The MulDiv function multiplies two 32-bit values and then divides the 64-bit result by a third 32-bit value. The return value is rounded up or down to the nearest integer.
int MulDiv(
int nNumber, // 32-bit signed multiplicand
int nNumerator, // 32-bit signed multiplier
int nDenominator // 32-bit signed divisor
);
If the function succeeds, the return value is the result of the multiplication and division. If either an overflow occurred or nDenominator was 0, the return value is –1.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in winbase.h.
Import Library: Use kernel32.lib.
Large Integer Operations Overview, Large Integer Operations Functions, Int32x32To64, UInt32x32To64