Very funny. Thanks!

use ChangeServiceConfig() with required dwStartType.

Ok, I interpret this as you spawn a thread inside your ActiveX component and try to fire an event from there. Your ActiveX is presumably running in an STA, Single Threaded Apartment. An STA can only have one single thread running inside it, if you create another thread you have to set up another apartment. This is done by calling ::CoInitialize[Ex]() in the thread. To be able to use the source interface you fire the events on you have to marshal that interface to the new apartment. Whenever you cross apartment boundaries with an interface you have to marshal the interface. This can be done with ::CoMarshalInterThreadInterfaceInStream() / ::CoGetInterfaceAndReleaseStream() or through the GIT (Global Interface Table). Have a look at Lim Bio Liong's article serie startnig here[^] for more info. "It's supposed to be hard, otherwise anybody could do it!" - selfquote "High speed never compensates for wrong direction!" - unknown

thanks for your help paresh, but, my project is AcriveX in Visual C++ 6 , and I create my method by classwizard, in classwizard type parameters is limited by combobox and have not this type ("[out,retval] long* out1") but I write this type manual and build my project , VC6 give error syntax error : '[' regards

I have gwiopm.sys file get from internet and with this .sys file can use in / out asm command and sent data to parallel port from application Win32 , now i want send my data to parallel port from windows X64.

See here[^] WhiteSky

hameduser wrote: I didn't work with Socket APIs as yet , let me know if you have any samples or guide me anyway . You'd need to understand sockets to use CAsyncSocket as well. Here's the Microsoft documentation: Windows Sockets 2[^] Here's links to many articles: CP Search Articles[^] Mark