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    CtrlD()/CtrlE()/CtrlF()

  SYNOPSIS
    bool:=CtrlD()
    bool:=CtrlE()
    bool:=CtrlF()

  FUNCTION
    Function checks for breaks and returns TRUE if the signal was
    received

  INPUTS
    none

  RESULT
    bool - holds TRUE if break was received

  SEE ALSO