.NET

[#1]

Unfortunately, ARX 2007 does not provide Autodesk.AutoCAD.Internal.Utils.SetFocusToDwgView().

What would be the best way to mimic this method?

[#2]

Try this code (not the same as SetFocusToDwgView but can be helpful):

[DllImport("user32.dll")]
extern static IntPtr SetFocus(IntPtr hWnd);
static void SetFocusToActiveDocument()
{
  SetFocus(Application.DocumentManager.MdiActiveDocument.Window.Handle);
}
static void SetFocusToMainWindow()
{
  SetFocus(Application.MainWindow.Handle);
}