WM_CAP_GET_AUDIOFORMAT

	Overview

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	Quick Info

The WM_CAP_GET_AUDIOFORMAT message obtains the audio format or the size of the audio format. You can send this message explicitly or by using the capGetAudioFormat and capGetAudioFormatSize macros.

wParam = (WPARAM) (wSize);

lParam = (LPARAM) (LPVOID) (LPWAVEFORMATEX) (psAudioFormat);

Parameters
wSize

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

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.

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
capGetAudioFormat, capGetAudioFormatSize, WAVEFORMATEX

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