请问：如何写拨号代码？

Question

我的机器是通过ADSL上网的，我想了解怎样
写拨号上网代码？有资料吗?

Answer 1

RAS函数
http://www.pudn.com/downloads148/sourcecode/multimedia/ip_phone/detail641221.html

Answer 2

我不能下载，有没有发给我一份？（网络上都是Delphi，我要的是C），我的地址：
[email protected]

Answer 3

void CDialerDlg::OnOK() 
{
// TODO: Add extra validation here
UpdateData(); GetDlgItem(IDOK)->EnableWindow(FALSE);
GetDlgItem(IDC_COMBO_CONNECT_ENTRIES)->EnableWindow(FALSE);
GetDlgItem(IDC_EDIT_USERNAME)->EnableWindow(FALSE);
GetDlgItem(IDC_EDIT_PASSWORD)->EnableWindow(FALSE);

TCHAR lpszEntry[256];
GetDlgItemText(IDC_COMBO_CONNECT_ENTRIES, lpszEntry, 255); RASDIALPARAMS RasDialParams;
RasDialParams.dwSize = sizeof(RASDIALPARAMS); lstrcpy(RasDialParams.szEntryName, lpszEntry);
lstrcpy(RasDialParams.szPhoneNumber, _T(""));
lstrcpy(RasDialParams.szCallbackNumber, _T(""));
GetDlgItemText(IDC_EDIT_USERNAME,RasDialParams.szUserName,UNLEN);
GetDlgItemText(IDC_EDIT_PASSWORD,RasDialParams.szPassword, PWLEN); hRasConn = NULL;
DWORD dwRet = RasDial(NULL, NULL, &RasDialParams, 0L, (RASDIALFUNC)RasDialFunc, &hRasConn);
if(dwRet)
{
CString szMsg;
if(RasGetErrorString((UINT)dwRet, szMsg.GetBuffer(256),256)!=0)
{
szMsg.ReleaseBuffer();
szMsg.Format("未知的远程访问错误,错误代码为：%ld.",dwRet);
}
else
szMsg.ReleaseBuffer(); CString buf;
buf.Format("错误代码为：%ld.",dwRet); szMsg += buf;        MessageBox(szMsg,"拨号失败",MB_OK|MB_ICONSTOP);
hRasConn = NULL;
//CDialog::OnCancel();
GetDlgItem(IDOK)->EnableWindow();
GetDlgItem(IDC_COMBO_CONNECT_ENTRIES)->EnableWindow();
GetDlgItem(IDC_EDIT_USERNAME)->EnableWindow();
GetDlgItem(IDC_EDIT_PASSWORD)->EnableWindow();
SetDlgItemText(IDC_STATIC_STATUS,"未连接，空闲");
}
}LRESULT CDialerDlg::OnRasDialEvent(WPARAM wparam, LPARAM lparam)
{
CString szMsg;
CString buf; LoadString(AfxGetInstanceHandle(),GetRasConnState((RASCONNSTATE)wparam),buf.GetBuffer(256),256);
szMsg.ReleaseBuffer(); SetDlgItemText(IDC_STATIC_STATUS,"");
SetDlgItemText(IDC_STATIC_STATUS,buf); if(lparam) //错现错误
    {
if(RasGetErrorString((UINT)lparam, szMsg.GetBuffer(256),256)!=0)
{
szMsg.ReleaseBuffer();
szMsg.Format("未知的远程访问错误,");
}
else
szMsg.ReleaseBuffer(); //szMsg = buf + "\n" + szMsg;
buf.Format("错误代码为：%ld.",lparam); szMsg += buf;        MessageBox(szMsg,"拨号失败",MB_OK|MB_ICONSTOP);
RasHangUp( hRasConn );
hRasConn = NULL;
//CDialog::OnCancel();
GetDlgItem(IDOK)->EnableWindow();
GetDlgItem(IDC_COMBO_CONNECT_ENTRIES)->EnableWindow();
GetDlgItem(IDC_EDIT_USERNAME)->EnableWindow();
GetDlgItem(IDC_EDIT_PASSWORD)->EnableWindow();
SetDlgItemText(IDC_STATIC_STATUS,"未连接，空闲");
    }                                                                                                               
    else 
if(RASCS_DONE&wparam) //拨号连接成功
{
//AfxMessageBox("拨号连接成功",MB_OK|MB_ICONINFORMATION);
CDialog::OnOK();          // 关闭对话框
} return (LRESULT)0;
}