com

I've imported the COM interface IPreviewHandler into a WinForms app and am using it to display previews for various types of documents (I look up the GUID of the appropriate preview handler in the registry, then use Activator.CreateInstance(guid) to instantiate the specific COM class. This works wonderfully for the vast majority of file types - Office formats, PDFs, videos, etc - however, after I instantiate the "Microsoft Windows TXT Preview Handler" {1531d583-8375-4d3f-b5fb-d23bbd169f22} , initialise it with a stream containing an ordinary .txt file, set the bounds of the preview window and

I'm working on Matlab 64-bits R2011b, and I have to use a 32-bits version (I have R2010b installed) to command a hardware (32-bit dll). For that, I created a COM server with actxserver() and it works. However, whenever a function takes time in the 32-bit session, the 64-bit session becomes 'busy' and nothing works anymore until completion. I simplified my problem in the script below : if you have two Matlab versions installed, you can try my code and see my problem. In a few words : one button starts a timer that simply shows the time elapsed since it was started the other button makes a 2

How do I access the classic Internet Explorer COM automation object for a running instance of Internet Explorer? That is, if I have Internet Explorer open in multiple windows, how do I associate the COM object corresponding to one of those windows with a variable in Powershell, from within Powershell? The closest I have come to doing this is obtaining the processes "iexplore" and "ieuser" via get-process. Usually, to obtain access to a COM interface on an existing object, you would use the running object table. Unfortunately, Internet Explorer doesn't register itself with the running object

I have written an assembly in C# which returns a string array, the C# code is below: [ComVisible(true)] public class PostcodeFinder { public string[] SearchPostcodes(string postCode) { var searchService = new QuickAddress("http://x.x.x.x:xxxx/") {Engine = QuickAddress.EngineTypes.Singleline, Flatten = true}; var mPicklist = searchService.Search("GBR", postCode, PromptSet.Types.OneLine); var x = mPicklist.Picklist.Items.Count(); var resultsToReturn = new string[x]; for (var i = 0; i < x; i++) { resultsToReturn[i] = mPicklist.Picklist.Items[i].PartialAddress; } return resultsToReturn; } } I have

I have the following hierarchy of COM interfaces and a class implementing them: interface IX : public IUnknown{}; interface IY : public IUnknown{}; class CA: public IX, public IY{}; Here class CA effectively inherits from IUnknown twice. We know there are two vtable pointers in class CA - one is pointed to IX and another is pointed to IY . So IUnknown stored in the IX subobject is different from IUnknown stored in the IY subobject. Yet when we call IX::QueryInterface() or IY::QueryInterface() on the same object and query IUnknown we get identical IUnknown* pointers. Why does it happen?

I am trying to call a .NET 4.0 dll from unmanaged C++ code. I followed the instructions in this Code Project article by Atul Mani. I built the .NET dll, and followed all the steps up to and including registering it with regasm. Next, I created an unmanaged C++ project and added this line at the start of the .cpp file: #import "D:\PathToMyCSharpProject\bin\Debug\com.DeviceServices.tlb" rename ("EOF","adoEOF") no_namespace named_guids raw_interfaces_only When I built the C++ project, a .tlh file was created in D:\MyCPlusPlusProject\Debug. Next, I added the code suggested by the CodeProject