Microsoft Foundation Classes (mfc.hlp) (Table of Contents; Topic list)
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CDC::ScaleViewportExt
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──Microsoft Foundation Classes──────────────────────────────────────────────
 
  CSize ScaleViewportExt( int xNum, int xDenom, int yNum, int yDenom );
 
  Parameter   Description
 
  <xNum>      Specifies the amount by which to multiply the current
              x-extent.
 
  <xDenom>    Specifies the amount by which to divide the current
              x-extent.
 
  <yNum>      Specifies the amount by which to multiply the current
              y-extent.
 
  <yDenom>    Specifies the amount by which to divide the current
              y-extent.
 
  Remarks
 
  Modifies the viewport extents relative to the current values. The
  formulas are written as follows:
 
  xNewVE = ( xOldVE * xNum ) / xDenom
  yNewVE = ( yOldVE * yNum ) / yDenom
 
  The new extent is calculated by multiplying the current extents by the
  given numerator and then dividing by the given denominator.
 
  Return Value
 
  The previous viewport extents (in device units) as a ◄CSize► object.
 
  See Also
 
  ◄::ScaleViewportExt►
 
 
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