选取文件夹目录
2007年09月16日, 5:05 pm | 490 次阅读 
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在Excel应用程序中，可以使用GetOpenFileName方法显示一个提示文件名的对话框，但没有仅仅显示目录的对话框的方式。
这里，提供一个函数(名为GetDirectory)用来显示下面所示的对话框，返回代表所选目录的字符串。如果用户单击“取消”，则该函数返回一个空字符串。
GetDirectory函数接受一个参数，该参数是可选的，代表显示在对话中的字符串。若忽略该参数，则对话框中显示“选择文件夹”字符串。
GetDirectory函数及其调用示例代码如下：
Visual Basic:
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Option Explicit
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Public Type BROWSEINFO
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hOwner As Long
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pidlRoot As Long
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pszDisplayName As String
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lpszTitle As String
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ulFlags As Long
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lpfn As Long
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lParam As Long
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iImage As Long
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End Type
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'32-bit API声明
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Declare Function SHGetPathFromIDList Lib "shell32.dll" _
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Alias "SHGetPathFromIDListA" (ByVal pidl As Long, ByVal pszPath As String) _
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As Long
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Declare Function SHBrowseForFolder Lib "shell32.dll" _
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Alias "SHBrowseForFolderA" (lpBrowseInfo As BROWSEINFO) As Long
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Sub Test()
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Dim Msg As String
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Msg = "请选择要备份的位置."
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MsgBox GetDirectory(Msg)
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End Sub
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Function GetDirectory(Optional Msg) As String
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Dim bInfo As BROWSEINFO
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Dim path As String
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Dim r As Long, x As Long, pos As Integer
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' 根目录文件夹=桌面
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bInfo.pidlRoot = 0&
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' 对话框中的标题
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If IsMissing(Msg) Then
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bInfo.lpszTitle = "选择文件夹"
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Else
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bInfo.lpszTitle = Msg
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End If
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' 要返回的目录类型
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bInfo.ulFlags = &H1
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' 显示对话框Display the dialog
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x = SHBrowseForFolder(bInfo)
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' 解析结果
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path = Space$(512)
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r = SHGetPathFromIDList(ByVal x, ByVal path)
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If r Then
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pos = InStr(path, Chr$(0))
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GetDirectory = Left(path, pos - 1)
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Else
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GetDirectory = ""
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End If
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End Function
运行test()子过程，选择目录后单击“确定”按钮，则在Msgbox消息框中将显示该目录的路径字符串。
