I am getting System.Runtime.InteropServices.MarshalDirectiveException exception when trying to implement following code in j

private static class RegKin

private int m_regkind
public static int RegKind_Default = 0
public static int RegKind_Register = 1
public static int RegKind_None = 2
RegKind(int n

m_regkind = n

} //RegKin

/** @attribute DllImport("oleaut32.dll", CharSet = CharSet.Unicode, PreserveSig = false
* *
private static native void LoadTypeLibEx(String strTypeLibName, RegKind regKind
/** @attribute MarshalAs(UnmanagedType.Interface
* */Object typeLib[])

public static void main(String[] args

Object typeLib[] = new Object[1]
LoadTypeLibEx("SHDocVw.dll", new RegKind(RegKind.RegKind_None), typeLib)
if ( typeLib[0] == null )
Console.WriteLine("LoadTypeLibEx failed.")
return

TypeLibConverter converter = new TypeLibConverter()
ConversionEventHandler eventHandler = new ConversionEventHandler()
AssemblyBuilder asm = converter.ConvertTypeLibToAssembly(typeLib[0], "ExplorerLib.dll", (TypeLibImporterFlags)0,(ITypeLibImporterNotifySink) eventHandler, null, null, null, null)
asm.Save("ExplorerLib.dll")
} //Mai

Does any one know why this is happenin

Thanks Bob
That just helped me
But Can you tell me wht that is showing such behaviour
Why can't we use Object [] there and use MarshalAs(UnmanagedType.Interface)

Thanks

Try using an int[] in place of an Object[] for the out param. Then, you
can wrap the pointer. The following revision worked for me:

import System.Runtime.InteropServices.*;

public class Test
{

public static void main(String[] args)
{
int[] tl = {0};
LoadTypeLibEx("SHDocVw.dll", RegKind.RegKind_None, tl);
UCOMITypeLib iface = (UCOMITypeLib)Marshal.GetObjectForIUnknown(new
System.IntPtr(tl[0]));
System.out.println("info count = "+iface.GetTypeInfoCount());
}

/** @attribute DllImport("oleaut32.dll", CharSet = CharSet.Unicode,
PreserveSig = false)
* */
private static native void LoadTypeLibEx(String strTypeLibName, int
regKind,
int[] typeLib);



private static class RegKind
{
private int m_regkind ;
public static int RegKind_Default = 0;
public static int RegKind_Register = 1;
public static int RegKind_None = 2;
RegKind(int n)
{
m_regkind = n;
}
} //RegKind

}

Does any one know why this is happening
Thanks
[quoted text, click to view]

Bob LaCasse
Microsoft Developer Support - Visual J#.NET

This posting is provided AS IS with no warranties, and confers no rights.

Hi - This is a 'too many levels of indirection' problem, because JSharp
doesn't support passing by reference.

In JSharp, an int[] is the only way to do in/out, out or retval params,
unless you are dealing with strings.

With strings, you can pass a BSTR in or get a BSTR returned as a string,
but you have to use StringBuffer to have a parameter value changed or set
by the callee.

This API returns the interface in a pointer to an interface pointer, which
other languages can support by marshalling a by-ref param as a native
interface, which amounts to passing an interface pointer by reference.

But Can you tell me wht that is showing such behaviour?
Why can't we use Object [] there and use MarshalAs(UnmanagedType.Interface)?

Thanks .
Sushila
[quoted text, click to view]

Bob LaCasse
Microsoft Developer Support - Visual J#.NET

This posting is provided AS IS with no warranties, and confers no rights.