(IF SPECIAL
    (SPECIAL '(olde ptest cavar bell prna))
    (DEFUN SPECIAL (x) nil)
)
(DEFUN pstart (tit qust setv / xlen xpos xvar)
    (SETQ olde *ERROR*
          *ERROR* (IF ptest NIL errhan)
          cavar (APPEND '(("CLAYER")("CMDECHO"))
                    setv)
          xlen (LENGTH cavar)
          xpos 0
    )
    (REPEAT xlen
        (SETQ xvar (CAR (NTH xpos cavar))
              cavar (SUBST (CONS xvar (GETVAR xvar))
                          (NTH xpos cavar) cavar)
              xpos (1+ xpos)
        )
    )
    (SETVAR "CMDECHO" 0)
    (COMMAND "ZURšCK" "GRUPPE")
;          (COMMAND "ZURUECK" "GRUPPE")  ;fr Version 10
    (GRAPHSCR)
    (PROMPT (STRCAT "\n***** " tit " *****\n\n  " qust))
    (PRINC)
)
(DEFUN pend (/ xpos xlen xvar)
    (IF cavar
        (PROGN
            (COMMAND)
            (COMMAND "ZURšCK" "E")
;           (COMMAND "ZURUECK" "E")  ;fr Version 10
            (SETQ xpos 1
                  xlen (LENGTH cavar)
            )
            (IF (/= (GETVAR "CLAYER") (CAAR cavar))
                        (COMMAND "LAYER" "SE" (CDAR CAVAR) "")
            )
            (REPEAT (1- xlen)
                (SETQ xvar (NTH xpos cavar)
                      xpos (1+ xpos)
                )
                (SETVAR (CAR xvar)(CDR xvar))
            )
        )
    )
    (IF olde (SETQ *ERROR* olde))
    (PRINC)
)
(DEFUN errhan (em)
    (IF (= em "Function cancelled")
        (PRINC)
        (PRINC em)
    )
    (GRTEXT)
    (COMMAND)
    (COMMAND)
    (pend)
)
(DEFUN ques (dial defa)                         ;Std Abfrage
    (IF defa
        (PROGN
            (INITGET 1 "Ja Nein  Ja")
            (= (GETKWORD (STRCAT "\n" dial " J/N <J>: ")) "Nein")
        )
        (PROGN
            (INITGET 1 "Ja Nein  Nein")
            (= (GETKWORD (STRCAT "\n" dial " J/N <N>: ")) "Ja")
        )
    )
)
(DEFUN emsg (etxt)
    (IF (NOT bell)(PROMPT "\007"))
    (TERPRI)
    (PROMPT etxt)
    (TERPRI)
)
(DEFUN ques (dial defa)                         ;Std Abfrage
   (IF defa
      (PROGN
         (INITGET 1 "Ja Nein  Ja")
         (= (GETKWORD (STRCAT "\n" dial " J/N <J>: ")) "Nein")
      )
      (PROGN
         (INITGET 1 "Ja Nein  Nein")
         (= (GETKWORD (STRCAT "\n" dial " J/N <N>: ")) "Ja")
      )
   )
)
(DEFUN renv (envn prnn / penv)
    (IF (SETQ penv (GETENV envn))
        (EVAL (STRCAT penv "" prnn))
        (EVAL prnn)
    )
)
(DEFUN C:PRG (/ nprg cprg prna)
    (SETQ nprg (GETSTRING)
          cprg (STRCAT "C:" nprg)
          prna (renv "ACADLSP" nprg)
    )
    (IF (NULL (EVAL (READ cprg)))
        (PROGN
            (PRINC " wird geladen!\n")
            (COND
                ((FINDFILE (STRCAT prna ".BI4"))
                             (LOAD prna ".BI4"))
                ((FINDFILE (STRCAT prna ".BI2"))
                             (LOAD prna ".BI2"))
                ((FINDFILE (STRCAT prna ".LSP"))
                             (LOAD prna ".LSP"))
                ( T        (emsg "Datei nicht gefunden"))
            )
        )
    )
    (PRINC)
)
(DEFUN C:ed (/ prnn)
    (IF (NULL prna)
        (SETQ prna "")
    )
    (SETQ prnn (GETSTRING
                    (STRCAT "Programmname  <" prna ">: ")))
    (IF (AND (= (STRLEN prna) 0)(= (STRLEN prnn) 0))
        (emsg "kein gltiger Name!")
        (PROGN
            (IF (> (STRLEN prnn) 0)
                (SETQ prna (renv "ACADLSP" prnn))
            )
            (COMMAND "SHELL" (STRCAT "ED " prna ))
            (INITGET 1 "Ja Nein  Ja")
            (IF (NOT (ques "Pragramm laden" T))
                (LOAD prna)
            )
        )
    )
    (PRINC)
)