Type registration required: IPXV_Inst.CreateOp().Params.Root

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Posts: 3
Joined: Thu Oct 05, 2017 11:56 am

Type registration required: IPXV_Inst.CreateOp().Params.Root

Post by scoberry » Tue Oct 17, 2017 12:17 pm

We have some code that sometimes runs on 32-bit, sometimes on 64-bit, and we'd like to avoid registering DLLs.

http://sdkhelp.tracker-software.com/view/PXV:PXV_Inst says you can use the SDK in most circumstances without registration (but not PXV_Control).

That matches what I wanted to do: I'm trying to extract pages from a PDF file. So I have the code below, but it fails if we get to operation.Params.Root, throwing because a library isn't registered.

It seems like if you can't get to operation.Params.Root, you wouldn't be able to do much with PXV_Inst without requiring registration. Is there something I'm missing?


Code: Select all

using System;
using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;

namespace Test
    class Program
        static void Main(string[] args)
            string outputPath = @"c:\outputPath\out.pdf";
            //string inputPath = @"c:\inputPath\in.pdf";

            const uint opExecFlagsNoUINoProgress = 3;

            string libraryName = IntPtr.Size == 4 ? "PDFXEditCore.x86.DLL" : "PDFXEditCore.x64.DLL";
            IntPtr module = LoadLibrary(libraryName);
            IntPtr hProc = GetProcAddress(module, "PXV_GetInstance");
            var pxvDelegate = (PXV_GetInstance)(object)Marshal.GetDelegateForFunctionPointer(hProc, typeof(PXV_GetInstance));
            IPXV_Inst typedInstance;
            HRESULT result = pxvDelegate(out typedInstance);
            dynamic instance = typedInstance;
            instance.Init(Missing.Value, "");
            int extractPagesId = instance.Str2ID("op.document.extractPages", false);
            var pxcInst = (dynamic)instance.GetExtension("PXC");

                //var doc = pxcInst.OpenDocumentFromFile(inputPath, Missing.Value); //Side issue: This gives DISP_E_BADVARTYPE

                var operation = instance.CreateOp(extractPagesId);
                var operationParams = operation.Params;
                var root = operationParams.Root; //Trying to get root throws because a type isn't registered

                var options = operation.Params.Root["Options"];
                var pagesRange = options["PagesRange"];
                pagesRange["Type"].v = 6;// PDFXEdit.RangeType.RangeType_Exact;
                pagesRange["Text"].v = string.Join(",", "4");
                options["OpenFolder"].v = false;
                options["ExtractPagesAction"].v = "AllToOneFile";
                options["LocalFolder"].v = Path.GetDirectoryName(outputPath);
                options["FileName"].v = Path.GetFileName(outputPath);

                var input = operation.Params.Root["Input"];
                //input.v = doc;

                instance.AsyncDoAndWaitForFinish(operation, opExecFlagsNoUINoProgress);

                byte[] bytes = File.ReadAllBytes(outputPath);
            catch (COMException ex)

        [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
        public static extern IntPtr LoadLibrary(string dllName);

        private delegate HRESULT PXV_GetInstance([MarshalAs(UnmanagedType.Interface)]out IPXV_Inst foo);

        [DllImport("kernel32.dll", SetLastError = true, ExactSpelling = true, CharSet = CharSet.Auto)]
        public static extern IntPtr GetProcAddress(IntPtr module, [In, MarshalAs(UnmanagedType.LPStr)] string procName);

    public struct HRESULT
        private readonly int _Value;

        public HRESULT(int value)
        { _Value = value; }

    interface IPXV_Inst

User avatar
Sasha - Tracker Dev Team
Posts: 4220
Joined: Fri Nov 21, 2014 8:27 am

Re: Type registration required: IPXV_Inst.CreateOp().Params.Root

Post by Sasha - Tracker Dev Team » Wed Oct 18, 2017 8:36 am

Hello scoberry,

Well, you can reference the dll itself as you are developing your project. But it won't be used once compiled.

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