capGetAudioFormat macro (vfw.h)

Article
10/05/2021

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

Syntax

void capGetAudioFormat(
   hwnd,
   s,
   wSize
);

Parameters

hwnd

Handle to a capture window.

s

Pointer to 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 value

None

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.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	vfw.h