Help on an Undocumented call

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2 total messages Started by Colin B Maharaj Mon, 04 Jun 2007 17:42

#1912

Author: Colin B Maharaj
Date: Mon, 04 Jun 2007 17:42

62 lines
2445 bytes

Hi all,
I was trying to write an interface to change an IP Address on a PC
programatically. I used netsh and tested it in WinXP and it was OK
The person who I wrote it for said it was not working in his environment
which was 2000. I then did some serious digging and got the undocumented
ip helper function called

SetAdapterIpAddress



which function I prototyped as ...

#include "iphlpapi.h"


typedef DWORD (WINAPI *PSETADAPTERIPADDRESS)(
const char*,DWORD,DWORD,DWORD,DWORD
);

declared as...
PSETADAPTERIPADDRESS SetAdapterIpAddress;


and got a function address like......

hLib = LoadLibrary("Iphlpapi.dll");
SetAdapterIpAddress = 
(PSETADAPTERIPADDRESS)GetProcAddress(hLib,"SetAdapterIpAddress");


And use like this....

//-------------------------------------------------------------------------------------
#include "iphlpapi.h"


    bool ChangeAdaptorAddress(AnsiString A, AnsiString B, AnsiString C)
    {
      IPAddr A1, B1, C1;

      A1 = inet_addr(A.c_str());
      B1 = inet_addr(B.c_str());
      C1 = inet_addr(C.c_str());
      int retvalue  = SetAdapterIpAddress(card.c_str(), 0, A1, B1, C1);
//     ShowMessage(retvalue );
    }

In my environment, retvalue return 0
in the 2000 environment it returns 2

card is the uuid address taken from the registry.
0
mean no DHCP.

I know this is a toughy and no guarantees for help
but I need to set the address without restarting the PC

If anyone has an Idea how to get this working
let me know.

(2 - is like 'File Not found' or something)

Re: Help on an Undocumented call

#1913

Author: Ed Mulroy
Date: Mon, 04 Jun 2007 18:30

71 lines
2977 bytes

Maybe this will help.  It's written for VB but with a little work you should 
be able to translate it to something understandable

http://tinyurl.com/ytabvg
    AKA
http://www.msfn.org/board/lofiversion/index.php/t70524.html

.  Ed

> Colin B Maharaj wrote in message
> news:46644efb@newsgroups.borland.com...
> Hi all,
> I was trying to write an interface to change an IP Address on a PC
> programatically. I used netsh and tested it in WinXP and it was OK
> The person who I wrote it for said it was not working in his environment
> which was 2000. I then did some serious digging and got the undocumented
> ip helper function called
>
> SetAdapterIpAddress
>
> which function I prototyped as ...
>
> #include "iphlpapi.h"
>
>
> typedef DWORD (WINAPI *PSETADAPTERIPADDRESS)(
> const char*,DWORD,DWORD,DWORD,DWORD
> );
>
> declared as...
> PSETADAPTERIPADDRESS SetAdapterIpAddress;
>
>
> and got a function address like......
>
> hLib = LoadLibrary("Iphlpapi.dll");
> SetAdapterIpAddress = 
> (PSETADAPTERIPADDRESS)GetProcAddress(hLib,"SetAdapterIpAddress");
>
>
> And use like this....
>
> //-------------------------------------------------------------------------------------
> #include "iphlpapi.h"
>
>
>    bool ChangeAdaptorAddress(AnsiString A, AnsiString B, AnsiString C)
>    {
>      IPAddr A1, B1, C1;
>
>      A1 = inet_addr(A.c_str());
>      B1 = inet_addr(B.c_str());
>      C1 = inet_addr(C.c_str());
>      int retvalue  = SetAdapterIpAddress(card.c_str(), 0, A1, B1, C1);
> //     ShowMessage(retvalue );
>    }
>
> In my environment, retvalue return 0
> in the 2000 environment it returns 2
>
> card is the uuid address taken from the registry.
> 0
> mean no DHCP.
>
> I know this is a toughy and no guarantees for help
> but I need to set the address without restarting the PC
>
> If anyone has an Idea how to get this working
> let me know.
>
> (2 - is like 'File Not found' or something)

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