How to call onChange event using FindComponent?
The Change() method is protected, so to call it directly like you are trying to, you would need to use an accessor class to grant access to the calling scope, eg:
type
TMemoAccess = class(TMemo)
end;
TMemoAccess(TMemo(FindComponent('mymemoname'))).Change();
Otherwise, you can just call the OnChange handler directly instead:
var TheMemo := TMemo(FindComponent('mymemoname'));
TheMemo.OnChange(TheMemo);