private void StateChange(int newState, int selectedItem, IntPtr hDevInfo)
{
var propChangeParams = new UsbApi.SpPropchangeParams();
propChangeParams.Init();
var deviceInfoData = new UsbApi.SpDevinfoData();
propChangeParams.ClassInstallHeader.CbSize = Marshal.SizeOf(propChangeParams.ClassInstallHeader);
deviceInfoData.CbSize = Marshal.SizeOf(deviceInfoData);
if (!UsbApi.SetupDiEnumDeviceInfo(hDevInfo, selectedItem, ref deviceInfoData))
{
return;
}
propChangeParams.ClassInstallHeader.InstallFunction = UsbApi.DifPropertychange;
propChangeParams.Scope = UsbApi.DicsFlagGlobal;
propChangeParams.StateChange = newState;
if (!UsbApi.SetupDiSetClassInstallParams(hDevInfo, ref deviceInfoData, ref propChangeParams.ClassInstallHeader, Marshal.SizeOf(propChangeParams)))
{
return;
}
UsbApi.SetupDiCallClassInstaller(UsbApi.DifPropertychange, hDevInfo, ref deviceInfoData);
}
private bool SetDevice(DeviceControlFlags deviceControlFlag, ushort vendorid, ushort productid)
{
Guid myGuid = Guid.Empty;
var deviceInfoData = new UsbApi.SpDevinfoData1
{
CbSize = 28,
DevInst = 0,
ClassGuid = Guid.Empty,
Reserved = 0
};
UInt32 i = 0;
StringBuilder deviceName = new StringBuilder()
{
Capacity = UsbApi.MaxBufferSize
};
//The SetupDiGetClassDevs function returns a handle to a device information set that contains requested device information elements for a local machine.
IntPtr theDevInfo = UsbApi.SetupDiGetClassDevs(ref myGuid, 0, 0, UsbApi.DigcfAllclasses | UsbApi.DigcfPresent | UsbApi.DigcfProfile);
for (; UsbApi.SetupDiEnumDeviceInfo(theDevInfo, i, deviceInfoData);)
{
if (UsbApi.SetupDiGetDeviceRegistryProperty(theDevInfo, deviceInfoData, (uint)UsbApi.Spdrp.SpdrpHardwareid, 0, deviceName, UsbApi.MaxBufferSize, IntPtr.Zero))
{
if (deviceName.ToString().Contains(@"USB\Vid_") && deviceName.ToString().Contains(vendorid.ToString("x")))
{
StateChange(
deviceControlFlag == DeviceControlFlags.Disable ? UsbApi.DicsDisable : UsbApi.DicsEnable,
(int)i, theDevInfo);
UsbApi.SetupDiDestroyDeviceInfoList(theDevInfo);
break;
}
}
i++;
}
return(true);
}
private void GetComPort()
{
IntPtr regValue = IntPtr.Zero;
IntPtr regKey = IntPtr.Zero;
IntPtr handle = IntPtr.Zero;
IntPtr ptr = IntPtr.Zero;
try
{
handle =
UsbApi.SetupDiGetClassDevs(0, UsbApi.RegstrKeyUsb, IntPtr.Zero, UsbApi.DigcfPresent | UsbApi.DigcfAllclasses);
if (handle.ToInt64() != UsbApi.InvalidHandleValue)
{
ptr = Marshal.AllocHGlobal(UsbApi.MaxBufferSize);
var success = true;
for (var i = 0; success; i++)
{
var deviceInfoData = new UsbApi.SpDevinfoData();
deviceInfoData.CbSize = Marshal.SizeOf(deviceInfoData);
success = UsbApi.SetupDiEnumDeviceInfo(handle, i, ref deviceInfoData);
if (success)
{
var requiredSize = -1;
var regType = UsbApi.RegSz;
var driverKey = string.Empty;
if (UsbApi.SetupDiGetDeviceRegistryProperty(handle, ref deviceInfoData,
(int)UsbApi.Spdrp.SpdrpDriver,
ref regType, ptr, UsbApi.MaxBufferSize, ref requiredSize))
{
driverKey = Marshal.PtrToStringAuto(ptr);
}
if (DriverKey == driverKey)
{
regKey = UsbApi.SetupDiOpenDevRegKey(handle, ref deviceInfoData, UsbApi.DicsFlag.Global, 0, UsbApi.DiReg.Dev, (uint)WinNtApi.KeyRead);
int size = 0;
Advapi32.RegValueKind kind = Advapi32.RegValueKind.None;
// Get the size of buffer we will need
uint retVal = Advapi32.RegQueryValueEx(regKey, "PortName", 0, ref kind, IntPtr.Zero, ref size);
if (size == 0)
{
break;
}
regValue = Marshal.AllocHGlobal(size);
if (Advapi32.RegQueryValueEx(regKey, "PortName", 0, ref kind, regValue, ref size) == 0)
{
if (kind == Advapi32.RegValueKind.Sz)
{
_comPort = Marshal.PtrToStringAnsi(regValue);
}
}
}
}
}
}
}
finally
{
if (regValue != IntPtr.Zero)
{
Marshal.FreeHGlobal(regValue);
}
if (regKey != IntPtr.Zero)
{
Marshal.FreeHGlobal(regKey);
}
if (handle != IntPtr.Zero)
{
Marshal.FreeHGlobal(ptr);
}
if (handle != IntPtr.Zero)
{
UsbApi.SetupDiDestroyDeviceInfoList(handle);
}
}
}