
Windows NT introduced the concept of a long running application called NT Services (now called Windows Services). These are usually applications that run in the background and provide services to client applications. Under Windows NT, writing a service was much more difficult that writing a simple application. Further, since services were multithreaded, it was not easy writing a service in VB. You would have to write the functionality in VB and encapsulate that within a C++ wrapper. However..
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