How can I allow single instance of a program?

[don_AC64]

I have a macro like this:

:run "C:\WINDOWS\explorer.exe"

How can I allow only a single instance of this window (single instance of the window created by explorer.exe, not of the macro), so that next time I will execute this macro, it will open the window already created, instead of creating a new instance of explorer.

[Gintaras]

Specify the window in the Run Program dialog.

[don_AC64]

I have seen this example on Quick Macros help:

run "notepad" "" "" "" 0 "Notepad"

But the problem is that the title of the windows created by explorer.exe varies, according to the folder that is opened

[Gintaras]

Use "+ExploreWClass" or "+CabinetWClass".

[don_AC64]

WOW!
Very cool!