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EngMulDiv function (winddi.h)

  • Article

The EngMulDiv function multiplies two 32-bit values and then divides the 64-bit result by a third 32-bit value.

Syntax

int EngMulDiv(
  [in] int a,
  [in] int b,
  [in] int c
);

Parameters

[in] a

Specifies the 32-bit signed multiplicand.

[in] b

Specifies the 32-bit signed multiplier.

[in] c

Specifies the 32-bit signed divisor by which the result of a*b is to be divided.

Return value

EngMulDiv returns the signed 32-bit result of the multiplication and division. The return value is rounded up or down to the nearest integer.

Remarks

Drivers should not pass a zero divisor to EngMulDiv.

Requirements

Requirement Value
Minimum supported client Available in Windows 2000 and later versions of the Windows operating systems.
Target Platform Universal
Header winddi.h (include Winddi.h)
Library Win32k.lib
DLL Win32k.sys