How to resolve the algorithm Determine if only one instance is running step by step in the BBC BASIC programming language

Published on 12 May 2024 09:40 PM
#Bbc basic

How to resolve the algorithm Determine if only one instance is running step by step in the BBC BASIC programming language

Table of Contents

Problem Statement

This task is to determine if there is only one instance of an application running. If the program discovers that an instance of it is already running, then it should display a message indicating that it is already running and exit.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Determine if only one instance is running step by step in the BBC BASIC programming language

Source code in the bbc programming language

      SYS "CreateMutex", 0, 1, "UniqueLockName" TO Mutex%
      SYS "GetLastError" TO lerr%
      IF lerr% = 183 THEN
        SYS "CloseHandle", Mutex%
        SYS "MessageBox", @hwnd%, "I am already running", 0, 0
        QUIT
      ENDIF
      
      SYS "ReleaseMutex", Mutex%
      SYS "CloseHandle", Mutex%
      END

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