Automation on Navision Testing

We are in the process of automating ERP “Navison classic” using automation tool “Test complete”, we are facing problem in identifying the Navison forms & its controls,
Test complete works by identifying the window handle & its window class names.

we tried using Microsoft spy++ (this tool comes with Visual studio 6 & later version) for getting the class name for each of the controls, but even spy++ is unable to locate/identify Navision forms & all other controls.

Al we need to know is the platform in which Navision classic is developed & its form hierarchy. along with its window class name for each of the element & control

Controls we mean , Text box’s , combo box & buttons … etc

element we mean, window, MDIchildwindow, pane, grid, tabcontrol etc

Note : Not on Navision Designer Mode ( Form )