Autohotkey: Send Key to inactive Window

Question

Im using Chrome and wanting to send a Key to Edge. This function does not work in the inactive window. Instead it presses the key in the active window, which is wrong. How can i fix this?

F1::
Heal()
{
    WinActivate , xxx - Profil 1 – Microsoft Edge
    Send {3}
    WinActivate , xxx - Google Chrome
}

BTW: ControlSend is not an option.