clsini.cls

一个VB实现串口通讯的经典示例.非常简明, 使用, 本人大部分通讯程序与之类同

VERSION 1.0 CLASS
BEGIN
  MultiUse = -1  'True
  Persistable = 0  'NotPersistable
  DataBindingBehavior = 0  'vbNone
  DataSourceBehavior  = 0  'vbNone
  MTSTransactionMode  = 0  'NotAnMTSObject
END
Attribute VB_Name = "clsIni"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Option Explicit

Private m_FileName As String

Public Property Get FileName() As String
    FileName = m_FileName
End Property

Public Property Let FileName(ByVal sFilename As String)
    m_FileName = sFilename
End Property

Public Function GetVar(ByVal sTag As String) As Variant
Dim iFH As Integer, sLine As String, sVarName As String
Dim sBuf As String, Result As Variant, iEqualPos As Integer
    
    sBuf = Dir(m_FileName)
    If m_FileName = "" Or sBuf = "" Then
        Exit Function
    End If
    
    iFH = FreeFile
    On Error GoTo clsIni_Read_Error
    Open m_FileName For Input As #iFH
    Do While Not EOF(iFH)
        Input #iFH, sLine
        sLine = Trim(sLine)
        If sLine = "" Or Left(sLine, 1) = ";" Or Left(sLine, 1) = "#" Or Left(sLine, 1) = "'" Then GoTo clsIni_Read_Loop
        
        iEqualPos = FindChar("=", sLine)
        If iEqualPos <> 0 Then
            sVarName = LCase(Trim(Left(sLine, iEqualPos - 1)))
            If sVarName = LCase(sTag) Then
                Result = Trim(Mid(sLine, iEqualPos + 1))
                Exit Do
            End If
        End If
        
clsIni_Read_Loop:
    Loop
    Close #iFH
    iFH = 0
    
clsIni_Read_Error:
    If Err <> 0 Then
        MsgBox "Err #" & Err.Number & " : " & Err.Description, vbOKOnly, "Error in clsIni"
    End If
    On Error GoTo 0
    If iFH <> 0 Then Close #iFH
    
    GetVar = Result
End Function