这一段vb代码用托管VC++重写，应该怎样做呢？

[Anakin_Skywalker]

Dim arenaApp As Arena.Application
arenaApp = GetObject("", "Arena.Application")
If arenaApp.Models.Count = 0 Then
MsgBox("No model opened. This proccess is gonna be terminated.")
Dispose()
Else
arenaModel = arenaApp.Models.Item(1)
arenaSiman = arenaModel.SIMAN
tbSpeed.Text = Me.arenaModel.RunSpeed
End If

由于托管扩展代码中，只能用这种类型的指针，所以我就分不清::、->和.了

如果你能帮我改写一下保证能用，也请你帮我讲一下这几个运算符的异同吧，谢谢！

[strongerman]

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