Quick Info


The WM_CAP_SET_CALLBACK_WAVESTREAM message sets a callback function in the application. AVICap calls this procedure during streaming capture when a new audio buffer becomes available. You can send this message explicitly or by using the capSetCallbackOnWaveStream macro.


wParam = (WPARAM) 0;

lParam = (LPARAM) (LPVOID) (fpProc);



Address of the wave stream callback function. Specify NULL for this parameter to disable a previously installed wave stream callback function.

Return Values

Returns TRUE if successful or FALSE if streaming capture or a single-frame capture session is in progress.


The capture window calls the procedure before writing the audio buffer to disk. This allows applications to modify the audio buffer if desired.

If a wave stream callback function is used, it must be installed before starting the capture session and it must remain enabled for the duration of the session. It can be disabled after streaming capture ends.

See Also


Software for developers
Delphi Components
.Net Components
Software for Android Developers
More information resources
Unix Manual Pages
Delphi Examples
Databases for Amazon shops developers
Amazon Categories Database
Browse Nodes Database