Unloads VBA applications from AutoCAD 64-bit installations preversion 2014 so it can resume normal speed. See http://adndevblog.typepad.com/autocad/2012/05/64-bit-vba-performance-issue.html

UnVBA for AutoCAD

(defun Get-VBA-Project-list (/ ACAD VBAO PRO N NAMES)
  (vl-load-com)
  (if (and
        (setq ACAD (vlax-get-acad-object))
        (setq VBAO (vla-get-vbe ACAD))
        (setq PROs (vlax-get VBAO "VBProjects"))
      ) ;_ -and

    (repeat (setq N (vla-get-count PROs))
      (setq PRO   (vla-item PROs N)
            NAMES (cons
                    (list
                      (vlax-get PRO "Name")
                      (vlax-get PRO "FileName")
                    ) ;_ -list
                    NAMES
                  ) ;_ -cons
            N     (1- N)
      ) ;_ -setq
    ) ;_ -repeat
  ) ;_ -if
  NAMES
) ;_ -defun

(defun C:UNVBA (/ app apps)
  (setq apps (Get-VBA-Project-List))
  (foreach app apps
    (command "_VBAUNLOAD" (cadr app))
    (princ (strcat (cadr app) " unloaded\n"))
    (princ)
  ) ;_ -foreach
  (princ)
  (graphscr)
) ;_ -defun