在PowerShell中通过引用传递参数

function Find-NewMessages($valvar1, [REF]$refvar1, [REF]$refvar2) { 
  //some stuff 
  $refvar1.Value = “hi”  #注意，此处一定要是$refvar1.Value，而不能直接用$refvar1
  $refvar2.Value = “bye” 
}

然后在调用时
$refvar1 = “1”
$refvar2  “2”
Find-NewMessages $valvar1 ([REF]$refvar1) ([REF]$refvar2)
//now $refvar1 = “hi” and $refvar2 = “bye”