ULongSub function (intsafe.h)

Subtracts one value of type ULONG from another.

Syntax

HRESULT ULongSub(
  ULONG ulMinuend,
  ULONG ulSubtrahend,
  ULONG *pulResult
);

Parameters

ulMinuend

Type: ULONG

The value from which ulSubtrahend is subtracted.

ulSubtrahend

Type: ULONG

The value to subtract from ulMinuend.

pulResult

Type: ULONG*

A pointer to the result. If the operation results in a value that overflows or underflows the capacity of the type, the function returns INTSAFE_E_ARITHMETIC_OVERFLOW and this parameter is not valid.

Return value

Type: HRESULT

If this function succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Remarks

This is one of a set of inline functions designed to provide arithmetic operations and perform validity checks with minimal impact on performance.

DWordSub is an alias for this function.

Requirements

   
Target Platform Windows
Header intsafe.h