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How to make sure that an Application is Running and Installed

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When you create a Visual Basic 2010 or generally a VB.Net application that relies on another VB.Net application for example an Updater.exe application, you will have to code both sides in order no to enable the user to run Updater.exe without the existence of the Main application, and in order to do so, you will have to make sure that :

1. Your Main application is Running.
2. Your Main application is Installed.
3. Your Main application does exist in the installation folder.

After making sure of all the above points, then you can compile your updater.exe file with your Main Application knowing that updater.exe won't run alone, especially if you're sending updates to the Main application for the user to receive using Updater.exe.

Here are the Codes to do so

1) VB 2010 Get list of all installed applications

Github Gist

'Visual Basic Online Course
'VB 2010 Make sure application is installed
Imports Microsoft.Win32
Public Class Form1
   Private Sub Form1_Load(sender As System.Object, _
   e As System.EventArgs) Handles MyBase.Load
      GetInstalledApps(ListBox1)
   End Sub
   Function GetInstalledApps(ilst As ListBox) As String
      Dim DestKey As String = _
      "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\"
      For Each App As String In _
      Registry.LocalMachine.OpenSubKey(DestKey).GetSubKeyNames
         ilst.Items.Add(App)
      Next
      Return ilst.Items.ToString
   End Function
End Class

2) VB 2010 Get list of all running applications

Guthub Gist

  'Visual Basic Online Course
'VB 2010 Get list of all running applications
Function GetAllRunningApps(ilst As ListBox) As String
      'For every process which is running on the computer
      For Each p As Process In Process.GetProcesses
         'If it doesn't have a title
         If p.MainWindowTitle <> String.Empty Then
            ilst.Items.Add(p.ProcessName)
         End If
      Next
      Return ilst.Items.ToString
   End Function

3) VB 2010 Make sure application exists

Github Gist

'Visual Basic Online Course
'VB 2010 Make sure a file exists

   Function AppExists() As Boolean
      Dim AppPath As String = ("C:\folder\sample\app.exe")
      If IO.File.Exists(AppPath) = True Then
         Return True
      Else
         Return False
      End If
   End Function

📥 download VB 2010 Project (MediFire)

By implementing these checks, you ensure that Updater.exe operates only when the main application is present and active, maintaining the integrity of your update process.

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