主题：递归函数的不理解

Dim nd As WinForm.TreeNode = args(0)
Dim dt As DataTable = args(1)
For Each dr As DataRow In dt.DataRows
    Dim km As String = dr("科目代码")
    If km.StartsWith(nd.name) AndAlso km.Length = nd.Name.Length + 2 Then
        Dim cd As Winform.TreeNode = nd.Nodes.Add(km,km & " " & dr("科目名称"))
        Functions.Execute("AddChildren",cd,dt)
    End If
Next

args(0) 这是什么意思

args(1) 这又是什么意思