ISWINDOW

Purpose:

Returns 1 if input parameter is a Window.

ISWINDOW(val)

val

A series, scalar or string value to test.

1 if the input is a window or window reference, else 0.

iswindow(W1)

returns 1

iswindow(W1 + 1)

returns 0 because the input is a series and not a window.

win = refwindow(w1)

iswindow(win)

returns 1 because the input refers to a window.

If the input is not a window or a window reference, iswindow returns 0.