Most of the Windows apps are active after I open them, but PD needs to be activated with a mouse for keyboard to become functional. This is very inconvenient if I have automated installation with no monitor. I need Keyboard buttons to control some parameters without monitor, at least turn a PD patch on/off with keyboard only.

Is there any solution, workaround or . . . ?

@Transcend To focus the window put this in your patch.........

..... where "test_popups.pd" is replaced by the name of the patch.
It works in Windows, and hopefully for other os's.... where a simple [vis 1( message fails to focus the window at load time.
Putting a [delay] between [loadbang] and the message might help if it fails.

Then [key] [keyup] etc. will work, although you probably need a window manager active even without a screen, as keyboard messages are always sent to the active window (as you have found...!)
David.

The funniest part is, PD complains "my-patch. pd: no such object", but the window is activated

@Transcend Did you put [pd-nameofmypatch.pd editmode etc.?
Also I see that in your post you put a space after the . and before pd but I imagine you did not do that in the message.
David.

You are right, I tried it without "pd-".
It work's perfectly. Thank you, David!