Thanks to the work of Paul Piko there is the possibility to add a WinForms to a VO GUI application.

These are the steps:

• Instead of using the “normal” App class from the VO GUI classes use the VOWinFormApp class (contained in the X# VO GUI classes window)

[STAThreadAttribute];
function Start( asCmdLine as string[] ) as int
  local oMainWindow as StandardShellWindow
  local oApp as VOWinFormApp // App
 
  oApp := VOWinFormApp{} // App{}
 
  oMainWindow := StandardShellWindow{oApp}
  oMainWindow:Show(SHOWCENTERED)
 
  oApp:Exec()
 
  return 0

• when opening your Windows Forms window, use a ChildWinForm object as owner:

local oForm as MyWinForm
  local oChild as ChildWinForm
 
  oChild := ChildWinForm{ self, true }
  oChild:Menu := StandardShellMenu{ oChild }
  oForm := MyWinForm{ oChild }
  oChild:WinForm := oForm
  oChild:Show()

• when you need to close your Windows form, call the :EndWindow() method of your ChildWinForm owner object:

method CloseButtonClick(sender as System.Object , e as System.EventArgs) as void
 
  _oOwner:EndWindow()
  return

You can find a sample of such an application here (in form of a XIDE export file): www.riedmann.it/download/VOGuiWinforms.zip