|
//Look for a Hello World Session which might be already running
|
|
static HRESULT FindSession()
|
|
{
|
|
HRESULT hr;
|
|
DPSESSIONDESC sessionDesc;
|
|
ZeroMemory(&sessionDesc, sizeof(DPSESSIONDESC));
|
|
sessionDesc.dwSize = sizeof(DPSESSIONDESC);
|
|
sessionDesc.guidSession = sessionGUID;
|
|
hr = lpDirectPlay1->EnumSessions(&sessionDesc, 1000, EnumSessionsCallback,
|
|
hwndApp, DPENUMSESSIONS_AVAILABLE);
|
|
if FAILED(hr)
|
|
::MessageBox(NULL,"Could not find any HelloWorld sessions", "HelloWorld", MB_OK);
|
|
return(hr);
|
|
}
|
|
// Callback function for enumerating sessions
|
|
static BOOL FAR PASCAL EnumSessionsCallback(
|
|
LPDPSESSIONDESC lpSessionDesc,
|
|
LPVOID lpContext,
|
|
LPDWORD lpdwTimeOut,
|
|
DWORD dwFlags
|
|
)
|
|
{
|
|
if (dwFlags & DPESC_TIMEDOUT)
|
|
::MessageBox(NULL,"Could not find a HelloWorld session!....Timed Out", "HelloWorld", MB_OK);
|
|
else
|
|
::MessageBox(NULL,"Found a HelloWorld session!", "HelloWorld", MB_OK);
|
|
return(FALSE);
|
|
}
|
|
FindSession():
|
|
Enumerates other DirectPlay
|
|
sessions with same GUID
|
|
EnumSessionsCallback()
|
|
is called by DirectPlay for each session it finds.
|
