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Tip of the Day
Language: VB
Expertise: Intermediate
Nov 8, 2004

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Read Time Zone Names Stored in the Registry

The following code reads the time zone names stored in the registry and places those names in a combobox. The time zone names (there are about 50 or so) look like: "Greenwich Standard Time, Newfoundland Standard Time, Tasmania Standard Time," etc.

Option Explicit
Dim TimeZoneCol As Collection
Const ValueName As String = "Display"
Const MasterKey As String = "SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones"

Private Sub Form_Load()
    Dim KeyCol As Collection
    'be sure key exists
    If MRegistry.CheckRegistryKey(HKEY_LOCAL_MACHINE, MasterKey) Then
        'retrieve all subkeys
        Set KeyCol = MRegistry.EnumRegistryKeys(MRegistry.HKEY_LOCAL_MACHINE, MasterKey)
        Dim TheKey As Variant
        Set TimeZoneCol = New Collection
        'for each subkey, get the "Name" value
        For Each TheKey In KeyCol
             CboTimeZone.AddItem MRegistry.GetRegistryValue(MRegistry.HKEY_LOCAL_MACHINE, addSlash(MasterKey) & TheKey, ValueName, "")
        Next
    End If
End Sub



Private Function addSlash(ByVal sPath As String) As String
    sPath = Trim(sPath)
    If Len(sPath) > 0 Then
        If Right$(sPath, 1) <> "/" Then
            If Right$(sPath, 1) <> "\" Then
                sPath = sPath & "\"
            End If
        End If
        addSlash = sPath
    End If
End Function
NOTE: The class MRegistr handles the registry reading issues. The combobox CboTimeZone fills MRegistr with the time zones.
Dinesh Asanka
 
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