capSetCallbackOnStatus macro (vfw.h)

The capSetCallbackOnStatus macro sets a status callback function in the application. AVICap calls this procedure whenever the capture window status changes. You can use this macro or explicitly call the WM_CAP_SET_CALLBACK_STATUS message.

Syntax

BOOL capSetCallbackOnStatus(
     hwnd,
     fpProc
);

Parameters

hwnd

Handle to a capture window.

fpProc

Pointer to the status callback function, of type capStatusCallback. Specify NULL for this parameter to disable a previously installed status callback function.

Return value

Type: BOOL

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

Remarks

Applications can optionally set a status callback function. If set, AVICap calls this procedure in the following situations:

• A capture session is completed.
• A capture driver successfully connected to a capture window.
• An optimal palette is created.
• The number of captured frames is reported.

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

Creating a Status Callback Function

Video Capture

Video Capture Macros