#pas
var
    hIP : THandle;
    BC : Integer;
    ...
begin
  BC := ReadInteger(_Data, _data_dtByteCount, _prop_ByteCount);
  hIP := IcmpCreateFile();
  ...
  // И ниже везде _prop_ByteCount замени на BC
end;

Add(MainForm,2953706,14,112)
{
 Width=250
 Height=180
 Color=15793151
 Font=[Tahoma,8,0,0,1]
 Caption="Пингомер"
 BorderStyle=4
 Position=1
}
Add(Edit,8392031,147,63)
{
 Left=60
 Top=40
 Color=15793151
 Font=[Tahoma,10,0,0,1]
 Text="32"
 Alignment=2
 DataType=1
 MaxLenField=6
 ClearAfterEnter=1
}
Add(Edit,4303247,196,63)
{
 Left=130
 Top=40
 Color=15793151
 Font=[Tahoma,10,0,0,1]
 Text="1000"
 Alignment=2
 DataType=1
 MaxLenField=10
 ClearAfterEnter=1
}
Add(Ping,12335572,98,168)
{
 Name=""
 ByteCount=0
 TimeOut=0
 Point(ByteCount)
 Point(Time)
 link(onFind,7637930:doString,[(220,174)(220,231)(79,231)(79,258)])
 link(onFailed,16515319:doMessage,[])
 link(Name,3199038:Text,[])
 link(ByteCountIn,8392031:Text,[(111,125)(153,125)])
 link(TimeOutIn,4303247:Text,[(118,141)(202,141)])
}
Add(Button,16051153,56,168)
{
 Left=95
 Top=65
 Height=25
 Font=[Tahoma,10,1,0,1]
 Caption="ПИНГ"
 link(onClick,12335572:doPing,[])
}
Add(Label,2644215,168,252)
{
 Left=3
 Top=95
 Width=240
 Height=60
 Color=15793151
 Font=[Tahoma,10,1,0,1]
 Caption="IP\r\nБайт\r\nЗадержка\r\n"
 AutoSize=1
 Alignment=2
}
Add(Edit,3199038,98,63)
{
 Width=244
 Height=25
 Align=2
 Color=0
 Font=[Tahoma,10,0,65535,1]
 Name="Адрес"
 Text="hiasm.net"
 Alignment=2
 MaxLenField=1000
 ClearAfterEnter=1
}
Add(Message,16515319,161,175)
{
 Caption="Ошибка"
 Icon=3
}
Add(Label,15041900,98,28)
{
 Left=60
 Top=25
 Width=43
 Height=12
 Color=15793151
 Font=[Tahoma,8,0,0,1]
 Caption="Размер:"
}
Add(Label,9752276,196,28)
{
 Left=130
 Top=25
 Height=12
 Color=15793151
 Font=[Tahoma,8,0,0,1]
 Caption="Таймаут:"
}
Add(FormatStr,7637930,91,252)
{
 DataCount=3
 Mask="IP: %1\r\nБайт: %2\r\nЗадержка: %3"
 link(onFString,2644215:doText,[])
 link(Str2,12335572:ByteCount,[])
 link(Str3,12335572:Time,[])
}

#pas
....
    (*pHostEn := gethostbyname(pchar(ReadString(_Data,_data_Name,_prop_Name)));
    if (GetLastError <> 0) then
     begin
        _hi_OnEvent(_event_onFailed,2);
        goto error;
     end;
    destAddress := PInAddr(pHostEn^.h_addr_list^)^;*)
    destAddress.S_addr := inet_addr(PChar(ReadString(_Data,_data_Name,_prop_Name)));
....