🚀 go-pugleaf

Hello,
I am a very new Java programmer with some difficulties.

I am trying to run a Windows (C++) DLL MyWindow from within Java becuase the
DLL has some functionality that I need for the Windows platform.  The
controlling Java class (also MyWindow) is quoted below.  I find if I put all
the components in one directory, and run them from the commandline, there is
no problem.  However, if I run it from within JBuilder Personal, I get the
following error:

java.lang.UnsatisfiedLinkError: initialize
 at lpsemail.MyWindow.initialize(Native Method)
 at lpsemail.MyWindow.addNotify(MyWindow.java:46)

It would seem that it can find the DLL, but cannot find the native routine
"initialize" within it.  I got a different error previously when it couldn't
find MyWindow.DLL at all.  So far I have put the DLL in the root directory
of the JBuilder project.  As I do all my work in JBuilder this problem
drives me nuts.  I have not changed the classpath or path, as when I run it
from the commandline, none of that is needed.

I would be very grateful for any suggestions as to why it cannot find the
"initialize" routine inside the DLL.
Thanks,
Paul Trimming


package lpsemail;

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.awt.peer.*;
import sun.awt.*;

public class MyWindow extends Canvas
{
   String m_strURL = "http://www.javasoft.com";
    static
    {
        // Load the library that contains the JNI code.
        System.loadLibrary("MyWindow");
    }

    // native entry point for initializing the IE control.
    public native void initialize(int hwnd, String strURL);

    // native entry point for resizing
    public native void resizeControl(int hwnd, int nWidth, int nHeight);

    // Returns the HWND for panel. This is a hack which works with
    // JDK1.1.8, JDK1.2.2 and JDK1.3. This is undocumented. Also
    // you should call this only after addNotify has been called.
    public int getHWND()
    {
        int hwnd = 0;
        DrawingSurfaceInfo drawingSurfaceInfo =
((DrawingSurface)(getPeer())).getDrawingSurfaceInfo();
        if (null != drawingSurfaceInfo)
  {
            drawingSurfaceInfo.lock();
            Win32DrawingSurface win32DrawingSurface =
(Win32DrawingSurface)drawingSurfaceInfo.getSurface();
            hwnd = win32DrawingSurface.getHWnd();
            drawingSurfaceInfo.unlock();
        }
        return hwnd;
    }

    public void addNotify()
    {
        super.addNotify();
        m_hWnd = getHWND();
        initialize(m_hWnd, m_strURL);
    }


    int    m_hWnd   = 0;

    public void getURL() {
    initialize(m_hWnd, m_strURL);
    }


    public void setSize( int width, int height )
    {
        super.setSize(width,height);
        if(m_hWnd!=0)
            resizeControl(m_hWnd, width, height);
    }

    public void setSize( Dimension d )
    {
        super.setSize(d);
        if(m_hWnd!=0)
            resizeControl(m_hWnd, d.width, d.height);
    }

    public void setBounds( int x, int y, int width, int height )
    {
        super.setBounds(x,y,width,height);
        if(m_hWnd!=0)
            resizeControl(m_hWnd, width, height);
    }

    public void setBounds( Rectangle r )
    {
        super.setBounds(r);
        if(m_hWnd!=0)
            resizeControl(m_hWnd, r.width, r.height);
    }
}