on openCard
tabKey
end openCard
The tabKey function places the cursor automatically in the first line of
the first field in the Tab order or a HyperCard stack. If the field is not
empty, the whole text of the first line will be selected.
This script works on all versions of HyperCard from 1.2.5 through 2.1x.
This article is adapted from the Claris Tech Info database.