);
/* get vid and pid */
GetVidPid(handle, out vid, out pid);
/* build up a new element */
HIDInfo i = new HIDInfo(prod, serial, man, path, vid, pid);
/* add to list */
info.Add(i);
/* close */
Close(handle);
}
/* next, please */
index++;
}
/* clean up */
if (Native.SetupDiDestroyDeviceInfoList(hInfoSet) == false) {
/* fail! */
throw new Win32Exception();
}
/* return list */
return info;
}
/* browse all HID class devices */
public static List <HIDInfo> Browse()
{
/* hid device class guid */
Guid gHid;
/* list of device information */
List <HIDInfo> info = new List <HIDInfo>();
/* obtain hid guid */
Native.HidD_GetHidGuid(out gHid);
/* get list of present hid devices */
var hInfoSet = Native.SetupDiGetClassDevs(ref gHid, null, IntPtr.Zero,
Native.DIGCF_DEVICEINTERFACE | Native.DIGCF_PRESENT);
/* allocate mem for interface descriptor */
var iface = new Native.DeviceInterfaceData();
/* set size field */
iface.Size = Marshal.SizeOf(iface);
/* interface index */
uint index = 0;
/* iterate through all interfaces */
while (Native.SetupDiEnumDeviceInterfaces(hInfoSet, 0, ref gHid,
index, ref iface))
{
/* vid and pid */
short vid, pid;
/* get device path */
var path = GetPath(hInfoSet, ref iface);
/* open device */
var handle = Open(path);
/* device is opened? */
if (handle != Native.INVALID_HANDLE_VALUE)
{
/* get device manufacturer string */
var man = GetManufacturer(handle);
/* get product string */
var prod = GetProduct(handle);
/* get serial number */
var serial = GetSerialNumber(handle);
/* get vid and pid */
GetVidPid(handle, out vid, out pid);
/* build up a new element */
HIDInfo i = new HIDInfo(prod, serial, man, path, vid, pid);
/* add to list */
info.Add(i);
/* close */
Close(handle);
}
/* next, please */
index++;
}
/* clean up */
if (Native.SetupDiDestroyDeviceInfoList(hInfoSet) == false)
{
/* fail! */
throw new Win32Exception();
}
/* return list */
return(info);
}
