Is there anyone who can help me?I post it before.

[viorel]

Greeting All!

Is some one who can help me?

The problem is when I use a func(_GetDNSSer vers) from a native dll which is
responsible in returning DNS servers address.

public class DNSQuery
{
[DllImport("GetD NSDLL.dll")]
public static extern IntPtr _GetDNSServers( );
public void PerformSomeActi ons()
{
. . .
byte[]buffer=new byte[1000];
System.Runtime. InteropServices .Marshal.Copy(_ GetDNSServers() , buffer,0,
1000);
. . .
string strt=System.Tex t.Encoding.ASCI I.GetString(buf fer,0,1000);
strt= strt.Split(';')[0];
this.DNSHost=Sy stem.Net.Dns.Ge tHostByAddress( strt).AddressLi st[0];
IPEndPoint ipendp=new IPEndPoint(DNSH ost, 53);
sock.Connect(ip endp);
// ??????????????? ?An Error will happened!!!
sock = new
Socket(AddressF amily.InterNetw ork,socketType. Stream,Protocol Type.Tcp);
//??????????????? ??An Error has been!!!
. . .
}
}
Message of exception is
An unhandled exception of type 'System.Executi onEngineExcepti on' occurred in
system.dll

When I do not use _GetDNSServers( ),I use a known server address, connection
is done.

_GetDNSServers( ) returns char * (a pointer to an array of chars(1 byte
perchar)) which contains all DNS servers address from that domain

How to avoid the problem?

Thks!

[Eric Gunnerson [MS]]

dotnet.framewor k.interop is probably a better place to ask this. You'll want
to add in the C prototype of the function you're trying to call.

--
Eric Gunnerson

Visit the C# product team at http://www.csharp.net
Eric's blog is at http://blogs.gotdotnet.com/ericgu/

This posting is provided "AS IS" with no warranties, and confers no rights.
"viorel" <vm*********@ho tmail.com> wrote in message
news:Og******** ******@TK2MSFTN GP10.phx.gbl...

Greeting All!

Is some one who can help me?

The problem is when I use a func(_GetDNSSer vers) from a native dll which is responsible in returning DNS servers address.

public class DNSQuery
{
[DllImport("GetD NSDLL.dll")]
public static extern IntPtr _GetDNSServers( );
public void PerformSomeActi ons()
{
. . .
byte[]buffer=new byte[1000];
System.Runtime. InteropServices .Marshal.Copy(_ GetDNSServers() , buffer,0, 1000);
. . .
string strt=System.Tex t.Encoding.ASCI I.GetString(buf fer,0,1000);
strt= strt.Split(';')[0];
this.DNSHost=Sy stem.Net.Dns.Ge tHostByAddress( strt).AddressLi st[0];
IPEndPoint ipendp=new IPEndPoint(DNSH ost, 53);
sock.Connect(ip endp);
// ??????????????? ?An Error will happened!!!
sock = new
Socket(AddressF amily.InterNetw ork,socketType. Stream,Protocol Type.Tcp);
//??????????????? ??An Error has been!!!
. . .
}
}
Message of exception is
An unhandled exception of type 'System.Executi onEngineExcepti on' occurred in system.dll

When I do not use _GetDNSServers( ),I use a known server address, connection is done.

_GetDNSServers( ) returns char * (a pointer to an array of chars(1 byte
perchar)) which contains all DNS servers address from that domain

How to avoid the problem?

Thks!

[Eric Gunnerson [MS]]

dotnet.framewor k.interop is probably a better place to ask this. You'll want
to add in the C prototype of the function you're trying to call.

--
Eric Gunnerson

Visit the C# product team at http://www.csharp.net
Eric's blog is at http://blogs.gotdotnet.com/ericgu/

This posting is provided "AS IS" with no warranties, and confers no rights.
"viorel" <vm*********@ho tmail.com> wrote in message
news:Og******** ******@TK2MSFTN GP10.phx.gbl...

Greeting All!

Is some one who can help me?

The problem is when I use a func(_GetDNSSer vers) from a native dll which is responsible in returning DNS servers address.

public class DNSQuery
{
[DllImport("GetD NSDLL.dll")]
public static extern IntPtr _GetDNSServers( );
public void PerformSomeActi ons()
{
. . .
byte[]buffer=new byte[1000];
System.Runtime. InteropServices .Marshal.Copy(_ GetDNSServers() , buffer,0, 1000);
. . .
string strt=System.Tex t.Encoding.ASCI I.GetString(buf fer,0,1000);
strt= strt.Split(';')[0];
this.DNSHost=Sy stem.Net.Dns.Ge tHostByAddress( strt).AddressLi st[0];
IPEndPoint ipendp=new IPEndPoint(DNSH ost, 53);
sock.Connect(ip endp);
// ??????????????? ?An Error will happened!!!
sock = new
Socket(AddressF amily.InterNetw ork,socketType. Stream,Protocol Type.Tcp);
//??????????????? ??An Error has been!!!
. . .
}
}
Message of exception is
An unhandled exception of type 'System.Executi onEngineExcepti on' occurred in system.dll

When I do not use _GetDNSServers( ),I use a known server address, connection is done.

_GetDNSServers( ) returns char * (a pointer to an array of chars(1 byte
perchar)) which contains all DNS servers address from that domain

How to avoid the problem?

Thks!