Execute programs in more documnts simultaneously?

I have MDIForm1 and Form1 as child in vb6
If I open two documents and click on the buttons to execute the program in one and in the other, the program is executed in active form1 and the other waits. If another form1 Set Active then it continues to execute in the first standing.
Can the software be run simultaneously in both form1?
In fact I saw in other programs that may or may not know how :)

You'd need to launch a new thread, which isn't very straight-forward in VB6. Or, create a separate executable, and launch that. You may also be able to put the window inside your MDI.