You can use NAME clause to get regerence to the window object

DEFINE WINDOW _preview AT 0, 0 SIZE 1,1 IN DESKTOP CLOSE GROW SYSTEM FLOAT NAME _oPreview
_oPreview.WindowState = 2
_oPreview.Show()

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>I'm trying to set up a desktop window using all available screen size starting from just below the app toolbar:
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>DEFINE WINDOW _preview FROM 0, 0 TO _SCREEN.height, _SCREEN.width IN DESKTOP CLOSE GROW SYSTEM FLOAT
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>Can anyone tell me how to best calculate the FROM and TO parameters?
>
>Thanks,
>Vidar