C#

先  using System.Runtime.InteropServices;

然後

[DllImport("ABC.dll", EntryPoint = "Send")]
public static extern boolABCSend(string );

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VB.NET

先  Imports System.Runtime.InteropServices

然後

<DllImport("ABC.dll", EntryPoint = "Send")> public Shared Function  ABCSend(Byval  Msg As String) as bool

End Function