C#

using System;
using System.Runtime.InteropServices

//this class is unmanaged code
class UnmanagedAccessDll
{
//use to import your method in your dll
  [DllImport("myDll.dll")]
public static extern void StartWizard([required parameters if any]);
}
//sample managed class code
public ManagedAccessDll
{
  public void Startwizard([required parameters if any]){
UnmanagedAccessDll.Startwizard([required parameters if any]);
}
} 

or you can call directly in your code

...
UnmanagedAccessDll.Startwizard([required parameters if any]);
...

// This method has many options - check MSDN
TreeNode node = new TreeNode("Node Text"); 
treeView1.Nodes.Add(node);

Form2 form2 = new Form2();
form2.MdiParent = this;
form2.Show();

stovesy wrote:

My factory objects all derive from a FactoryBase class.
The FactoryBase class is generic (FactoryBase<t> where T : IBusinessObjectBase)
I have an IFactoryBase interface, which the FactoryBase impliments.
public interface IFactoryBase<t> where T : IBusinessObjectBase

class FactoryBase<t> : IFactoryBase<t> where T : IBusinessObjectBase ...</t></t>

stovesy wrote:

I've just not show that in code.

stovesy wrote:

IFactoryBase<ibusinessobjectbase>

stovesy wrote:

We're getting to the crux of the matter.

stovesy wrote:

What you suggest does work, but I don't know the type of the generic class, only that it derives from IBusinessObjectBase

So when I try ...(customerFactory is IFactoryBase).... it fails.

arkiboys wrote:

//in winform I am using this which works fine...
_watcher.SynchronizingObject = this;

//this line does not compile in windows service. Please note I changed the word this to the service class name i.e. FileMonitor

FileMonitor FM = new FileMonitor();
_watcher.SynchronizingObject = fileMonitor;