<div>
How to terminate the program then?
</div>


<div>
app.previnstance checks to see if itself is running, then if it is, end kills it<br />
<br />
if &nbsp; app.previnstance &nbsp; then &nbsp; end<br />
if (program is running) then (quit)
</div>


app.previnstance checks to see if itself is running, then if it is, end kills it

if   app.previnstance   then   end
if (program is running) then (quit)

<div>
<div class="content wysiwyg-content">
I have a application, and I don't want user to start the same program with two instance. <br />
How do I detect there is a instance already running?
</div>
</div>


I have a application, and I don't want user to start the same program with two instance. 
How do I detect there is a instance already running?

How to make sure only one process running?

Visual Basic is Microsoft’s event-driven programming language and integrated development environment (IDE) for its Component Object Model (COM) programming model. It is relatively easy to learn and use because of its graphical development features and BASIC heritage. It has been replaced with VB.NET, and is very similar to VBA (Visual Basic for Applications), the programming language for the Microsoft Office product line.