Returns the visible child in a tab-layout.
capi
tab-layout-visible-child tab-layout => result
tab-layout-visible-child
tab-layout
A tab-layout.
result
A pane.
The function tab-layout-visible-child returns the currently-visible pane in a tab-layout.
tab-layout Tab layouts
CAPI User Guide and Reference Manual (Windows version) - 3 Aug 2017