public static extern unsafe int SetupDiGetDeviceInterfaceDetail(
int DeviceInfoSet,
ref UsbNativeType.SP_DEVICE_INTERFACE_DATA lpDeviceInterfaceData,
ref UsbNativeType.PSP_DEVICE_INTERFACE_DETAIL_DATA myPSP_DEVICE_INTERFACE_DETAIL_DATA,
int detailSize,
ref int requiredSize,
int *bPtr);
private unsafe static string GetDevicePath(UsbNativeType.GUID guid, int hardwareDevInfo, int device_number)
{
int result = 0;
UsbNativeType.SP_DEVICE_INTERFACE_DATA interfaceData = new UsbNativeType.SP_DEVICE_INTERFACE_DATA();
interfaceData.cbSize = Marshal.SizeOf(interfaceData);
// get the device_number device interface
result = UsbNativeApi.SetupDiEnumDeviceInterfaces(
hardwareDevInfo,
0,
ref guid,
device_number,
ref interfaceData);
// get the required size for the device interface system path
int devicePathSize = 0;
result = UsbNativeApi.SetupDiGetDeviceInterfaceDetail(
hardwareDevInfo, // IN HDEVINFO DeviceInfoSet,
ref interfaceData, // IN PSP_DEVICE_INTERFACE_DATA DeviceInterfaceData,
null, // DeviceInterfaceDetailData, OPTIONAL
0, // IN DWORD DeviceInterfaceDetailDataSize,
ref devicePathSize, // OUT PDWORD RequiredSize, OPTIONAL
null); //
// get the actual device interface details
UsbNativeType.PSP_DEVICE_INTERFACE_DETAIL_DATA interfaceDetail = new UsbNativeType.PSP_DEVICE_INTERFACE_DETAIL_DATA();
interfaceDetail.cbSize = 5; // sizeof (SP_DEVICE_INTERFACE_DETAIL_DATA) == 5 in C
result = UsbNativeApi.SetupDiGetDeviceInterfaceDetail(
hardwareDevInfo, // IN HDEVINFO DeviceInfoSet,
ref interfaceData, // IN PSP_DEVICE_INTERFACE_DATA DeviceInterfaceData,
ref interfaceDetail, // DeviceInterfaceDetailData, OPTIONAL
devicePathSize, // IN DWORD DeviceInterfaceDetailDataSize,
ref devicePathSize, // OUT PDWORD RequiredSize, OPTIONAL
null); //
return(interfaceDetail.DevicePath);
}
public static extern unsafe int SetupDiEnumDeviceInterfaces(
int DeviceInfoSet,
int DeviceInfoData,
ref UsbNativeType.GUID lpHidGuid,
int MemberIndex,
ref UsbNativeType.SP_DEVICE_INTERFACE_DATA lpDeviceInterfaceData);
