DWordPtrSub function (intsafe.h)

Subtracts one value of type DWORD_PTR from another.

Syntax

HRESULT DWordPtrSub(
  [in]  DWORD_PTR dwMinuend,
  [in]  DWORD_PTR dwSubtrahend,
  [out] DWORD_PTR *pdwResult
);

Parameters

[in] dwMinuend

Type: DWORD_PTR

The value from which dwSubtrahend is subtracted.

[in] dwSubtrahend

Type: DWORD_PTR

The value to subtract from dwMinuend.

[out] pdwResult

Type: DWORD_PTR*

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.

Requirements