You can use the function Shell, included in the namespace Microsoft.VisualBasic.Compatibility.
You also have the option to use System.Diagnostics.Process, if you're using .NET.
Shell()
System.Diagnostics.Process.Start()
EDIT:
You also can import the code of those programs to execute on menu click, or create a .dll and import it in your current project.
You also have the option to use System.Diagnostics.Process, if you're using .NET.
Code:
Shell("Path to programm to execute")
' OR
System.Diagnostics.Process.Start("Path to programm to execute")
Shell()
System.Diagnostics.Process.Start()
EDIT:
You also can import the code of those programs to execute on menu click, or create a .dll and import it in your current project.