UInt32x32To64 macro (winnt.h)

Multiplies two unsigned 32-bit integers, returning an unsigned 64-bit integer result. The function performs optimally on 32-bit Windows.

Syntax

LONGLONG Int32x32To64(
  [in]  LONG a,
  [in]  LONG b
);

Parameters

[in] a

The first unsigned 32-bit integer for the multiplication operation.

[in] b

The second unsigned 32-bit integer for the multiplication operation.

Return value

Type: LONGLONG

The return value is the signed 64-bit integer result of the multiplication operation.

Remarks

This function is implemented on all platforms by optimal inline code: a single multiply instruction that returns a 64-bit result.

Please note that the function's return value is a 64-bit value, not a LARGE_INTEGER structure.

Requirements

Requirement	Value
Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Target Platform	Windows
Header	winnt.h (include Windows.h)

See also

Int32x32To64

Large Integers