>The Forms collection will contain all the loaded forms within the project. but how to get the names of other forms within the project which is not loaded
>
>Any Idea Please?

You can do this with a VB add-in project. Basically you would use the VBProjects, VBComponents collection (VB Extensibility model) and the VBProject and VBComponent objects.

In your add-in code, you would put something like:

   For Each vbProject In VBInstance.VBProjects
      For Each vbComponent In vbProject.VBComponents
         Debug.Print vbComponent.Name, vbComponent.Type
      Next vbComponent
   Next vbProject

For more information, read the "Roll your own Add-ins" article in your MSDN library CD.
HTH