PPT Slide

static RECT wndRect; // A rectangle object for the window's client area

static HWND hwndApp; // The handle of the application window

static LPDIRECTDRAW lpdd; // Pointer to DirectDraw object

static LPDIRECTDRAWSURFACE lpFrontBuffer; // Pointer to front buffer

static LPDIRECTDRAWSURFACE lpBackBuffer; // Pointer to back buffer

static LPGUID lpServiceProviderGuid; // Pointer to GUID of the service provider

static LPDIRECTPLAY lpDirectPlay1; // Pointer for the DirectPlay Object

static DPID playerID; // To store the player ID

static BOOL joinSession; // Join a session(TRUE) or create a new one(FALSE)

// Function declarations for forward references

static BOOL WinInit( HINSTANCE hInst, int nCmdShow ); //Initialize & set up Windows

static BOOL DXInit(void); //Initialize & set up DirectX components

static void UpdateFrame(char* direction);

static void CleanUp();

// Called by DirectX when enumerating service providers

static BOOL FAR PASCAL DirectPlayEnumerateCallback(

LPGUID lpSPGuid,

LPTSTR lpszSPName,

DWORD dwMajorVersion,

DWORD dwMinorVersion,

LPVOID lpContext

);

// Called by DirectPlay when enumerating sessions

static BOOL FAR PASCAL EnumSessionsCallback(

LPDPSESSIONDESC lpSessionDesc,

LPVOID lpContext,

LPDWORD lpdwTimeOut,

DWORD dwFlags

);

//Helper functions

static HRESULT CreateDirectPlayInterface();

static HRESULT FindSession();

static HRESULT OpenSession();

static HRESULT MakePlayer();

Function

Declarations