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capSetCallbackOnStatus macro (vfw.h)

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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

void 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

None

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