Bubble and tooltip help - %bh and %th
%bh takes an INTEGER argument that is a control variable. When this variable is
non-zero, help text is supplied in the form of a "bubble" whenever the mouse
cursor lies over the control in question. To enable users to switch such help on
and off, simply supply a button with a call-back function that changes
the integer control variable.
hlp='Toggle bubble help On/Off'
c--- Define a button with help attach the help ---
c--- string with an @ symbol ---
INTEGER FUNCTION toggle()
A grave accent can be added to %bh. This has the effect of generating a short
delay before the help bubble appears.
%th is used as an alternative to %`bh. %th provides a help bubble in the form of