WM_CAP_SET_CALLBACK_ERROR

The WM_CAP_SET_CALLBACK_ERROR message sets an error callback function in the client application. AVICap calls this procedure when errors occur. You can send this message explicitly or by using the capSetCallbackOnError macro.

WM_CAP_SET_CALLBACK_ERROR 
wParam = (WPARAM) 0; 
lParam = (LPARAM) (LPVOID) (fpProc); 
 

Parameters

fpProc

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

Return Values

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

Remarks

Applications can optionally set an error callback function. If set, AVICap calls the error procedure in the following situations:

• The disk is full.
• A capture window cannot be connected with a capture driver.
• A waveform-audio device cannot be opened.
• The number of frames dropped during capture exceeds the specified percentage.
• The frames cannot be captured due to vertical synchronization interrupt problems.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in vfw.h.
  Unicode: Defined as Unicode and ANSI messages.

See Also

Video Capture Overview, Video Capture Messages, capSetCallbackOnError