nsis安装、卸载时如何判断程序是否正在运行 并提示关闭？

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!include logiclib.nsh
FindProcDLL::FindProc "Test.exe"
StrCmp $R0 1 0 +2

messagebox::show MB_SETFOREGROUND|MB_ICONHAND|MB_DEFBUTTON3|MB_TOPMOST "${PRODUCT_NAME}" "" \
        '检测到程序正在运行，是否立即终止程序？$\n$\n\
        【终止】终止程序，继续卸载$\n\
        【取消】取消卸载' \
         "终止" "取消"
Pop $0

${If} $0 == 1
  KillProcDLL::KillProc "Test.exe"
${Elseif} $0 == 2
  Abort
${EndIf}
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