private extern static uint RasGetProjectionInfo(
int hrasconn, // handle to a RAS connection
RASPROJECTION rasprojection, // type of control protocol
[In, Out] RASPPPIP lpprojection, // pointer to a structure that
ref uint lpcb // size of projection structure
);
public string GetIP(int lphrsaConn)
{
RASPPPIP structProjection = new RASPPPIP();
uint uiProjSize = (uint)structProjection.dwSize;
try {
uint errorCode = RasGetProjectionInfo(lphrsaConn, RASPROJECTION.RASP_PppIp, structProjection, ref uiProjSize);
return(structProjection.szIpAddress);
} catch {
return("");
}
}
public static string GetIP(string strEntryName)
{
RASCONN[] Rasconn = new RASCONN[1];
Rasconn[0].dwSize = Marshal.SizeOf(Rasconn[0]);
RASCONNSTATUS structure = new RASCONNSTATUS();
int lpcb = 0;
int lpcConnections = 0;
structure.dwSize = Marshal.SizeOf(structure);
int nErrorValue = RasEnumConnections(Rasconn, ref lpcb, ref lpcConnections);
switch (nErrorValue)
{
case 0:
break;
case 0x25b:
Rasconn = new RASCONN[lpcConnections];
lpcb = Rasconn[0].dwSize = Marshal.SizeOf(Rasconn[0]);
nErrorValue = RasEnumConnections(Rasconn, ref lpcb, ref lpcConnections);
break;
//default:
//ConnectNotify(this.GetErrorString(nErrorValue), 3);
//return;
}
int lphrsaConn = 0;
foreach (RASCONN rasconn in Rasconn.Where(rasconn => rasconn.szEntryName == strEntryName))
{
if (rasconn.hrasconn != 0)
{
lphrsaConn = rasconn.hrasconn;
}
}
if (lphrsaConn == 0)
{
return("");
}
RASPPPIP structProjection = new RASPPPIP();
uint uiProjSize = (uint)structProjection.dwSize;
try {
uint errorCode = RasGetProjectionInfo(lphrsaConn, RASPROJECTION.RASP_PppIp, structProjection, ref uiProjSize);
return(structProjection.szIpAddress);
} catch {
return("");
}
}
