window output tag
This statement makes an existing window the current output window. The
current output window is the target window for such statements and
functions as button, textfield,
The tag can be either a
positive or negative number; window output
affects the window whose tag number is
If you specify a negative tag,
the window becomes invisible. If you specify a positive tag,
the window becomes visible.
window output does not
activate the specified window (i.e., it does not highlight its contents
nor bring it to the front), if there are other visible windows open.
Use the window statement
when you want to explicitly activate a window. (Note the window
statement also makes the specified window the current
window output is useful in
cases where you need to update the contents of a window which may be in
the background, without bringing the window to the front.