macro(ensure_props_set projectFile)
  if(NOT EXISTS "${projectFile}")
    message(FATAL_ERROR "Project file ${projectFile} does not exist.")
    return()
  endif()

  set(SourcePropertyFound FALSE)
  set(DebugTargetPropertyFound FALSE)
  set(ReleaseTargetPropertyFound FALSE)

  file(STRINGS "${projectFile}" lines)
  foreach(line IN LISTS lines)
    if(line MATCHES "<SourceProperty1.*Debug.*>SourceProperty1Value</SourceProperty1>")
      message("SourceProperty1 setting found")
      set(SourcePropertyFound TRUE)
    endif()

    if(line MATCHES "<TargetProperty1.*Debug.*>TargetProperty1ValueDebug</TargetProperty1>")
      message("Debug TargetProperty1 setting found")
      set(DebugTargetPropertyFound TRUE)
    endif()

    if(line MATCHES "<TargetProperty1.*Release.*>TargetProperty1ValueRelease</TargetProperty1>")
      message("Release TargetProperty1 setting found")
      set(ReleaseTargetPropertyFound TRUE)
    endif()
  endforeach()

  if (NOT SourcePropertyFound)
    message(FATAL_ERROR "SourceProperty1 setting not found")
    return()
  endif()

  if (NOT DebugTargetPropertyFound)
    message(FATAL_ERROR "Debug TargetProperty1 setting not found")
    return()
  endif()

  if (NOT ReleaseTargetPropertyFound)
    message(FATAL_ERROR "Release TargetProperty1 setting not found")
    return()
  endif()
endmacro()

ensure_props_set("${vcxproj}")