WM_CAP_SET_CALLBACK_STATUS message
The WM_CAP_SET_CALLBACK_STATUS message sets a status callback function in the application. AVICap calls this procedure whenever the capture window status changes. You can send this message explicitly or by using the capSetCallbackOnStatus macro.
WM_CAP_SET_CALLBACK_STATUS
wParam = (WPARAM) 0;
lParam = (LPARAM) (LPVOID) (fpProc);
Parameters
-
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
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] |
| Header |
|