Stop Multiple Copies From Running

Hi All,

I'm having a small issue, I know this is likely something simple but I cant seem to wrap my head around it.

I have made a small program to connect to a database and pull some simple information. However I'm having problems when users decide to click the program twice. In which case the program loads up twice which I don't want.

The Problem I have is when I try to use ProcessExists It will always kill the one that I just opened even if its the only one in use. Which makes perfect sense, I imagine I need to do something with comparing PIDs or such but i'm really stumped on how to

The code below is the code I have at the top of the script.

If ProcessExists("connectdb.exe") Then
    Msgbox(1, "Error", "Something Went Wrong")
    Exit
EndIf

Any help will be much Appreciated.