leIsLayoutViewerWindow

leIsLayoutViewerWindow(
w_windowId
) 
=> t / nil

Checks whether the given window has layout viewer application installed on it.

w_windowId

Window ID of the window.

`t`	The w_windowId has layout viewer application installed.
`nil`	The w_windowId does not have the layout viewer application installed.

Returns t if the window winId has layout viewer application installed on it.

leIsLayoutViewerWindow(winId)