Nur ein toter Bug ist ein guter Bug!

Option Explicit
 
Private Type OPENFILENAME
    lStructSize As Long
    hwndOwner As Long
    hInstance As Long
    lpstrFilter As String
    lpstrCustomFilter As String
    nMaxCustFilter As Long
    nFilterIndex As Long
    lpstrFile As String
    nMaxFile As Long
    lpstrFileTitle As String
    nMaxFileTitle As Long
    lpstrInitialDir As String
    lpstrTitle As String
    flags As Long
    nFileOffset As Integer
    nFileExtension As Integer
    lpstrDefExt As String
    lCustData As Long
    lpfnHook As Long
    lpTemplateName As String
End Type
 
Private Declare Function GetOpenFileName Lib "comdlg32.dll" Alias _
  "GetOpenFileNameA" (pOpenfilename As OPENFILENAME) As Long
Private Declare Function GetSaveFileName Lib "comdlg32.dll" Alias _
"GetSaveFileNameA" (pOpenfilename As OPENFILENAME) As Long
 
Dim OFName As OPENFILENAME
 
Private Sub Command1_Click()
    Dim sFile As String
    sFile = ShowOpen
    If sFile <> "" Then
        MsgBox "You chose this file: " + sFile
    Else
        MsgBox "You pressed cancel"
    End If
End Sub
 
Private Sub Command2_Click()
    Dim sFile As String
    sFile = ShowSave
    If sFile <> "" Then
        MsgBox "You chose this file: " + sFile
    Else
        MsgBox "You pressed cancel"
    End If
End Sub
 
Private Sub Form_Load()
    Command1.Caption = "ShowOpen"
    Command2.Caption = "ShowSave"
End Sub
 
Private Function ShowOpen() As String
    ' Set the structure size
    OFName.lStructSize = Len(OFName)
    ' Set the owner window
    OFName.hwndOwner = Me.hWnd
    ' Set the application's instance
    OFName.hInstance = App.hInstance
    ' Set the filet
    OFName.lpstrFilter = "Text Files (*.txt)" + Chr$(0) + "*.txt" + Chr$(0) + _
      "All Files (*.*)" + Chr$(0) + "*.*" + Chr$(0)
    ' Create a buffer
    OFName.lpstrFile = Space$(254)
    ' Set the maximum number of chars
    OFName.nMaxFile = 255
    ' Create a buffer
    OFName.lpstrFileTitle = Space$(254)
    ' Set the maximum number of chars
    OFName.nMaxFileTitle = 255
    ' Set the initial directory
    OFName.lpstrInitialDir = "D:\"
    ' Set the dialog title
    OFName.lpstrTitle = "Open File"
    ' no extra flags
    OFName.flags = 0
    ' Show the 'Open File'-dialog
    If GetOpenFileName(OFName) Then
        ShowOpen = Trim$(OFName.lpstrFile)
    Else
        ShowOpen = ""
    End If
End Function
 
Private Function ShowSave() As String
    ' Set the structure size
    OFName.lStructSize = Len(OFName)
    ' Set the owner window
    OFName.hwndOwner = Me.hWnd
    ' Set the application's instance
    OFName.hInstance = App.hInstance
    ' Set the filet
    OFName.lpstrFilter = "Text Files (*.txt)" + Chr$(0) + "*.txt" + Chr$(0) + _
      "All Files (*.*)" + Chr$(0) + "*.*" + Chr$(0)
    ' Create a buffer
    OFName.lpstrFile = Space$(254)
    ' Set the maximum number of chars
    OFName.nMaxFile = 255
    ' Create a buffer
    OFName.lpstrFileTitle = Space$(254)
    ' Set the maximum number of chars
    OFName.nMaxFileTitle = 255
    ' Set the initial directory
    OFName.lpstrInitialDir = "C:\"
    ' Set the dialog title
    OFName.lpstrTitle = "Save File"
    ' no extra flags
    OFName.flags = 0
 
    ' Filename
    OFName.lpstrFile = "Test.txt"
 
    ' Show the 'Save File'-dialog
    If GetSaveFileName(OFName) Then
        ShowSave = Trim$(OFName.lpstrFile)
    Else
        ShowSave = ""
    End If
End Function

Nur ein toter Bug ist ein guter Bug!