internal static byte CountDevices(Guid g)
{
byte Devices = 0;
IntPtr hwDeviceInfo = SetupDiGetClassDevs(ref g, null, IntPtr.Zero, CyConst.DIGCF_PRESENT | CyConst.DIGCF_INTERFACEDEVICE);
if (IsHandleValid(hwDeviceInfo))
{
SP_DEVICE_INTERFACE_DATA devInterfaceData = new SP_DEVICE_INTERFACE_DATA();
devInterfaceData.cbSize = Marshal.SizeOf(devInterfaceData);
// if (IntPtr.Size == 8)
//devInterfaceData.cbSize = devInterfaceData.cbSize + 4;
//devInterfaceData.InterfaceClassGuid = g;
// Count the number of devices
uint i = 0;
bool bDone = false;
while (!bDone)
{
//SetupDiEnumDeviceInterfaces (hwDeviceInfo, 0, ref g, i, devInterfaceData)
if (SetupDiEnumDeviceInterfaces(hwDeviceInfo, 0, ref g, i, devInterfaceData))
Devices++;
else
{
int dwLastError = Marshal.GetLastWin32Error();
if (dwLastError == CyConst.ERROR_NO_MORE_ITEMS) bDone = true;
}
i++;
}
SetupDiDestroyDeviceInfoList(hwDeviceInfo);
}
return Devices;
}
internal static string GetDevicePath(Guid g, uint dev, byte[] enumer)
{
IntPtr hDevice = CyConst.INVALID_HANDLE;
int predictedLength = 0;
int actualLength = 0;
uint flags = CyConst.DIGCF_PRESENT | (uint)((enumer == null) ? CyConst.DIGCF_INTERFACEDEVICE : CyConst.DIGCF_ALLCLASSES);
IntPtr hwDeviceInfo = SetupDiGetClassDevs(ref g, enumer, IntPtr.Zero, flags);
if (hwDeviceInfo.Equals(-1))
return "";
SP_DEVICE_INTERFACE_DATA devInterfaceData = new SP_DEVICE_INTERFACE_DATA();
devInterfaceData.cbSize = Marshal.SizeOf(devInterfaceData);
//if (IntPtr.Size == 8)
//devInterfaceData.cbSize = devInterfaceData.cbSize + 4;
int mysize = Marshal.SizeOf(devInterfaceData.Reserved);
if (!SetupDiEnumDeviceInterfaces(hwDeviceInfo, 0, ref g, dev, devInterfaceData))
{
SetupDiDestroyDeviceInfoList(hwDeviceInfo);
return "";
}
SetupDiGetDeviceInterfaceDetail(hwDeviceInfo, devInterfaceData, null, 0, ref predictedLength, null);
//predictedLength = predictedLength+5;
byte[] detailData = new byte[predictedLength];
detailData[0] = 5; // Set the cbSize field of what would be a SP_DEVICE_INTERFACE_DETAIL_DATA struct
if (IntPtr.Size == 8)
detailData[0] = 8;
/*if (Marshal.SystemDefaultCharSize == 2)
detailData[0] = 4 + 4;
else
detailData[0] = 4 + 1;*/
if (!SetupDiGetDeviceInterfaceDetail(hwDeviceInfo, devInterfaceData, detailData,
predictedLength, ref actualLength, null))
{
int Error = Marshal.GetLastWin32Error();
SetupDiDestroyDeviceInfoList(hwDeviceInfo);
return "";
}
//
// Convert to a string
//
// DWY - Ensure null terminator for string class constructor.
//
char[] cData = new char[actualLength - 3];
for (int i = 0; i < (actualLength - 4); i++)
{
cData[i] = (char)detailData[i + 4];
cData[i + 1] = '\0';
}
string path = new string(cData);
SetupDiDestroyDeviceInfoList(hwDeviceInfo);
return path;
}
