How to initialize a IMimeMessage object from IStream
Given an empty MimeMessage created with e.g. MimeOleCreateMessage function, how can I initialize it from an IStream / data buffer, which contains the complete message text? ...
com
Implement prototype-similar functionality for WinForms controls hosted in IE
Hi, I'm using WinForms controls in IE. Something similar to this: var MyControl = new ActiveXObject("MyComponent.MyControl") and I want to be able to use prototype feature for MyControl.: MyControl.prototype.newFunc = function(){alert('hi there');} Is it possible at all? I thought about System.Runtime.InteropServices.Expando, but ...
Best way to access COM objects from C#
I am planning to use various objects that are exposed as COM objects. To make them easier to use, I'd like to wrap them as C# objects. What is the best approach for this? ...
ATL simple object wizard - "Object Xxx already exists" error
I am attempting to create a new COM object in my DLL using the ATL Simple Object Wizard in Visual Studio 2005. I enter the short name for the object, and all of the other fields are derived. However, when I click Next in the wizard, the following error message comes up: Object 'IXxxInterfaceName' already exists I have searched my en...
Is there a COM or .Net SDK for Rational Rose?
Is there a COM or .Net SDK for IBM Rational Rose? I need to access information stored in Rational Rose (that the unisys XMI Export add-in does not expose) - I have tried searching a few times but just kept finding references to the java SDK rather then an SDK for rational rose itself... does anyone know if such a thing exists? Ideally ...
Problem with SafeArray access using CComVariant
Hi, I have following block of code ///////////////////////////////////// CComVariant newVal; //pass the CComVariant and get the strings array!!! GetStrList(newVal); USES_CONVERSION; if (((newVal.vt & VT_ARRAY) == VT_ARRAY) && ((newVal.vt & VT_BSTR) == VT_BSTR)) { SAFEARRAY* paArray = newVal.parray; BSTR * str = NULL; SafeArray...
What's are the naming conventions on COM libraries? When do I choose .ocx, .oca, .tlb, .olb?
EDIT: Since the original wording of my question caused much frowning I re-phrased it. Sorry about the confusion. Until now all my COM DLLs had the extension .dll, but I assume there are some rules about that. I know there are .ocx, .oca, .tlb and .olb files. I'm aware that these files all contain "COM stuff" but what exactly? What are...
Memory leaks in a multi-threaded application using COM & C#
I have written a multi thread unmanaged application which uses COM objects in its worker threads. Everything went fine until I started using .NET objects exported as COM to do the work. Playing around with the code and commenting out parts of the .NET object functionality I managed to pin it down to the usage of COM objects from within...
Using Scripting.Dictionary from C#
I need to pass a Scripting.Dictionary between my C# app and another app. I would like to be able to create instances of and modify the dictionary in my C# app. I know little about Scripting.Dictionary and ActiveX in general. Various forums suggest that I should use functions like System.Type.GetTypeFromProgID() and System.Activator.Crea...
SheetBeforeDoubleClick not working from COM Addin
I'm trying to write a COM add in for Excel in C# that disables the ability to double click a cell and then edit it, I want to popup a box saying that editing a cell this way is prohibited and then stop all execution. Looking through the documentation at Microsoft this seems like a very easy task, you create an Application event AppEvent...
In COM: should I call AddRef after CoCreateInstance?
Does CoCreateInstance automatically calls AddRef on the interface I'm creating or should I call it manually afterwards? ...
How to get the function name from the ordinal number in a COM dll
Hi, I am trying to get actual function names from their ordinal numbers from a COM dll. I tried using dumpbin.exe but it only returns [NONAME] for each ordinal (except the first few). ordinal hint RVA name 21 0 00002439 DllCanUnloadNow 25 1 00007F41 DllGetClassObject 116 2 0000539C DllMain ...
Replacement for #import in Visual C++
We have large C++ project that we used to compile with the /MP switch to take advantage of multiple cores. However, we recently brought in some code that uses #import on a couple of tlb's, and #import is incompatibile with /MP, which means we are back to single threaded builds and a lot more time to get coffee. Any suggestions on how t...
Killing an out of process COM object from C#
I have an out of process COM object that we are calling from C# using dllhost (we were unable to use COM+). This works great, and I have my own pool of objects that I can use whenever I want. The COM object will be reused many times and is long running (> 20 minutes sometimes). Unfortunately, this is an old VB ActiveX dll that occasional...
Setting Accept-Language in COM-embedded IE
I have an IE instance embedded in my C application using COM. With IWebBrowser2.Navigate I can pass headers to be sent along with the request, except apparently "Accept-Language". It seems the language settings from IE itself always override the value I pass in for that header. Is there any way around this? ...
Sending data through Com port in windows mobile (compact framework)
I need to have a virtual com port created so that when the device(windows mobile) usb port is connected to Tracking box serial port has the lead put into it a com port is added to the device. I want to sends the data via the com port using gprs to a specified address and port number that we set in the tracking box ...
Pointer to a MFC dialog class
Hello, Can someone please guide me on how to pass the reference pointer to the dialog class so that it can call DoModal? e.g. EditorSvr.cpp -- implementation of the interface class (which is also located in a DLL) CDialogClass1.cpp -- Dialog class that will receive the pointer from EditorSvr.cpp I tried to search the whole google bu...
Using a C++ header with .NET language
I trying to use a ".h" file from Windows SDK in a .NET language (maybe C#), but without success. This header exposes some Windows Media player functionality through COM. If I use Win32 C++, I can use it with no problems, so I thought that I could use Managed C++ as a "Bridge" to expose it to C#. The header file is the subscriptionservic...
Why do I keep getting "Must declare the Scalar variable "@Param1"" when performing a parameterized query in C++ using ADO?
Here is the code. A Few notes about it. DStr is an string class that is internal to our company. It functions much like CString. I can connect to the database and run non-parameterized queries. Also this insert works fine if I do not use parameters. The cmd->Execute statment throws an exception. This is where I am getting the error...