'Check if the specified OLEDB Provider is installed and registered correctly''Example: check the Jet 4.0 OLEDB Provider'MsgBox "The specified OLEDB provider " & '        IIf(CheckOLEDBProvider' ("Microsoft.Jet.OLEDB.4.0"), "does", "does not") & " exist"'' NOTES: Requires CheckRegistryKey and GetRegistryValueFunction CheckOLEDBProvider(ByVal ProgID As String) As Boolean    Dim CLSID As String    Dim InprocServer As String        Const HKEY_CLASSES_ROOT = &H80000000        On Error Resume Next        'if the ProgID for the OLEDB does not exist, return false    If Not CheckRegistryKey(HKEY_CLASSES_ROOT, ProgID) Then Exit Function    'get the clsid    CLSID = GetRegistryValue(HKEY_CLASSES_ROOT, ProgID & "CLSID", "")    'check if there is the key "OLE DB Provider" under the CLSID key    If Not CheckRegistryKey(HKEY_CLASSES_ROOT, _        "CLSID" & CLSID & "OLE DB Provider") Then Exit Function    'check if the physical file exists    InprocServer = GetRegistryValue(HKEY_CLASSES_ROOT, _        "CLSID" & CLSID & "InprocServer32", "")        If (GetAttr(InprocServer) And vbDirectory) = 0 Then        'if the routine arrives here, return True        CheckOLEDBProvider = True    End IfEnd Function