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
);
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero.
Windows NT: To get extended error information, call GetLastError.
The window extents are modified as follows:
xNewWE = (xOldWE * Xnum) / Xdenom
yNewWE = (yOldWE * Ynum) / Ydenom
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in wingdi.h.
Import Library: Use gdi32.lib.
Coordinate Spaces and Transformations Overview, Coordinate Space and Transformation Functions, GetWindowExtEx, SIZE