capGetAudioFormat

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The capGetAudioFormat macro obtains the audio format. You can use this macro or explicitly call the WM_CAP_GET_AUDIOFORMAT message.

DWORD capGetAudioFormat(

hwnd,
psAudioFormat,
wSize
);

Parameters
hwnd

Handle of a capture window.

psAudioFormat

Address of a WAVEFORMATEX structure, or NULL. If the value is NULL, the size, in bytes, required to hold the WAVEFORMATEX structure is returned.

wSize

Size, in bytes, of the structure referenced by s.

Return Values
Returns the size, in bytes, of the audio format.

Remarks
Because compressed audio formats vary in size requirements applications must first retrieve the size, then allocate memory, and finally request the audio format data.

See Also
WAVEFORMATEX, WM_CAP_GET_AUDIOFORMAT

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