Function Call in .onInit and un.oninit

Is there a chance, that both .onInit and un.oninit can call the same function instead of duplicating the function explicitely for un.oninit.

e.g.

Function .onInit
Call MyFunction
FunctionEnd

Function un.onInit
Call MyFunction # problem: needs un.
FunctionEnd

Function MyFunction
# many code lines
FunctionEnd

To solve the problem I don't want to duplicate MyFunction to have un.MyFunction.

Use macro

;--------------------------------

; Macro



!macro TerminateApp



    DetailPrint "${STOPPING}"

    fct::fct /WC '${WND_CLASS}' /WTP '${PROG_NAME}' /TIMEOUT 2000 /QUESTION '${TERM_MSG}'

    Pop $0

    StrCmp $0 "-1" 0 +2

    Abort "${ABORTED}" 



!macroend



Section "${PROG_NAME}" SEC_1



  SectionIn RO

  

  !insertmacro TerminateApp

...