用Ｃ＋＋Ｂuilder写个程序,内容是获取本地计算机的IP地址,要怎么写?

                                                                                                             我是初学者![em45]

void __fastcall TForm1::Button1Click(TObject *Sender) { char buff[60]; unsigned long nn; nn=60; GetComputerName(buff,&nn); Edit1->Text=buff; } //---------------------------------------------------------------------------

void __fastcall TForm1::Button2Click(TObject *Sender) { if(SetComputerName(Edit1->Text.c_str())) { ShowMessage("需重启计算机设置才生效!"); } } //---------------------------------------------------------------------------

void __fastcall TForm1::Button3Click(TObject *Sender) { TRegistry *rg; // rg=new TRegistry(); rg->RootKey=HKEY_LOCAL_MACHINE;

rg->OpenKey("\\SYSTEM\\ControlSet001\\Services\\Tcpip\\Parameters\\Interfaces\\{94BC1360-7F56-4E1E-9FC1-BCF37AF51252}",False); Edit2->Text=rg->ReadString("DhcpDomain");

// rg->CloseKey(); rg->Free(); } //--------------------------------------------------------------------------- void __fastcall TForm1::Button4Click(TObject *Sender) { TRegistry *rg; // rg=new TRegistry(); rg->RootKey=HKEY_LOCAL_MACHINE;

rg->OpenKey("\\SYSTEM\\ControlSet001\\Services\\{94BC1360-7F56-4E1E-9FC1-BCF37AF51252}\\Parameters\\Tcpip",False); Edit3->Text=rg->ReadString("DhcpIPAddress"); // rg->CloseKey(); rg->Free(); } 程序是这样，但是为什么在我的机子还是就可以，在别人的机上就不得呢？

这程序的查计算机名，该计算机名，查工作组名和查IP的