Sets the input focus to a pane.
capi
set-pane-focus pane
pane
An instance of a subclass of simple-pane or choice.
The function set-pane-focus sets the input focus to pane or one of its children.
set-pane-focus
pane-has-focus-p Focus
CAPI User Guide and Reference Manual (Windows version) - 3 Aug 2017