pinvoke.net: Edit: setupapi.SetupDiSetClassInstallParam

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Summary: The SetupDiSetClassInstallParams function sets or clears class install parameters for a device information set or a particular device information element.

!!!!C# Signature:
 [DllImport("setupapi.dll", SetLastError = true, CharSet = CharSet.Auto)]
 static extern bool SetupDiSetClassInstallParams(IntPtr DeviceInfoSet, ref SP_DEVINFO_DATA DeviceInfoData, IntPtr ClassInstallParams, int ClassInstallParamsSize);
!!!!VB Signature:
 Declare Function SetupDiSetClassInstallParams Lib "setupapi.dll" (TODO) As TODO
!!!!User-Defined Types:
 [StructLayout(LayoutKind.Sequential, Pack = 1)]
 public struct SP_DEVINFO_DATA
 {
	public int cbSize;
	public Guid ClassGuid;
	public uint DevInst;
	public IntPtr Reserved;
 }
!!!!Alternative Managed API:
Do you know one?  Please contribute it!

!!!!Notes:
None.

!!!!Tips & Tricks:
Please add some!

!!!!Sample Code:
        //
        // http://www.codeproject.com/KB/cs/HardwareHelper.aspx
        //
        //Name:     ChangeIt
        //Inputs:   pointer to hdev, SP_DEV_INFO, bool
        //Outputs:  bool
        //Errors:   This method may throw the following exceptions.
        //          Unable to change device state!
        //Remarks:  Attempts to enable or disable a device driver.  
        //          IMPORTANT NOTE!!!   This code currently does not check the reboot flag.
        //          =================   Some devices require you reboot the OS for the change
        //                              to take affect.  If this describes your device, you 
        //                              will need to look at the SDK call:
        //                              SetupDiGetDeviceInstallParams.  You can call it 
        //                              directly after ChangeIt to see whether or not you need 
        //                              to reboot the OS for you change to go into effect.
        private bool ChangeIt(IntPtr hDevInfo, Native.SP_DEVINFO_DATA devInfoData, bool bEnable)
        {
            try
            {
                //Marshalling vars
                int szOfPcp;
                IntPtr ptrToPcp;
                int szDevInfoData;
                IntPtr ptrToDevInfoData;

Native.SP_PROPCHANGE_PARAMS pcp = new Native.SP_PROPCHANGE_PARAMS();
                if (bEnable)
                {
                    pcp.ClassInstallHeader.cbSize = Marshal.SizeOf(typeof(Native.SP_CLASSINSTALL_HEADER));
                    pcp.ClassInstallHeader.InstallFunction = Native.DIF_PROPERTYCHANGE;
                    pcp.StateChange = Native.DICS_ENABLE;
                    pcp.Scope = Native.DICS_FLAG_GLOBAL;
                    pcp.HwProfile = 0;
                    
                    //Marshal the params
                    szOfPcp = Marshal.SizeOf(pcp);
                    ptrToPcp = Marshal.AllocHGlobal(szOfPcp);
                    Marshal.StructureToPtr(pcp, ptrToPcp, true);
                    szDevInfoData = Marshal.SizeOf(devInfoData);
                    ptrToDevInfoData = Marshal.AllocHGlobal(szDevInfoData);

if (Native.SetupDiSetClassInstallParams(hDevInfo, ptrToDevInfoData, ptrToPcp, Marshal.SizeOf(typeof(Native.SP_PROPCHANGE_PARAMS))))
                    {
                        Native.SetupDiCallClassInstaller(Native.DIF_PROPERTYCHANGE, hDevInfo, ptrToDevInfoData);
                    }
                    pcp.ClassInstallHeader.cbSize = Marshal.SizeOf(typeof(Native.SP_CLASSINSTALL_HEADER));
                    pcp.ClassInstallHeader.InstallFunction = Native.DIF_PROPERTYCHANGE;
                    pcp.StateChange = Native.DICS_ENABLE;
                    pcp.Scope = Native.DICS_FLAG_CONFIGSPECIFIC;
                    pcp.HwProfile = 0;
                }
                else
                {
                    pcp.ClassInstallHeader.cbSize = Marshal.SizeOf(typeof(Native.SP_CLASSINSTALL_HEADER));
                    pcp.ClassInstallHeader.InstallFunction = Native.DIF_PROPERTYCHANGE;
                    pcp.StateChange = Native.DICS_DISABLE;
                    pcp.Scope = Native.DICS_FLAG_CONFIGSPECIFIC;
                    pcp.HwProfile = 0;
                }
                //Marshal the params
                szOfPcp = Marshal.SizeOf(pcp);
                ptrToPcp = Marshal.AllocHGlobal(szOfPcp);
                Marshal.StructureToPtr(pcp, ptrToPcp, true);
                szDevInfoData = Marshal.SizeOf(devInfoData);
                ptrToDevInfoData = Marshal.AllocHGlobal(szDevInfoData);
                Marshal.StructureToPtr(devInfoData, ptrToDevInfoData,true);

bool rslt1 = Native.SetupDiSetClassInstallParams(hDevInfo, ptrToDevInfoData, ptrToPcp, Marshal.SizeOf(typeof(Native.SP_PROPCHANGE_PARAMS)));
                bool rstl2 = Native.SetupDiCallClassInstaller(Native.DIF_PROPERTYCHANGE, hDevInfo, ptrToDevInfoData);
                if ((!rslt1) || (!rstl2))
                {
                    throw new Exception("Unable to change device state!");
                    return false;
                }
                else
                {
                    return true;
                }
            }
            catch (Exception ex)
            {
                return false;
            }
        }

Documentation: SetupDiSetClassInstallParams@msdn on MSDN