All constants that begin by the FME_ prefix, are used to identify events, i.e actions done by the user. They must be used inside the OnCtl handler.
(FME_CHANGED)?
(FME_CLICKED)?
(FME_COMBO_CLOSEUP)?
(FME_COMBO_DROPDOWN)?
(FME_CONTEXTMENU)?
(FME_CUSTOMEVENT)?
(FME_EXITSIZE)?
(FME_KILLEDITFOCUS)? (deprecated)
(FME_KILLFOCUS)?
(FME_LEFTCLICKED_DOWN)?
(FME_LEFTCLICKED_UP)?
(FME_PREVIEWDRAG)?
(FME_RIGHTCLICKED_DOWN)?
(FME_RIGHTCLICKED_UP)?
(FME_SETEDITFOCUS)?
(FME_SETFOCUS)? (deprecated)
(FME_SIZE)?
(FME_TIMER)?
(FME_VALUECHANGED)? (deprecated)