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我在很久以前就实现了这个方法了。它没有采用任何的控件形式,也没有调用系统API函数FindFirst,FindNext进行递归调用,和别人有点不同的就是我用的是VB中的Dir()函数。事实上,直接采用Dir()函数是不能进行自身的递归的调用的,但我们可以采用一种办法把Dir将当前搜索目录的子目录给保存下来,然后在自身的search(strPathName)递归函数中依次进行递归的调用,这样就可以把指定的目录搜索完毕。 具体代码如下:
 
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 '函数GetExtName
 '功能:得到文件后缀名(扩展名)
 '输入:文件名
 '输出:文件后缀名(扩展名)
 
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 Public Function GetExtName(strFileName As String) As String
 Dim strTmp As String
 Dim strByte As String
 Dim i As Long
 For i = Len(strFileName) To 1 Step -1
 strByte = Mid(strFileName, i, 1)
 If strByte <> "." Then
 strTmp = strByte + strTmp
 Else
 Exit For
 End If
 Next i
 GetExtName = strTmp
 End Function
 
 Public Function search(ByVal strPath As String, Optional strSearch As String = "") As Boolean
 Dim strFileDir() As String
 Dim strFile As String
 Dim i As Long
 
 Dim lDirCount As Long
 On Error GoTo MyErr
 If Right(strPath, 1) <> "\" Then strPath = strPath + "\"
 strFile = Dir(strPath, vbDirectory Or vbHidden Or vbNormal Or vbReadOnly)
 While strFile <> "" '搜索当前目录
 DoEvents
 If (GetAttr(strPath + strFile) And vbDirectory) = vbDirectory Then '如果找到的是目录
 If strFile <> "." And strFile <> ".." Then '排除掉父目录(..)和当前目录(.)
 lDirCount = lDirCount + 1 '将目录数增1
 ReDim Preserve strFileDir(lDirCount) As String
 strFileDir(lDirCount - 1) = strFile '用动态数组保存当前目录名
 End If
 Else
 If strSearch = "" Then
 Form1.List1.AddItem strPath + strFile
 ElseIf LCase(GetExtName(strPath + strFile)) = LCase(GetExtName(strSearch)) Then
 '满足搜索条件,则处理该文件
 Form1.List1.AddItem strPath + strFile '将文件全名保存至列表框List1中
 End If
 End If
 strFile = Dir
 Wend
 For i = 0 To lDirCount - 1
 Form1.Label3.Caption = strPath + strFileDir(i)
 Call search(strPath + strFileDir(i), strSearch) '递归搜索子目录
 Next
 ReDim strFileDir(0) '将动态数组清空
 search = True '搜索成功
 Exit Function
 MyErr:
 search = False '搜索失败
 End Function
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