/* get device path */
private string GetPath(IntPtr hInfoSet, ref DeviceInterfaceData iface)
{
/* detailed interface information */
var detIface = new 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 = HIDNativeAPIs.SetupDiGetDeviceInterfaceDetail(hInfoSet, ref iface, ref detIface, reqSize, ref reqSize, IntPtr.Zero);
/* whops */
if (!status)
{
/* fail! */
throw new Win32Exception();
}
/* return device path */
return(detIface.DevicePath);
}
public static extern bool SetupDiGetDeviceInterfaceDetail(
IntPtr lpDeviceInfoSet, ref DeviceInterfaceData oInterfaceData,
ref DeviceInterfaceDetailData oDetailData,
uint nDeviceInterfaceDetailDataSize, ref uint nRequiredSize,
IntPtr lpDeviceInfoData);
