The following code illustrates removing five seconds of a file.
USHORT usDeviceID;
MCI_EDIT_PARMS mep;
mep.hwndCallback = hwndMyWindow;
mep.ulFrom = 0;
mep.ulTo = 5000;
mciSendCommand( usDeviceID,
MCI_CUT,
MCI_NOTIFY | MCI_FROM | MCI_TO,
&mep,
0 );