The MCIWndGetActiveTimer macro retrieves the update period used when the MCIWnd window is the active window. You can use this macro or explicitly send the MCIWNDM_GETACTIVETIMER message.
UINT MCIWndGetActiveTimer(
hwnd
);
Returns the update period in milliseconds. The default is 500 milliseconds..
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in vfw.h.
MCIWnd Window Class Overview, MCIWnd Macros, MCIWNDM_GETACTIVETIMER