// Panel.h#ifndef PANEL_H#define PANEL_H#include <Window.h>class Panel : public BWindow {public:Panel(BRect frame,const char* title,window_type type,uint32 flags,uint32 workspace = B_CURRENT_WORKSPACE);Panel(BRect frame,const char* title,window_look look,window_feel feel,uint32 flags,uint32 workspace = B_CURRENT_WORKSPACE);virtual ~Panel();// Panelvirtual void Cancel();private:void _InstallFilter();};#endif // PANEL_H