How detect launch NSIS installer with arguments

Question

I have NSIS installer. How detect launch NSIS installer with arguments?

For example installer.exe /DEBUG

Answer 1

GetOptions:

!include FileFunc.nsh
!include LogicLib.nsh

Function .onInit
${GetParameters} $0
ClearErrors
${GetOptions} $0 "/DEBUG" $1
${IfNot} ${Errors}
    MessageBox mb_ok "Debug"
${EndIf}
FunctionEnd