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RAS
By Terence
"Dr. CE" Goggin
Copyright 2000, 2001 Terence Goggin
Version 1.00 Revised 4/20/01
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Topics
1. How do I establish a RAS Dial-up connection?
2. How do I hang up a RAS connection?
3. How do I handle RAS notifications?
1. How do I establish a RAS Dial-up connection?
The code below shows how to use RasDial() to establish
a RAS connection; however, it's worth noting that it uses
a pre-existing RAS entry to do so.
While it's possible to enter the various parameters via
code, using an existing dial up entry is considerably easier.
#define ENTRY TEXT("testconn") /* name of dial up conn entry */
#define USERNAME TEXT("testpda") /* User id */
#define PASSWORD TEXT("testpda1") /* pass */
//hNotify is the window to receive RAS status notification msgs
BOOL DialUp(HWND hNotify)
{
/* Initialize */
// Fill out rasDialParams from phone book entry
BOOL fPassword = FALSE; //TRUE if password has been retrived from phone book entry
BOOL fHavePhoneNumber = TRUE; // phone book entry has a phone number
lstrcpy(g_DialInfo.rasDialParams.szEntryName, ENTRY);
g_DialInfo.rasDialParams.dwSize = sizeof(RASDIALPARAMS);
RasGetEntryDialParams(NULL, &(g_DialInfo.rasDialParams), &fPassword);
/* call API */
DWORD dwRet = RasDial(NULL, NULL, &(g_DialInfo.rasDialParams), 0xFFFFFFFF, hNotify, & (g_DialInfo.hRasConn));
/* check the result */
if (dwRet == 0)
{
return TRUE;
}
else
{
return FALSE;
}
}
2. How do I hang up a RAS connection?
I think this code speaks for itself... can be used in
conjunction with the code from the previous question....
BOOL HangUp()
{
if(g_DialInfo.hRasConn!=NULL)
{
return RasHangUp(g_DialInfo.hRasConn);
}
return TRUE; //already hung up
}
3. How do I handle RAS notifications?
Somewhere inside your WndProc(), add a message handler
similar to the one shown here...
case WM_RASDIALEVENT:
WCHAR szMessage[256];
LoadString(hInst, GetRasConnState( (RASCONNSTATE) wParam ), szMessage, 64 );
if ((DWORD)lParam)
{
wsprintf(szMessage, L"Unable to complete connection. Error %d", GetLastError());
MessageBox((HWND)hDlg, szMessage, L"Error", MB_ICONSTOP | MB_OK);
//ExitThread(0);
return 0;
}
switch( (RASCONNSTATE) wParam )
{
case RASCS_OpenPort:
break;
case RASCS_PortOpened:
break;
case RASCS_ConnectDevice:
break;
case RASCS_DeviceConnected:
break;
case RASCS_AllDevicesConnected:
break;
case RASCS_Authenticate:
break;
case RASCS_AuthNotify:
break;
case RASCS_AuthRetry:
break;
case RASCS_AuthCallback:
break;
case RASCS_AuthChangePassword:
break;
case RASCS_AuthProject:
break;
case RASCS_AuthLinkSpeed:
break;
case RASCS_AuthAck:
break;
case RASCS_ReAuthenticate:
break;
case RASCS_Authenticated:
break;
case RASCS_PrepareForCallback:
break;
case RASCS_WaitForModemReset:
break;
case RASCS_WaitForCallback:
break;
case RASCS_Interactive:
break;
case RASCS_RetryAuthentication:
break;
case RASCS_CallbackSetByCaller:
break;
case RASCS_PasswordExpired:
break;
case RASCS_Disconnected:
//hang up
break;
case RASCS_Connected:
//you're in!
break;
default:
break;
}
break;
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