Label, definition of Topic is solved

[joefiesta]

A hotkey is a label. While the LABELs help section does not state so EXPLICITLY, it does put it thusly:

Hotkey and hotstring labels are also valid targets for Goto, Gosub and other commands.

Before that Label says:

A label identifies a line of code, and can be used as a Goto target or to form a subroutine.

LabelName:

To create a label, write the label name followed by a colon as shown above. Aside from whitespace and comments, no other code can be written on the same line.

The last proviso is incorrect, inasmuchas it does not apply to a one-line hotkey defintion, for example:
MyHotkeyLabel:: msgbox Hi Joe

[Ragnar]

I will replace a part of the label description with that of https://www.autohotkey.com/docs/Language.htm#labels, which is more accurate.

[joefiesta]

appreciated ! thanks