Thanks for your answer. I did it ,but I can't understand anything. My Dll file described like this: public interface TradeDll extends StdCallLibrary {

public static class Instrument extends Structure { public static class ByValue extends Instrument implements Structure.ByValue { } public long id; public byte[] marketName =new byte[15];; public byte[] sectorName=new byte[15]; public byte[] groupName=new byte[15]; public byte[] shortName=new byte[15]; public byte[] name=new byte[100]; public byte status; public byte sesNum; public double open; public double ask; public double bid; public double last; public long lastVolume; public double average; public double max; public double min; public long volume; public long volTotal; public long orderCnt; public long dealCnt; public long ustKurs; public double kaseKurs; public long curId; public byte[] nin=new byte[15]; public byte isCupon; public long nominal; public byte method; public byte[] base=new byte[250]; public double cuponTax; public long cuponCnt; public long pastPayDate; public long nextPayDate; public long xDate; public double accInt; public double startKurs; public double koeff; public long days; public long closeDate; public long openDate; public long lot; public double korrCnt; public double korrPrc; } long getInstrumentCount(); Instrument.ByValue getInstrumentByNum(long n);

In my programm I have written like this:

import com.sun.jna.*; import arm.Trade.TradeDll; import com.sun.jna.*; import com.sun.jna.ptr.*; import com.sun.jna.Pointer.*; import java.lang.reflect.Field;

public class LocalTime { public static void main (String [] args) {

TradeDll lib=(TradeDll)Native.loadLibrary("c:/trade", TradeDll.class);

try { long n=lib.getInstrumentCount(); System.out.println(n); for (long i=0;i<1; i++) {

TradeDll.Instrument result=lib.getInstrumentByNum(i); Structure s=result; Field f; System.out.println(s.toString()); String s1=new String(result.marketName); String s2=new String(result.sectorName); String s3=new String(result.groupName); String s4=new String(result.shortName); String s5=new String(result.name); String s6=new String(result.nin); System.out.println(result.id+" "+s1+" "+s2+" "+s3+" "+s4+" "+s5+" "+s6); } } catch(Exception e) { System.out.print("Exception: "+e.toString()); } } }

After running my program the result is: init: deps-jar: compile-single: run-single: 677 TradeDll$Instrument$ByValue(allocated@0x3f24e0 (632 bytes)) { byte id[4]@0=[B@758fc9 byte marketName[15]@4=[B@32fb4f byte sectorName[15]@13=[B@1113708 byte groupName[15]@22=[B@133f1d7 byte shortName[15]@31=[B@14a9972 byte name[100]@40=[B@a01335 byte status@a4=1 byte sesNum@a5=0 double open@a8=0.0 double ask@b0=0.0 double bid@b8=0.0 double last@c0=0.0 Pointer lastVolume@c8=null double average@d0=0.0 double max@d8=0.0 double min@e0=0.0 Pointer volume@e8=null Pointer volTotal@ec=null Pointer orderCnt@f0=null Pointer dealCnt@f4=null double ustKurs@f8=-558.65283203125 double kaseKurs@100=3.66088800274E-313 Pointer curId@108=native@0x43315a4b byte nin[15]@10c=[B@bf32c byte isCupon@11b=0 Pointer nominal@11c=null byte method@120=0 byte base[250]@121=[B@89fbe3 double cuponTax@220=4.9E-324 Pointer cuponCnt@228=null Pointer pastPayDate@22c=null Pointer nextPayDate@230=null Pointer xDate@234=null double accInt@238=0.0 double startKurs@240=0.0 double koeff@248=0.0 long days@250=6442454047 Pointer closeDate@258=null Pointer openDate@25c=native@0x3ff00000 Pointer lot@260=null double korrCnt@268=1.0E-323 double korrPrc@270=0.0 } memory dump [20ab0000] [45717569] [74696573] [00000000] [0000004c] [69737469] [6e670000] [00000000] [00004c69] [7374696e] [67204100] [00000000] [004b4b47] [42200000] [00000000] [00000000] [cff0eef1] [f2fbe520] [e0eaf6e8] [e820c0ce] [2022cae0] [e7eaeeec] [ece5f0f6] [e1e0edea] [22000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [0100f477] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [397581c0] [06848940] [11000000] [4b5a3143] [30303430] [30303136] [00000000] [01000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [01000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [00000000] [1f0c0080] [01000000] [00000000] [0000f03f] [00000000] [0000f03f] [02000000] [00000000] [00000000] [00000000] [B@758fc9 Equities

as I said I can't get values from Long and double type variable . I think you can help me to solve this problem :-); Thank