// Called just after invoking the COM method. The IntPtr is the same one that just got returned
// from MarshalManagedToNative. The return value is unused.
public object MarshalNativeToManaged(IntPtr pNativeData)
{
Marshal.PtrToStructure(pNativeData, m_prop);
m_prop = null;
return m_prop;
}
// It appears this routine is never called
public void CleanUpManagedData(object ManagedObj)
{
m_prop = null;
}
public IntPtr MarshalManagedToNative(object managedObj)
{
IntPtr p;
// Cast the object back to a PropVariant
m_prop = managedObj as PropVariant;
if(m_prop != null)
{
// Release any memory currently allocated
m_prop.Clear();
// Create an appropriately sized buffer, blank it, and send it to
// the marshaler to make the COM call with.
int iSize = GetNativeDataSize();
p = Marshal.AllocCoTaskMem(iSize);
if(IntPtr.Size == 4)
{
Marshal.WriteInt64(p, 0);
Marshal.WriteInt64(p, 8, 0);
}
else
{
Marshal.WriteInt64(p, 0);
Marshal.WriteInt64(p, 8, 0);
Marshal.WriteInt64(p, 16, 0);
}
}
else
{
p = IntPtr.Zero;
}
return p;
}
public void Copy(PropVariant pval)
{
if(pval == null)
{
throw new Exception("Null PropVariant sent to Copy");
}
pval.Clear();
PropVariantCopy(pval, this);
}
