ScaleWindowExtEx info  Overview  Group

The ScaleWindowExtEx function modifies the window for a device context using the ratios formed by the specified multiplicands and divisors.

BOOL ScaleWindowExtEx(

HDC hdc,	// handle of device context
int Xnum,	// horizontal multiplicand
int Xdenom,	// horizontal divisor
int Ynum,	// vertical multiplicand
int Ydenom,	// vertical divisor
LPSIZE lpSize	// address of previous window extents
);

Parameters

hdc

Identifies the device context.

Xnum

Specifies the amount by which to multiply the current horizontal extent.

Xdenom

Specifies the amount by which to divide the current horizontal extent.

Ynum

Specifies the amount by which to multiply the current vertical extent.

Ydenom

Specifies the amount by which to divide the current vertical extent.

lpSize

Points to a SIZE structure. The previous window extents (in logical units) are placed in this structure. If lpSize is NULL, nothing is returned.

Return Values

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks

The window extents are modified as follows:

    xNewWE = (xOldWE * Xnum) / Xdenom 

    yNewWE = (yOldWE * Ynum) / Ydenom 

 

See Also

GetWindowExtEx, SIZE