源代码清单如下：Private Sub MDIForm_Load()End SubPrivate Sub mnuExamination_Click() frmMarks.ShowEnd SubPrivate Sub mnuExit_Click() If MsgBox("确实要退出吗?", vbOKCancel + vbQuestion, "系统退出") = vbOK Then Unload Me Else Exit Sub End IfEnd SubPrivate Sub mnuStudent
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Public Function findstr(ByRef instring As String, after As String, before As String, rewind As Boolean) As String ’instring母串，after前面字符,before后面字符,rewind从头开始查找
