How to avoid the "Unsafe Removal" dialog box

    case IRP_MN_QUERY_CAPABILITIES: {
        // 
        // Set the SurpiseremovalOK capability to true because this device
        // can safely tolerate surprise remove, and we want to avoid the unsafe device
        // removal UI
        // 

        stack->Parameters.DeviceCapabilities.Capabilities->SurpriseRemovalOK = TRUE;

        if (!IoIsWdmVersionAvailable(1, 0x20) /* & this is a for USB device */) {		
            // 
            // Reset the SurpriseRemovalOK capability back to TRUE when the IRP is on
            // the way back up to work around a bug in Windows 2000 USB hub driver that 
            // incorrectly sets this capability to FALSE
            // 
            // NOTE: IoIsWdmVersionAvailable(1, 0x20) returns TRUE on o/s after 
            // Windows 2000 & Windows Millennium Edition
            // 
 
            // 
            // This function defined in toaster.c basically sends the Irp to the lower 
            // driver and waits for it complete.
            // 
            status = ToasterSendIrpSynchronously(fdoData->NextLowerDriver, Irp);
            if (NT_SUCCESS (status)) {

                stack->Parameters.DeviceCapabilities.Capabilities->SurpriseRemovalOK=TRUE;
            }
        } else {

            // 
            // WDM version is 2.0 or newer (or this is not a USB driver)
            // so assume the bus driver will not erroneously reset the SurpiseRemovalOK
            // capability and just pass the IRP down
            // 

            IoSkipCurrentIrpStackLocation (Irp);
            status = IoCallDriver (fdoData->NextLowerDriver, Irp);
            ToasterIoDecrement(fdoData); //this function is defined in toaster.c
            return status;
        }
    }
    break;