Arguments: dialog-item &optional box erase-p
Tells the operating system to invalidate part or all of a component
window, so that the operating system will tell the window to redraw
itself after all other message processing has completed. If box is
nil, then the entire window is invalidated;
otherwise box should be a box in the component window's own coordinate
system (0,0 refers to the interior top left of the component), and
only that portion of the component window will be invalidated. If
erase-p is true, then the operating system will be told to erase the
invalidated region before it sends the message to the window to tell
its event handler to redraw it.
The more general function invalidate is now recommended over most of the invalidate-* functions.
Common Graphics and IDE documentation is described in About Common Graphics and IDE documentation in cgide.htm.
The documentation is described in introduction.htm and the index is in index.htm.
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