The DXVADDI_FREQUENCY structure describes the video frame rate in Hertz (Hz). For example, NTSC TV is 60000 over 1001.

## Syntax

```
UINT Numerator;
UINT Denominator;

```

## Members

Numerator

[in] The numerator of the frequency fraction.

Denominator

[in] The denominator of the frequency fraction.

## Remarks

The user-mode display driver must interpret the video frame rate for the following special cases as indicated:

• Numerator/Denominator = 0/0 is interpreted as an unknown frequency.

• Numerator/Denominator = n/0, where n is any number, is interpreted as invalid.

• Numerator/Denominator = 0/n is interpreted as zero frequency.

## Requirements

 Version Available in Windows Vista and later versions of the Windows operating systems. D3dumddi.h (include D3dumddi.h)