WM_CAP_FILE_ALLOCATE  I7UPSY 

The WM_CAP_FILE_ALLOCATE message creates (preallocates) a capture file of a specified size. You can send this message explicitly or by using the capFileAlloc12LYBSY macro.

WM_CAP_FILE_ALLOCATE

wParam = (WPARAM) 0;

lParam = (LPARAM) (DWORD) (dwSize);

Parameters

dwSize

Size, in bytes, to create the capture file.

Return Values

Returns TRUE if successful or FALSE otherwise.

If an error occurs and an error callback function is set using the WM_CAP_SET_CALLBACK_ERROR1EFK0BS message, the error callback function is called.

Remarks

You can improve streaming capture performance significantly by preallocating a capture file large enough to store an entire video clip and by defragmenting the capture file before capturing the clip.

See Also