TOperation = (opInsert, opRemove);
TComponentState = set of (csLoading, csReading, csWriting, csDestroying,
csDesigning, csAncestor, csUpdating, csFixups, csFreeNotification,
csInline, csDesignInstance);
TComponentStyle = set of (csInheritable, csCheckPropAvail, csSubComponent,
csTransient);
TComponentState和TComponentStyle
原文：http://www.cnblogs.com/findumars/p/5188210.html