WM_CAP_GET_AUDIOFORMAT message
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.
WM_CAP_GET_AUDIOFORMAT
wParam = (WPARAM) (wSize);
lParam = (LPARAM) (LPVOID) (LPWAVEFORMATEX) (psAudioFormat);
Parameters
-
wSize
-
Size, in bytes, of the structure referenced bys.
-
psAudioFormat
-
Pointer to a WAVEFORMATEX structure, or NULL. If the value is NULL, the size, in bytes, required to hold the structure is returned.
Return Value
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] |
| Header |
|