Argument string structure size mismatch

I am trying to go over some basic win32 functions to get a better handle
on working with Jawin. Below is the code, it mostly speaks for itself.
Basically, the problem is that when I invoke the function with the
"P66:B1:n66" instruction string as I would expect it to be, it doesn't
work and the error is " passed end of stream in the marshalling layer". I
figured that something was not right with the P66 part of the instruction
string, and I started lowering it. Finally, the function works at
"P60:B1:n60".  I must be wrong somewhere, probably when calculating the
size of the struct. However, I even compared the sizes of the Java members
by looking at the Visual J++ class corresponding to the PRINTDLG structure
(and they are all the same as in my class). What am I calculating wrong ?

Thanks in advance for the help.

This is my test code in Jython, but it is pretty readable, so I wouldn't
convert it to Java:

>>> from org.jawin import *
>>> from org.jawin.io import *
>>> from org.jawin.marshal import *
>>> from com.divintech.testing import *
>>> import java

>>> printDlg = FuncPtr("comdlg32.dll","PrintDlgW")
>>> nbs = NakedByteStream()
>>> leos = LittleEndianOutputStream(nbs)
>>> pd = PRINTDLG()
>>> pd.lStructSize = pd.size
>>> pd.size
66
>>> instructions = "P66:B1:n66"
>>> pd.marshal(leos)

Now, the error, when I run when I run it:
>>> printDlg.invoke(instructions,4,nbs,None,ReturnFlags.CHECK_FALSE)
Traceback (innermost last):
  File "<console>", line 1, in ?
org.jawin.COMException: 8000ffff: passed end of stream in the marshalling
layer
        at org.jawin.marshal.GenericStub.win32Invoke0(Native Method)
        at org.jawin.marshal.GenericStub.win32Invoke(GenericStub.java:152)
        at org.jawin.FuncPtr.invoke(FuncPtr.java:186)
        at org.jawin.FuncPtr.invoke(FuncPtr.java:205)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)....
------------ jython errors snipped -------------------
org.jawin.COMException: org.jawin.COMException: 8000ffff: passed end of
stream in the marshalling layer


And now the good news, when I run : I get the Print dialog and when it
retuns I get a byte array.

>>> printDlg.invoke("P60:B1:n60",4,nbs,None,ReturnFlags.CHECK_FALSE)
array([1, 66, 0, 0, 0, 0, 0, 0, 0, 100, 0, 115, 0, 108, 0, 115, 0, 0, 0,
0, 0, 0, 0, 0, 0, -1, -1, -1, -1, 1, 0, -1, -1
 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0], byte)


The equivalent of the PRINTDLG struct is:
/*
 * PRINTDLG.java
 *
 * Created on August 13, 2004, 7:47 PM
 *
 *
 *
 *
 *
 *
 *
typedef struct tagPD {
    DWORD lStructSize;
    HWND hwndOwner;
    HGLOBAL hDevMode;
    HGLOBAL hDevNames;
    HDC hDC;
    DWORD Flags;
    WORD nFromPage;
    WORD nToPage;
    WORD nMinPage;
    WORD nMaxPage;
    WORD nCopies;
    HINSTANCE hInstance;
    LPARAM lCustData;
    LPPRINTHOOKPROC lpfnPrintHook;
    LPSETUPHOOKPROC lpfnSetupHook;
    LPCTSTR lpPrintTemplateName;
    LPCTSTR lpSetupTemplateName;
    HGLOBAL hPrintTemplate;
    HGLOBAL hSetupTemplate;
} PRINTDLG, *LPPRINTDLG;
 */

package com.divintech.testing;


import org.jawin.io.LittleEndianInputStream;
import org.jawin.io.LittleEndianOutputStream;
import org.jawin.marshal.GenericStub;
import java.util.ArrayList;
import java.io.IOException;

/**
 *
 * @author  alexandrek
 */
public class PRINTDLG {
   // This comes to 66: 6 ints followed by 5 shorts, then 4 ints, 2
Strings, and 2 ints. total of 19 members.
    public static final int size = 6*4 + 5*2 + 4*4 + 2*4 + 2*4;

    public int lStructSize;
    public int  hwndOwner;
    public int  hDevMode;
    public int  hDevNames;
    public int  hDC;
    public int  Flags;
    public short  nFromPage;
    public short  nToPage;
    public short  nMinPage;
    public short  nMaxPage;
    public short  nCopies;
    public int  hInstance;
    public int  lCustData;
    public int  lpfnPrintHook;
    public int  lpfnSetupHook;
    public String  lpPrintTemplateName;
    public String lpSetupTemplateName;
    public int  hPrintTemplate;
    public int  hSetupTemplate;

    public void marshal(LittleEndianOutputStream leos, ArrayList objs)
             throws IOException {
        leos.writeInt(lStructSize);
        leos.writeInt(hwndOwner);
        leos.writeInt(hDevMode);
        leos.writeInt(hDevNames);
        leos.writeInt(hDC);
        leos.writeInt(Flags);
        leos.writeShort(nFromPage);
        leos.writeShort(nToPage);
        leos.writeShort(nMinPage);
        leos.writeShort(nMaxPage);
        leos.writeShort(nCopies);
        leos.writeInt(hInstance);
        leos.writeInt(lCustData);
        leos.writeInt(lpfnPrintHook);
        leos.writeInt(lpfnSetupHook);
        leos.writeStringUnicode(lpPrintTemplateName);
        leos.writeStringUnicode(lpSetupTemplateName);
        leos.writeInt(hPrintTemplate);
        leos.writeInt(hSetupTemplate);
    }

}




Regards,

Alex Kotchnev
Developer / Systems Analyst
Diversified Information Technologies

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