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// ScreenSaverWnd.h : header file 
// 
 
#ifndef __SCREENSAVERWND_H__ 
#define __SCREENSAVERWND_H__ 
 
///////////////////////////////////////////////////////////////////////////// 
 
// CScreenSaverWnd: 
// A Win95, Win98, WinNT3, WinNT4, WinNT5 compliant screen saver. 
// 
// There are several requirements to be a compliant screen saver. 
// These are very arbitrary, but have their historical roots to Windows 3.0 
// and the Microsoft Entertainment Pack 1.0 (IdleWild), as well as the 
// competing products also vying for a standard. 
// 
// For all screen savers, 
// * The name or description of the screen saver is in string 1. 
// * The icon for the screen saver is ID_APP, defined in  to 100. 
// * The WINAPI ScreenSaverProc() must be defined and exported. 
//   (The CScreenSaverWnd module implements this API for you.) 
// * The executable should be named with a .SCR file extension. 
// 
// For configurable screen savers, 
// * The dialog for configuring the screen saver is DLG_SCRNSAVECONFIGURE, 
//   defined in  to 2003. 
// * The WINAPI ScreenSaverConfigureDialog() must be defined and exported. 
// * The WINAPI RegisterDialogClasses() must be defined and exported. 
//   (The CScreenSaverDlg module implements these APIs for you.) 
// 
// Supporting configuration, by using CScreenSaverDlg or other methods, 
// is optional for compliant screen savers.  The RestoreOptions() member 
// function is called upon startup, but calling SaveOptions() is up to 
// the derived class; neither function does anything in the base definition. 
// 
// There should be no CWinApp object instantiated.  Instead, instantiate one 
// CScreenSaverWnd-derived object.  For configurable savers, instantiate one 
// CScreenSaverDlg-derived object also.  These can be done as globals. 
// 
// Win32 screen savers support password protection without supplying their 
// own dialogs, through a built-in feature of the operating system.  This 
// makes the password more secure than having each screen saver solve the 
// same problems in different ways. 
 
///////////////////////////////////////////////////////////////////////////// 
 
#include  
 
class CScreenSaverWnd : public CWnd 
{ 
	DECLARE_DYNAMIC(CScreenSaverWnd) 
public: 
	CScreenSaverWnd(); 
 
// Attributes 
protected: 
	BOOL m_bAutoBlack; 
	CPalette* m_pPalette; 
public: 
	BOOL IsAutoBlack() const; 
	void SetAutoBlack(BOOL bAutoBlack = TRUE); 
	// 
	CPalette* GetPalette() const; 
	CPalette* SetPalette(CPalette* pPalette); 
 
// Operations 
public: 
 
// Overridables 
public: 
	virtual void OnDraw(CDC* pDC); 
	virtual void OnInitialUpdate(); 
	virtual void SaveOptions(); 
	virtual void RestoreOptions(); 
 
// Overrides 
public: 
	//{{AFX_VIRTUAL(CScreenSaverWnd) 
	//}}AFX_VIRTUAL 
 
// Implementation 
public: 
	virtual ~CScreenSaverWnd(); 
	static CScreenSaverWnd* sm_pTheScreenSaver; 
 
protected: 
	virtual LRESULT WindowProc(UINT uMsg, WPARAM wParam, LPARAM lParam); 
	virtual LRESULT DefWindowProc(UINT uMsg, WPARAM wParam, LPARAM lParam); 
	//{{AFX_MSG(CScreenSaverWnd) 
	afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct); 
	afx_msg BOOL OnEraseBkgnd(CDC* pDC); 
	afx_msg void OnPaint(); 
	afx_msg BOOL OnQueryNewPalette(); 
	afx_msg void OnPaletteChanged(CWnd* pFocusWnd); 
	//}}AFX_MSG 
	DECLARE_MESSAGE_MAP() 
 
//friend LRESULT WINAPI ScreenSaverProc(HWND hWnd, UINT uMsg, 
//                                      WPARAM wParam, LPARAM lParam); 
}; 
 
///////////////////////////////////////////////////////////////////////////// 
 
inline CScreenSaverWnd* AfxGetScreenSaverWnd() 
	{ 
		return CScreenSaverWnd::sm_pTheScreenSaver; 
	} 
 
///////////////////////////////////////////////////////////////////////////// 
 
LRESULT WINAPI ScreenSaverProc(HWND hWnd, UINT uMsg, 
                               WPARAM wParam, LPARAM lParam); 
 
///////////////////////////////////////////////////////////////////////////// 
 
#endif // __SCREENSAVERWND_H__