// enable/disable...
private static void EnableDevice(SafeDeviceInfoSetHandle handle, DeviceInfoData diData, bool enable)
{
PropertyChangeParameters @params = new PropertyChangeParameters();
// The size is just the size of the header, but we've flattened the structure.
// The header comprises the first two fields, both integer.
@params.Size = 8;
@params.DiFunction = DiFunction.PropertyChange;
@params.Scope = Scopes.Global;
if (enable)
{
@params.StateChange = StateChangeAction.Enable;
}
else
{
@params.StateChange = StateChangeAction.Disable;
}
bool result = NativeMethods.SetupDiSetClassInstallParams(handle, ref diData, ref @params, Marshal.SizeOf(@params));
if (result == false)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
result = NativeMethods.SetupDiCallClassInstaller(DiFunction.PropertyChange, handle, ref diData);
if (result == false)
{
int err = Marshal.GetLastWin32Error();
if (err == (int)SetupApiError.NotDisableable)
{
throw new ArgumentException("Device can't be disabled (programmatically or in Device Manager).");
}
else if (err <= (int)SetupApiError.NoAssociatedClass && err >= (int)SetupApiError.OnlyValidateViaAuthenticode)
{
throw new Win32Exception("SetupAPI error: " + ((SetupApiError)err).ToString());
}
else
{
throw new Win32Exception(err);
}
}
}
private static List <string> GetInstanceIdsFromClassGuid(Guid classGuid)
{
SafeDeviceInfoSetHandle diSetHandle = null;
List <string> resultList = new List <string>();
try
{
// Get the handle to a device information set for all devices matching classGuid that are present on the
// system.
diSetHandle = NativeMethods.SetupDiGetClassDevs(ref classGuid, null, IntPtr.Zero, SetupDiGetClassDevsFlags.Present);
// Get the device information data for each matching device.
DeviceInfoData[] diData = GetDeviceInfoData(diSetHandle);
const int ERROR_INSUFFICIENT_BUFFER = 122;
for (int index = 0; index <= diData.Length - 1; index++)
{
StringBuilder sb = new StringBuilder(1);
int requiredSize = 0;
bool result = NativeMethods.SetupDiGetDeviceInstanceId(diSetHandle.DangerousGetHandle(), ref diData[index], sb, sb.Capacity, out requiredSize);
if (result == false && Marshal.GetLastWin32Error() == ERROR_INSUFFICIENT_BUFFER)
{
sb.Capacity = requiredSize;
result = NativeMethods.SetupDiGetDeviceInstanceId(diSetHandle.DangerousGetHandle(), ref diData[index], sb, sb.Capacity, out requiredSize);
resultList.Add(sb.ToString());
}
}
}
finally
{
if (diSetHandle != null)
{
if (diSetHandle.IsClosed == false)
{
diSetHandle.Close();
}
diSetHandle.Dispose();
}
}
return(resultList);
}
public static extern bool SetupDiEnumDeviceInfo(
SafeDeviceInfoSetHandle deviceInfoSet,
int memberIndex,
ref DeviceInfoData deviceInfoData);
public static extern bool SetupDiSetClassInstallParams(
SafeDeviceInfoSetHandle deviceInfoSet,
[In()] ref DeviceInfoData deviceInfoData,
[In()] ref PropertyChangeParameters classInstallParams,
int classInstallParamsSize);
public static extern bool SetupDiCallClassInstaller(
DiFunction installFunction,
SafeDeviceInfoSetHandle deviceInfoSet,
[In()] ref DeviceInfoData deviceInfoData);