RosettaCodeData/Task/GUI-Maximum-window-dimensions/IWBASIC/gui-maximum-window-dimensio...

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DEF Win:WINDOW
DEF Close:CHAR
DEF ScreenSizeX,ScreenSizeY:UINT
DEF L,T,ClientWidth,ClientHeight:INT
GETSCREENSIZE(ScreenSizeX,ScreenSizeY)
OPENWINDOW Win,0,0,ScreenSizeX,ScreenSizeY,@MAXBOX|@MINBOX|@SIZE|@MAXIMIZED,NULL,"Get client area",&MainHandler
'Left and top are always zero for this function.
GETCLIENTSIZE (Win,L,T,ClientWidth,ClientHeight)
PRINT Win,"Maximum drawing area values: width is"+STR$(ClientWidth)+" and height is"+STR$(ClientHeight)+"."
WAITUNTIL Close=1
CLOSEWINDOW WIN
END
SUB MainHandler
SELECT @MESSAGE
CASE @IDCLOSEWINDOW
Close=1
ENDSELECT
RETURN
ENDSUB
Output: Maximum drawing area values: width is 1280 and height is 749.