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);
public static extern bool SetupDiEnumDeviceInfo(SafeDeviceInfoSetHandle deviceInfoSet, int memberIndex, ref DeviceInfoData deviceInfoData);
public static extern bool SetupDiGetDeviceInstanceId( IntPtr DeviceInfoSet, ref DeviceInfoData did, [MarshalAs(UnmanagedType.LPTStr)] StringBuilder DeviceInstanceId, int DeviceInstanceIdSize, out int RequiredSize );
// Find the index of the particular DeviceInfoData for the instanceId. private static int GetIndexOfInstance(SafeDeviceInfoSetHandle handle, DeviceInfoData[] diData, string instanceId) { 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(handle.DangerousGetHandle(), ref diData[index], sb, sb.Capacity, out requiredSize); if (result == false && Marshal.GetLastWin32Error() == ERROR_INSUFFICIENT_BUFFER) { sb.Capacity = requiredSize; result = NativeMethods.SetupDiGetDeviceInstanceId(handle.DangerousGetHandle(), ref diData[index], sb, sb.Capacity, out requiredSize); } if (result == false) throw new Win32Exception(); if (instanceId.Equals(sb.ToString())) { return index; } } // not found return -1; }
private static DeviceInfoData[] GetDeviceInfoData(SafeDeviceInfoSetHandle handle) { List<DeviceInfoData> data = new List<DeviceInfoData>(); DeviceInfoData did = new DeviceInfoData(); int didSize = Marshal.SizeOf(did); did.Size = didSize; int index = 0; while (NativeMethods.SetupDiEnumDeviceInfo(handle, index, ref did)) { data.Add(did); index += 1; did = new DeviceInfoData(); did.Size = didSize; } return data.ToArray(); }
// 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(); 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(); } }