SetDialogTrackCursor
Boolean tracks; true if there is an edit field to be tracked. edit line in the dialog, and it should track and change to an I-Beam cursor when
over the edit line in the dialog.
theDialog dialog whose default item is being set.
tracks true if there is an edit item in the dialog to be tracked.
Notes: This routine is not yet documented in any MPW header file (hence, it is not
in any THINK C or THINK Pascal header file either). The information given
above comes from Macintosh Technical Note #304. This tech. note also gives
the inline glue for the call as follows:
Boolean tracks) = {0x303C,0x0306,0xAA68};