The following VB.NET program allows to start multiple calculator applications and later it kill the same instances of all calculator applications.
The Process component is a useful tool for starting, stopping, controlling, and monitoring applications. A process is a running application and a thread is the basic unit to which the operating system allocates processor time. Using the Process component, you can obtain a list of the processes that are running, or you can start a new process.
GetProcessesByName(String) - Creates an array of new Process components and associates them with all the process resources on the local computer that share the specified process name.
Dim _proceses As Process()_proceses = Process.GetProcessesByName("calc")
The above syntax retrieve all the process associated with "calc" application in the _proceses array. System.Diagnostics provides access to local and remote processes and enables you to start and stop local system processes.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
System.Diagnostics.Process.Start("calc")
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim _proceses As Process()
_proceses = Process.GetProcessesByName("calc")
For Each proces As Process In _proceses
proces.Kill()
Next
End Sub
End Class