Windows only.

Determines how Coord 'Pixel' is interpreted. This is determined initially by the value of the DYALOG_PIXEL_TYPE parameter and, when altered by this function, applies to all subsequent GUI operations.

Y is a character vector that is either 'ScaledPixel' or 'RealPixel'. Any other value will cause a DOMAIN ERROR.

The result R is the previous value.

      2035⌶'ScaledPixel'
RealPixel
      2035⌶'RealPixel'
ScaledPixel

      2035⌶'realpixel'
DOMAIN ERROR
      2035⌶'realpixel'
     ∧