capGetAudioFormatSize macro (vfw.h)

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

Syntax

DWORD capGetAudioFormatSize(
     hwnd
);

Parameters

hwnd

Handle to a capture window.

Return value

Type: DWORD

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.

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

See also

Video Capture

Video Capture Macros