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extern "C" __declspec(dllexport)
HRESULT __stdcall Connect(LPCSTR IpAddr)
{
...
}

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Private Declare Function Connect Lib "example.dll" Alias "_Connect@4" (ByVal IpAddr As String) As Long

Dim result As Long

result = Connect("138.139.0.230")

If result <> 0 Then

  MsgBox ("error_connect")

Else

  MsgBox ("connect_ok")
   
End If

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extern "C" __declspec(dllexport)
HRESULT Connect(LPCSTR IpAddr)
{
...
}

VB.NET´úÂëÈçÏ£º

Imports System.Runtime.InteropServices

<DllImport("./example.dll", CallingConvention:=CallingConvention.Cdecl)> _
  Public Function Connect(ByVal IpAddr As String) As Integer
  End Function

Dim result As Integer

result = Connect("138.139.0.230") 'Á¬½Óµ¥°å

If result &


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