I found my solution. I use AutoIt scripting extensively for things other than DLLs and WM6 work for which I use CPP and C# respectively. If I am doing portable stuff I use Java as I work with both Windows and several flavors of Linux.
Anyway, AutoIt has an almost complete set of functions for the Windows API and I found the function that turns off the menubar on any window that uses the Windows menu API.
The code is very simple and I call the script whenever the embedded application is executed which is primarily by "LOAD".
Just for anyone's future reference I've attached the appropriate AutoIt code fragment.
$AWC_Hwnd = WinGetHandle("[CLASS:<name of main window class>]", "")
_GUICtrlMenu_SetMenu($AWC_Hwnd, 0) ; a zero in the second parm removes the menu