com

问题 I would like to use the Windows Common Dialog "Open File", to get a file from the user under JScript. This used to be possible using "ShowOpen()" on MSCOMDLG.commondialog object but, I can't find an equivalent way to do this that works under Vista. 回答1: Try this: http://www.tech-archive.net/Archive/Scripting/microsoft.public.scripting.vbscript/2007-10/msg00444.html Helps? 回答2: You could probably fake it by using CreateObject("Shell.Application").BrowseForFolder( ... ) and use the BIF

问题 I have a simple .IDL file (iface.idl) which describes an IUnknown based interface: import "unknwn.idl"; [ uuid(80DFDD28-F033-431e-B027-CDD2078FC78A) ] interface ISunPathCalc : IUnknown { HRESULT Square([in, out] long * pVal); HRESULT Cube([in, out] long * pVal); }; When trying to compile it with midl /header iface.h iface.idl I'm getting 3 files: iface.h, iface_i.c and iface_p.c. The iface.h file contains a C++ declaration of ISunpathCalc interface: #if defined(__cplusplus) && !defined

问题 I have a DLL Com Server, actually used only by one old Delphi exe-application. COM Server is written many years ago (not by me) in C++ ATL. It implements callbacks (event - is it the same?) - using outgoing interface IConnectionPointImpl . Class Factory is singleton (marked with DECLARE_CLASSFACTORY_SINGLETON ) Now it is required that this COM Server have to be shared between more than one clients: both Delphi and C# (.NET 2.0, VS2008). I put it as DllSurrogate and now I can use it from

问题 I have the following function that I am attempting to use to determine the length of an MP3 file: public static string GetMP3DurationBackup(string Filename) { string Duration = null; WMPLib.WindowsMediaPlayer w = new WMPLib.WindowsMediaPlayer(); WMPLib.IWMPMedia m = w.newMedia(Filename); if (m != null) { Duration = m.durationString; } w.close(); return Duration; } I have run into an issue where I get the following error: Retrieving the COM class factory for component with CLSID {6BF52A52-394A

问题 The .NET Thread class has a handy function GetApartmentState() that returns the apartment of context of the thread. Is there a similar Co<something-something> function for native code (C++, C)? I feel like I should know, since I've been programming COM for almost 10 years, but I cannot find the answer. 回答1: The function you're looking for is CoGetApartmentType. 来源： https://stackoverflow.com/questions/15981228/how-to-query-the-com-apartment-state-for-the-current-thread

问题 I have a web project, a C# library project, and a web setup project in Visual Studio 2005. The web project needs the C# library needs to be registered in the GAC. This is simple, just add the GAC folder to the setup project and drop the primary output of the C# library in there. The C# library also needs to be registered for COM interop. I click select the primary output in the GAC folder and change the Register property to vsdrpCOM. I build the setup project and run it but the DLL never gets

问题 I have a very basic question. I have developed a com dll to be used from Access vba. Works great on my development machine. On a test machine I get the "error -2147024894 (80070002) Automation Error System can't find the specified file" msg when I run the Access application. When in design view the dll is referenced and all the objects and properties show up in the vba ide. I am wondering if I am using the wrong regasm to register the dll? I develop on a 64 bit machine using VS 2010. I

问题 I have a COM dll which I was using in my .net project through interop referance. Now I got a requirement to move this COM component to another remote machine and create instance there.(kind of out of machine similar to out of process, probably this is remoting, i don't know :-)) What I have done was created a new COM+ applciation in server machine. Added this component inside this app. This is how it is listed in COM+ interface on server. Exported this app as proxy insatller and installed in

问题 I'm trying to register an x64 COM server dll for use in x64 office on x64 windows 7. I have followed the instructions here but I cannot register the dll. When I attempt to I get the following error: The command I use is regsvr32 my_x64_com_server.dll Why is this happening and is there a workaround? Thanks in advance. 回答1: How is the command being run? From a process or from a command line? Make sure the command is being run from a 64-bit process (or a 64-bit cmd.exe console window). Otherwise

问题 I'm writing a VBA function in Microsoft Access to Encrypt / Decrypt text data using RSA keys. The following works currently: CreateObject("System.Security.Cryptography.RSACryptoServiceProvider") CreateObject("System.Text.UTF8Encoding") but this is not working: CreateObject("System.Convert") I did some research and came across this stackoverflow question: Can I call a static method of a C# class from VBA via COM? So as it turns out, System.Convert is a static class so therefore it is