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Just now I went online and found another beautiful article with all the images. That's great... What theoretical knowledge of COM must be mastered when using VC for COM programming? I have seen a lot of people learn about com. After reading a book, I feel that I have a better understanding of the principles of

Original article: http://www.codeproject.com/Articles/14117/COM-in-plain-C-Part-4 Use C to construct COM objects with multiple interfaces Download routine-194kb Content Embed sub-objects in our objects How the application obtains the Base Object How can an application obtain sub-objects through a base object? How can an application obtain another sub-object from a child object? How the application ob

, iid_iactivedesktop, (void*) pactivedesktop); if (FAILED(hr)) { printf("Create activedesktop failure:0x%08x\n",hr); return -1; }2.1 Call the SetWallpaper method to set the desktop wallpaper. uses_conversion; hr=pactivedesktop-setwallpaper( a2w("F:\\My Documents\\My pictures\\xinsrc_55203051817196711110236.jpg "), 0); if (FAILED(hr)) { printf("SetWallpaper failure:0x%08x\n",hr); return -1; }2.2 Call the ApplyChanges method to apply the current settings. hr=pactivedesktop-applychang

If you are an active Server page (ASP) developer, it is believed that you may often use COM objects to create ASP pages. Even when you use it, you ignore that he is a COM object. For example: ADO. The only component with the highest call rate is the ability to extend unlimited functionality to your page. However, the ASP itself is an interpretative script that is not functional enough to

These days friends and classmates say he encountered a problem when COM invoked the WCF service using service tokens, that is, the SOAP message he returned was greater than the default value of the Wshttpbinding of 65536, raising the call error. You need to change the maxreceivedmessagesize to a value that can hold large message content. The default wshttpbinding is used in the previous three articles, so t

and support speech recognition and speech synthesis. The general operating system installs this component by default, and users should not worry about not having this component. If your system deletes this component, you can go to http://microsoft.com/msagent/downloads.htm.1, first is to create metadataThe Microsoft agent control is installed by default in the%systemroot%\msagent\ directory, and we can first navigate to this directory from the Visual Studio.NET Command prompt menu item in the S

We introduced the service tag using the MEX contract to invoke the WCF service in COM in such a way that it is convenient to obtain metadata dynamically through the MEX endpoint, but sometimes the metadata of the service may contain sensitive information about the application that a malicious user can exploit. This means that some services may not publish metadata information through Mex for security reason

Summary This article describes the use of VC + + ATL (Active Template Library), using the IDTExtensibility2 interface to add a simple COM plug-in (addin) to Microsoft Word, Adding visual parts, such as toolbar buttons and menus, and adding a way to respond to events, and at the end of the paper, provides a simple way to implement a hybrid programming with Office macros. When it comes to office-related pro

some common problems in using COM components (or ActiveX controls) in Web pages 1. Insert controls on the page The easiest and most common way to invoke an ActiveX plug-in in an HTML page is to: The id attribute, like the ID of other elements in HTML, is the unique identifier of each element in the DOM tree. The ClassID attribute is a very critical attribute here, and it is through him that IE can corre

)); swprintf (Szlnkname, L"%s", fd.cfilename); if (0 = = wcscmp (WCSRCHR (szlnkname, L'. '), pszlnkname)) { swprintf (Szlnkpath, L"%s//%s", szpath, Szlnkname); AfxMessageBox (CString (Szlnkpath)); //parselnk2path (Szlnkpath); } } Penum->release (); Pfolder->release (); } The corresponding absolute path is obtained by the program's LNK path BOOL Parselnk2path (lpcwstr pszlnkname) { :: CoInitialize (NULL); ishelllink* Pshell = NULL; ipersistfile* pFile = N

from beginning to end. The traversal method is illustrated in Example 8: Example 8 For all Object in Collection Next Object Note that the syntax in this traversal method is not applied as in the example. This is because a traversal method is a special case where Visual Basic allows you to start using the for next declaration. Default method or Property A method or property is the default property that a COM