clschoosedir.cls

一个较为完整的校园铃声控制系统。可以任意设置时间次数。

VERSION 1.0 CLASS
BEGIN
  MultiUse = -1  'True
  Persistable = 0  'NotPersistable
  DataBindingBehavior = 0  'vbNone
  DataSourceBehavior  = 0  'vbNone
  MTSTransactionMode  = 0  'NotAnMTSObject
END
Attribute VB_Name = "clsChooseDir"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Option Explicit
'API声明部分
Private Declare Function SHBrowseForFolder Lib "shell32.dll" Alias "SHBrowseForFolderA" (lpBrowseInfo As BROWSEINFO) As Long
Private Type BROWSEINFO
    hOwner As Long
    pidlRoot As Long
    pszDisplayName As String
    lpszTitle As String
    ulFlags As Long
    lpfn As Long
    lParam As Long
    iImage As Long
End Type

Private Declare Function SHGetPathFromIDList Lib "shell32.dll" Alias "SHGetPathFromIDListA" (ByVal pidl As Long, ByVal pszPath As String) As Long

Private Const BIF_RETURNONLYFSDIRS = 0
Private Const BIF_DONTGOBELOWDOMAIN = 1
Private Const BIF_STATUSTEXT = 2
Private Const BIF_RETURNFSANCESTORS = 3
Private Const BIF_BROWSEFORCOMPUTER = 4
Private Const BIF_BROWSEFORPRINTER = 5

'变量声明
Private mvarCaption As String
Private mvarhWnd As Long
Private mvarFlags As Integer
Private mvarFolder As Variant

'类的属性
Public Property Let Folder(ByVal vData As Variant)
    mvarFolder = vData
End Property

Public Property Set Folder(ByVal vData As Variant)
    Set mvarFolder = vData
End Property

Public Property Get Folder() As Variant
    If IsObject(mvarFolder) Then
        Set Folder = mvarFolder
    Else
        Folder = mvarFolder
    End If
End Property

Public Property Let Flags(ByVal vData As Integer)
    mvarFlags = vData
End Property

Public Property Get Flags() As Integer
    Flags = mvarFlags
End Property

Public Property Let hwnd(ByVal vData As Long)
    mvarhWnd = vData
End Property

Public Property Get hwnd() As Long
    hwnd = mvarhWnd
End Property

Public Property Let Caption(ByVal vData As String)
    mvarCaption = vData
End Property

Public Property Get Caption() As String
    Caption = mvarCaption
End Property

'类的方法
Public Sub GetFolder()
    Dim bi As BROWSEINFO
    Dim pidl As Long
    Dim ret As String
    
    ret = String$(255, Chr$(0))
    
    With bi
        .hOwner = hwnd
        .ulFlags = Flags
        If Caption <> "" Then
            .lpszTitle = Caption & Chr$(0)
        Else
            .lpszTitle = "Select a Folder..." & Chr$(0)
        End If
    End With
    
    pidl = SHBrowseForFolder(bi)
    
    If SHGetPathFromIDList(ByVal pidl, ByVal ret) Then
        Folder = Left$(ret, InStr(ret, Chr$(0)) - 1)
        If Right(Folder, 1) <> "\" Then
            Folder = Folder & "\"
        End If
    Else
        Folder = ""
    End If
End Sub