Function .onSelChange
  SectionGetFlags ${dlaion} $2
  SectionGetFlags ${update} $3
  SectionGetFlags ${eudeusec} $4
  ${If} $3 == 1
  ${If} $2 == 1
  SectionSetFlags ${update} ${SF_RO}
  ${ElseIf} $2 == 0
  SectionSetFlags ${update} 1
  ${EndIf}
  ${Else}
  SectionSetFlags ${update} 0
  ${EndIf}

  ${If} $4 == 1
  ${If} $2 == 1
  SectionSetFlags ${eudeusec} ${SF_RO}
  ${ElseIf} $2 == 0
  SectionSetFlags ${eudeusec} 1
  ${EndIf}
  ${Else}
  SectionSetFlags ${eudeusec} 0
  ${EndIf}
FunctionEnd