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Returns the identifier of the current window.
Each window is assigned a number-either 1 or 2. &ZWINDOW returns the number of the window under which the NCL process is executing.
Example: &ZWINDOW
&IF &ZWINDOW = 2 &THEN +
&GOTO .SECOND-WIND
Note: The SPLIT and SWAP commands is used to open a second window. The window number is displayed on the supplied primary menu.
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