parentid

String or Num

in

Specifies a parent control to which the button controls of interest are children to. Leave zero if not applicable. See below.

ctlid

String or Num

in/out

ID of the control which should start with the focus. If zero, the first control within the group specified by parentid will start with the focus.

exitcode

Num

in/out

(Signed Num) Returns a code indicating the event received.

opflags

B,4

in

Flags affecting operation.

timer

Num

in

Optional numeric argument which can be set to the number of milliseconds to wait for an event before the eventwait times out with exitcode 11.