' Copyright 2012 ESRI
' 
' All rights reserved under the copyright laws of the United States
' and applicable international laws, treaties, and conventions.
' 
' You may freely redistribute and use this sample code, with or
' without modification, provided you include the original copyright
' notice and use restrictions.
' 
' See the use restrictions.
' 

Imports System.Collections.Generic
Imports Microsoft.Win32

Module RecentFilesRegistryHelper
    Const RecentFileRegistryKeyPath As String = "Software\ESRI\{0}\Recent File List"

    ''' <summary>
    ''' Helper function to process recent file lists stored in the registry
    ''' </summary>
    Public Function GetRecentFiles(ByVal app As ESRI.ArcGIS.Framework.IApplication) As String()
        Dim recentFilePaths As List(Of String) = New List(Of String)

        'Read the registry to get the recent file list
    Dim openKey As String = String.Format(RecentFileRegistryKeyPath, app.Name)
        Dim recentListKey As RegistryKey = Registry.CurrentUser.OpenSubKey(openKey)
        If Not recentListKey Is Nothing Then
            Dim listNames As String() = recentListKey.GetValueNames()
            For Each name As String In listNames
                Dim fileName As String = recentListKey.GetValue(name, String.Empty).ToString()
                If Not String.IsNullOrEmpty(fileName) Then
                    recentFilePaths.Add(fileName)
                End If
            Next
        End If

        Return recentFilePaths.ToArray()
    End Function

End Module