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CDC::ScaleWindowExt 

Modifies the window extents relative to the current values.


virtual CSize ScaleWindowExt(
   int xNum,
   int xDenom,
   int yNum,
   int
yDenom );

Parameters

xNum

Specifies the amount by which to multiply the current x-extent.

xDenom

Specifies the amount by which to divide the result of multiplying the current x-extent by the value of the xNum parameter.

yNum

Specifies the amount by which to multiply the current y-extent.

yDenom

Specifies the amount by which to divide the result of multiplying the current y-extent by the value of the yNum parameter.

The previous window extents (in logical units) as a CSize object.

The formulas are written as follows:

xNewWE = ( xOldWE * xNum ) / xDenom
yNewWE = ( yOldWE * yNum ) / yDenom

The new window extents are calculated by multiplying the current extents by the given numerator and then dividing by the given denominator.

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