My first VB6 project!

but my first very big prob!

I have compiled my project with name MYPrg.exe.

Now if a user re-click on the icon "MYPrg" the user open twice the app!!!!

Is possible if the application MYPrg.exe is already opened, appear a Msgbox (Attention the application is alredy run on this PC)...
How to?