实例代码如下： 

Imports System
Imports System.Text
Imports System.Runtime.InteropServices

Namespace Lob_ini

    Public Class cIni

        Private ls_IniFilename As String

        Private li_BufferLen As Integer = 256

        ''' <summary>
        ''' cINI Constructor
        ''' </summary>
        Public Sub New(ByVal pIniFilename As String)
            MyBase.New()
            ls_IniFilename = pIniFilename
        End Sub

        ''' <summary>
        ''' INI filename (If no path is specifyed the function will look with-in the windows directory for the file)
        ''' </summary>
        Public Property IniFile() As String
            Get
                Return
            End Get
            Set(ByVal value As String)
                ls_IniFilename = value
            End Set
        End Property

        ''' <summary>
        ''' Max return length when reading data (Max: 32767)
        ''' </summary>
        Public Property BufferLen() As Integer
            Get
                Return li_BufferLen
            End Get
            Set(ByVal value As Integer)
                If (value > 32767) Then
                    li_BufferLen = 32767
                ElseIf (value < 1) Then
                    li_BufferLen = 1
                Else
                    li_BufferLen = value
                End If
            End Set
        End Property

        Private Declare Function WritePrivateProfileString Lib "kernel32" (ByVal pSection As String, ByVal pKey As String, ByVal pValue As String, ByVal pFile As String) As Integer

        Private Declare Function WritePrivateProfileStruct Lib "kernel32" (ByVal pSection As String, ByVal pKey As String, ByVal pValue As String, ByVal pValueLen As Integer, ByVal pFile As String) As Integer

        Private Declare Function GetPrivateProfileString Lib "kernel32" (ByVal pSection As String, ByVal pKey As String, ByVal pDefault As String, ByVal prReturn() As Byte, ByVal pBufferLen As Integer, ByVal pFile As String) As Integer

        Private Declare Function GetPrivateProfileStruct Lib "kernel32" (ByVal pSection As String, ByVal pKey As String, ByVal prReturn() As Byte, ByVal pBufferLen As Integer, ByVal pFile As String) As Integer

        ''' <summary>
        ''' Read value from INI File
        ''' </summary>
        Public Overloads Function ReadValue(ByVal pSection As String, ByVal pKey As String, ByVal pDefault As String) As String
            Return z_GetString(pSection, pKey, pDefault)
        End Function

        ''' <summary>
        ''' Read value from INI File, default = ""
        ''' </summary>
        Public Overloads Function ReadValue(ByVal pSection As String, ByVal pKey As String) As String
            Return z_GetString(pSection, pKey, "")
        End Function

        ''' <summary>
        ''' Write value to INI File
        ''' </summary>
        Public Sub WriteValue(ByVal pSection As String, ByVal pKey As String, ByVal pValue As String)
            WritePrivateProfileString(pSection, pKey, pValue, Me.ls_IniFilename)
        End Sub

        ''' <summary>
        ''' Remove value from INI File
        ''' </summary>
        Public Sub RemoveValue(ByVal pSection As String, ByVal pKey As String)
            WritePrivateProfileString(pSection, pKey, Nothing, Me.ls_IniFilename)
        End Sub

        ''' <summary>
        ''' Read values in a section from INI File
        ''' </summary>
        Public Sub ReadValues(ByVal pSection As String, ByRef pValues As Array)
            pValues = z_GetString(pSection, Nothing, Nothing).Split(CType(ChrW(0), Char))
        End Sub

        ''' <summary>
        ''' Read sections from INI File
        ''' </summary>
        Public Sub ReadSections(ByRef pSections As Array)
            pSections = z_GetString(Nothing, Nothing, Nothing).Split(CType(ChrW(0), Char))
        End Sub

        ''' <summary>
        ''' Remove section from INI File
        ''' </summary>
        Public Sub RemoveSection(ByVal pSection As String)
            WritePrivateProfileString(pSection, Nothing, Nothing, Me.ls_IniFilename)
        End Sub

        ''' <summary>
        ''' Call GetPrivateProfileString / GetPrivateProfileStruct API
        ''' </summary>
        Private Function z_GetString(ByVal pSection As String, ByVal pKey As String, ByVal pDefault As String) As String
            Dim sRet As String = pDefault
            Dim bRet() As Byte = New Byte((li_BufferLen) - 1) {}
            Dim i As Integer = GetPrivateProfileString(pSection, pKey, pDefault, bRet, li_BufferLen, ls_IniFilename)
            sRet = System.Text.Encoding.GetEncoding(1252).GetString(bRet, 0, i).TrimEnd(CType(ChrW(0), Char))
            Return sRet
        End Function
    End Class
End Namespace