C # method for sending faxes

/**////<summary>
Method of sending a fax, passing three parameters
</summary>
<param name= "Faxfile" ></param>
<param name= "Faxnumber" ></param>
<param name= "HostName" ></param>
public void SendFax (string faxfile, String faxnumber,string hostName)
{

WriteFile ("SendFax faxfile=" +faxfile);
String sql = "";
String faxid = "";
FileInfo f = new FileInfo (faxfile);
if (f.exists)
{
Faxcomlib.faxserver faxsvr = null;
Faxcomlib.faxdoc faxdoc = null;
Try
{
Faxsvr = new Faxcomlib.faxserver ();
Faxdoc = (faxcomlib.faxdoc) faxsvr. CreateDocument (F.fullname);
}
catch (Exception ex)
{
ErrorMessage = ex. message;
WriteFile ("Create Fax Server error!" + errormessage);//environment.machinename
}
Try
{
Faxsvr. Connect (HostName); or specify the computer name Environment.MachineName
}
catch (Exception ex)
{
ErrorMessage = ex. message;
WriteFile ("link Host" +hostname+ "error!" + errormessage);
}

Try
{
Faxdoc. FileName =f.fullname;
Faxdoc. Recipienttitle = "Recipienttitle";
Faxid = F.name;//system.datetime.now.tostring ();
Faxdoc. Recipientzip = Faxid;
WriteFile ("SendFax faxfile=" +faxfile +); F.fullname= "+ Faxdoc. FileName);
//     //-----------------------------------------------------////////
Faxdoc. RecipientAddress = "RecipientAddress";
Faxdoc. Recipientcompany = "Recipientcompany";
Faxdoc. Recipientcountry = "Recipientcountry";
Faxdoc. Recipientdepartment = "Recipientdepartment";
Faxdoc. Recipienthomephone = "Recipienthomephone";
Faxdoc. RecipientName = faxid;/**/////////////Fax ID number
Faxdoc. Recipientoffice = "Recipientoffice";
Faxdoc. Recipientofficephone = "Recipientofficephone";
Faxdoc. sendcoverpage = 0;
Faxdoc. senderaddress = "Senderaddress";
Faxdoc. SenderCompany = "SenderCompany";
Faxdoc. Senderdepartment = "Senderdepartment";
Faxdoc. Senderfax = "Senderfax";
Faxdoc. Senderhomephone = "Senderhomephone";
Faxdoc. Senderofficephone = "Senderofficephone";
Faxdoc. Sendertitle = "Sendertitle";
Faxdoc. Servercoverpage = 1;
Faxdoc. Coverpagename = "Coverpagename";
Faxdoc. Coverpagenote = "Coverpagenote";
Faxdoc. Coverpagesubject = "Coverpagesubject";
//     //------------------------------------------------------//////////
Faxdoc. Faxnumber =faxnumber;//Specify the Fax number;
WriteFile ("f.fullname=" +f.fullname +); Faxdoc. Filename= "+ Faxdoc. FileName);
Intsend = Faxdoc. Send ();
WriteFile ("faxdoc.tsid=" + faxdoc). Sendcoverpage + "; GetHashCode "+ Faxdoc. GetHashCode () + "; FileName: "+ Faxdoc." FileName);
System.Threading.Thread.Sleep (2000);
Faxsvr. Disconnect ();
WriteFile ("Send successfully[" +intsend+ "]" + F.fullname + "" + "(faxnumber:" +faxnumber + "; HostName:" +hostname+ ")" );
sign = 1;
}
catch (Exception ex)
{
ErrorMessage = ex. message;
WriteFile ("Send error[" +intsend+ "]" +f.fullname+ "+errormessage +" (faxnumber: "+faxnumber +"; HostName: " +hostname+ ")");
sign = 0;
System.Threading.Thread.Sleep (5000);
}

}
Else
{
sign = 0;
ErrorMessage = "Error:" +faxfile + "not exist!";
WriteFile (errormessage);
}
if (sign ==0)
{
sql = "UPDATE job_log SET result_message = ' ERROR:" +errormessage.replace ("'", "" ") +" ', log_title= ' "+faxid+" ";
sql = "Where sql like '%" +f.name + "' and event_type = ' FAX '";
Sqlupdate (SQL);

}
else if (sign ==1)
{
sql = "UPDATE job_log SET result_message = ' successfully ', Log_title = '" +faxid+ "";
sql = "Where sql like '%" +f.name + "' and event_type = ' FAX '";
Sqlupdate (SQL);

}

}