EscapeMessageFilter
class EscapeMessageFilter : public BMessageFilter
EscapeMessageFilter(BWindow *window, int32 what);
EscapeMessageFilter(uint32 command)
AddCommonFilter(new EscapeMessageFilter(kMsgClearFilter));
EscapeMessageFilter::EscapeMessageFilter(BWindow *window, int32 what)
EscapeMessageFilter::Filter(BMessage *msg, BHandler **target)
AddCommonFilter(new EscapeMessageFilter(this, escape_msg));