active|activex| resolution csharp Tips: Strong name When referencing activex/com components select from Mittermeyer Blog Problem Dotnet platform provides a relatively complete class library, but the first version is never exhaustive, and due to historical problems, often with Com/activex components interoperability. The problem with the author is to call an object in Excel in a assembly, but the Assembly n
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
The knowledge points in this chapter are listed below, which are not sorted out and extended.
1. com interfaces are implemented using purely abstract base classes in C ++. a com component can provide multiple interfaces, A c ++ class can use multiple inheritance to implement a component that can provide multiple interfaces.
2. functions marked with _ stdcall will use the standard call Convention, that is,
Label: style blog HTTP color ar strong SP 2014 ArtDuring serial port testing, the serial port is used to unplug the printer and replace it with the test. When the program is opened, an error is prompted: the given port name does not start with COM/COM or does not resolve to a valid serial port. (The given port name does not start with COM/
There are many ways to set up your wallpaper, you can call SystemParametersInfo, modify the registry, and you can do so through the IActiveDesktop interface provided by the Windows shell. The IActiveDesktop interface is a COM interface that needs to be used in a way that calls COM components.This explains how COM is used by applying the IActiveDesktop interface.
1, the role of COM
As a software model, COM provides the standard of communication between programs, but its greatest contribution lies in the change of programming method. COM combines both object technology and component technology. Object characteristics make application system design and implementation more in line with the face of the real world; Component
Java. lang. NoClassDefFoundError: com/sun/mail/util/LineInputStream java. lang. NoClassDefFoundError: com/sun/activation/registries/LogSupport
NoClassDefFoundError: com/sun/mail/util/LineInputStream
NoClassDefFoundError: com/sun/activation/registries/LogSupport
Cause: the method in mail. jar conflicts with the metho
Failed to retrieve components whose CLSID is {00024500-0000-0000-C000-000000000046} in the COM class factory. com component clsidFailed to retrieve components whose CLSID is {00024500-0000-0000-C000-000000000046} in COM class factory
When exporting data to an Excel file in the project, the following error occurs: 80070005 when the component whose CLSID is {000245
Tags: blog HTTP use for 2014 problem log time applicationCLR cannot convert from com context 0x208f68 to com context 0x2090d8, which has lasted 60 seconds. The thread with the target Context/unit is likely to execute a non-pump wait or process a very long operation without sending a Windows message. This usually affects the performance, and may even cause the application to not respond or the memory used to
32-bit COM components developed by. NET and C ++ are often included in a large application.ProgramGroup. However, after being deployed to a Windows 64-bit system, the error "retrieving CLSID 80040154 of com-class factory components" may occur.
The solution is as follows:
In the. NET project, right-click the project and choose Properties to open the project property configuration page:
After the code
Construct a minimum framework structure for creating COM components, and then take a look at the internal processing process.
Iunknown * punk = NULL;Iobject * pobject = NULL;Coinitialize (null );Cocreateinstance (clsid_object, clsctx_inproc_server, null, iid_iunknown, (void **) punk );Punk-> QueryInterface (iid_iojbect, (void **) pobject );Punk-> release ();Pobject-> func ();Pobject-> release ();Couninitialize ();
This is a typical framework for cre
First, implement Ismiplemath,iadvancedmath interface and DllGetClassObject ()
1.1 Implement Ismiplemath and Iadvancedmath interface
Let's change the original Cmath class (Cmath is actually "COM technology (ii) COM basics" of that Cmath Class) to implement Ismiplemath interface and Iadvancedmath interface.
The modifications are as follows:
1) Math.h File/*@**#---2003-10-29 21:33:44 (tulip)---#**@ #includ
Last night, I was so tired that I was so bored that I was always confused when I got the result for three or more nights: I was unable to create objects by calling C # exported class libraries using vc6, And I used VB to do the same. Re-examine the interface definition and consciously regulate it. How can this problem be solved?Looking at the framework design guide, I suddenly found the following sentence:
If there is no common default constructor (constructor without parameters), the
Program
In the previous chapters we have seen several run-time features that COM + provides that simplify the development of distributed components that can be used to create scalable, maintainable ASP applications. MTS introduced the transaction model first, and its design simplifies the development of component-based Distributed transaction processing system. As an inheritor of MTS, COM + enhances and exp
Say in front
COM This word we listen to a lot of, it is what it is, whether it has practical value. If it works for us, then how to write COM components in Visual FoxPro. The author will stand on the position of Visual FoxPro developers, with you to discuss the above issues, I hope to help you. Perhaps this is a domestic difficult to see the article about Visual FoxPro and
Object | Transformation run Environment: Visual Studio.NET Beta2, VC7, C #
References: MSDN
Level: Entry level
First, the preface
COM component objects are completely different from. NET class objects, but to make a COM client call a. NET object like a COM component, the. NET program
Like to use. NET objects using COM
is COM technology out of date? That's not true either. Technically, it is true that COM usage is declining, but intellectually, the idea of COM's interface-oriented is being carried forward by Java and. Net. So we still need to deal with COM. It depends on the area of your work. Although now Microsoft's platform is slowly toward. Net migration,
The. NET Framework reusable software is not a new concept. For eight of years, people have been using various forms of Component object models (COM). It turns out that it is the most successful reusable software model. COM introduces the concept of "component"-a reusable block of code that can be combined to combine the functions of multiple independent functions to extend to applications such as Microsoft
". NET support COM? "
"How do COM + and MTS exist on. NET?" "
". What is the difference between a net component and a COM component? "
COM + is still present in. NET, and if the application does need to use COM + and MTS features, then you can choose the appropriate techn
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.