'パス名の最後尾にバックスラッシュをつける
Private Declare Function PathAddBackslash Lib "shlwapi.dll" Alias "PathAddBackslashA" _
(ByVal lpszPath As String) As Long
Private Sub Command1_Click()
Dim temp As String
temp = String(256, Chr(0)) 'バッファの確保
temp = Me.Text1(0).Text & temp
Call PathAddBackslash(temp)
Me.Text1(1).Text = temp
End Sub