Windows error 0x80040200, -2147220992

connecting managed event source to an unmanaged event sink

I'm trying to write a managed library in C# that will act as an event source for an existing C++ event sink. The problem I'm having is that when the unmanaged app calls AtlAdvise to get the connection point map for my library it is getting the error "0x80040200" (CONNECT_E_NOCONNECTION) [...] read more

OCX AfxOleRegisterTypeLib fails with error 0x80040200

I upgraded an OCX library from VS2010/Win7 to VS2019/Win10. The project builds, however when I try and use RegSvr32.exe from an elevated command prompt, I receive error 0x0040200. I did a bit of debugging and the offending call is the call to AfxOleRegisterTypeLib. RegSvr32.exe OCX error 0x80040200 [https://i.stack.imgur.com/gRxhm.png] Yes, I [...] read more

C# Skype bot (Skype4com) Windows Service

I've been working on a Skype bot program. The idea is the when the user sends messages to the bot with certain keywords it will provide the results of a SQL script that is run in the background. I've been able to get it to work as a Windows console [...] read more

Handling an OnClick event of a checkbox

I'm trying to handle click events of a checkbox control from a BHO. Here is my code: void STDMETHODCALLTYPE CMyBHO::OnDocumentComplete(IDispatch *pDisp, VARIANT *pvarURL) { // ... InitPage(pDocument); } void CMyBHO::InitPage(IHTMLDocument2 *pDocument) { CComQIPtr<IHTMLDocument3> document3 = pDocument; CComPtr<IHTMLElement> elementCheckbox; document3->getElementById(CComBSTR(L"checkbox_id_here"), &elementCheckbox); if(!elementCheckbox) return; if(!m_fCheckboxAdvised) { // Register to sink events from [...] read more

C# "This Mediatype is not valid"

I try to create a video from a picture and a MP3 with splicer. With some audio files, I do not have any problems, but for some reasons, I get "This Mediatype is not valid.". Here is my code, maybe you can help me CreateVideo(@"C:\save_in_here\test.wmv", @"C:\pic\1.jpg", @"C:\mus\1.mp3"); . . . [...] read more

Ruby Office Automation - cannot get event handlers to work in MSWord

Ruby version 1.9.1p430 running on W7 with Office 2010. I am trying to catch the DocumentBeforeClose event but I cannot even get close to get it to work! I have followed some examples using Excel where the SheetSelectionChange is handled. It works without any problem. Using the same process, I [...] read more

How to connect object to the filter graph?

What I need to do is - get decoded sample frames (like vector<frames>) from DirectShow in order to do it I follow this implementation https://docs.microsoft.com/en-us/windows/win32/directshow/using-the-sample-grabber There is my implementation bool coAudioPlayerSampleGrabber::LoadImp(SoundDataType dataType, unsigned char const * pData, int64_t dataLen) { Cleanup(); m_bReady = false; HRESULT hr = S_OK; assert(pData); assert(dataLen); [...] read more

Unable to active windows store app .Unknown error:0x80040200

Screenshot of error message [https://i.stack.imgur.com/pxOZn.png] This Project was based on Windows10 IoTCore "Hello World"Damo.I Want to show Image by pure rgb bytes array.So I added my code in this. public async void Func() { int ret; uint mode, x, y, width, height; mode = x = y = width = [...] read more

Cannot register my .ocx with error code 0x80040200

When i try to register my .ocx file I get error code 0x80040200. I know that this error usually occurs when I got no administrator privileges, but for me that's not the case. I found some code snippet with which I could test my .ocx wether regsvr32 can find the [...] read more

Is it safe to ignore the result of DispEventUnadvise?

I'm writing a BHO using ATL and I'm using DispEventUnadvise as part of my SetSite function to disconnect from Internet Explorer. This is my code: STDMETHODIMP FooBho::SetSite(IUnknown* site) { if (site != nullptr) { if( this->webBrowser != nullptr ) { this->webBrowser.Release(); } // Cache the pointer to IWebBrowser2. HRESULT hr [...] read more

C# IConnectionPointContainer.FindConnectionPoint throws exception

I am trying to implement an ATL COM module with a connection point. The source code for this is all pretty much boilerplate that I copied by example from chapter 12 of Developer's Workshop to COM and ATL 3.0 by Andrew W. Troelsen. That's a lot of code, with three [...] read more

Crystal Server .NET integration Enterprise ReportDocument.Load Exception

I'm using Visual Studio 2010 with the various required plugins installed to communicate with SAP Crystal Server 2011. Everything is working fine and I can query data (e.g. return a list of folders within a folder) with no problems. I'm trying to integrate this with the CrystalReportViewer component which appears [...] read more

How to troubleshoot "Property value is invalid. Make sure the value is typed correctly."?

I'm calling a COM library from .NET through a interop assembly and getting the following error: System.Runtime.InteropServices.COMException(0x80040200): Internal error (ADODB.Connection, -2147467259, Property value is invalid. Make sure the value is typed correctly.) I have a test and a production version of the same external system. When calling the test system [...] read more