Here is my code:

using System;
using fvw;

namespace ITS
{
 public class FalconView
 {
   private int hLayer;
   private fvw.LayerClass layer;

   public FalconView()
   {
     hLayer = -1;
     layer = new LayerClass();
   }

   public void Open(string clientName,
     Int32 windowHandle,  object dispatchPtr)
   {
     int result;
     result = layer.RegisterWithMapServer  
      (clientName,windowHandle,dispatchPtr);
     hLayer = layer.CreateLayer("ITS");
   }
I have a form that calls this class.
When I call open from my main application I get InvalidCastException
Error.  I think this is because layer is null.  The reason I say this is
because when I create a new FalconView object.  The FalconView software
kicks off and then immediately closes.  The leads me to believe that my
object is possibly being cleaned up by the garbage collector.  If I bind
the LayerClass object in the open method I dont get this error.  Also,
if run the application again then everything runs fine.  So this code
basically works every other time that is called.  I cant explain why
this is happening.

Here is the code:

using System;
using fvw;

public class FalconView
{
 private int hLayer;
 private fvw.LayerClass layer;

 public FalconView()
 {
   hLayer = -1;
   layer = new LayerClass();
 }

 public void Open(string clientName, Int32 windowHandle,
   object dispatchPtr)
 {
   int result;
   result = layer.RegisterWithMapServer
    (clientName,windowHandle,dispatchPtr);
   hLayer = layer.CreateLayer("ITS");
 }
}
       
I have a main application that calls this class.  When I create a
FalconView object from this class, the FalconView software kicks off and
then immediately closes.  Then when i call the open method, I get an
InvalidTypeCastException.  Which I believe is because layer is null.  If
I close FalconView and my main application and run the program again
everything works fine.  So this code is working every other time it is
called.  I cant explain why this is happening.  Also if I instantiate my
LayerClass object inside of the Open method I dont get the
InvalidTypeCast error.