I don't know on Windows Mobile if it works but in Windows Forms I do so:

System.Threading.Thread.CurrentThread.CurrentUICulture = New Globalization.CultureInfo(LangCode)

where LangCode is the language code you want to change in your application. (for example it-IT for Italian or en-US for english USA) Hope this helps :)

Henrik Sozzi Poliware S.r.l.

I'm doing so in Windows CE and it's working nice:

Private Const HWND_BROADCAST As Integer = &HFFFF
Private Const WM_SETTINGCHANGE As Integer = 26
Private Const SPI_SETDESKWALLPAPER As UInt32 = 20

Public Sub SetWallpaper(ByVal ImageFileName As String)
Microsoft.Win32.Registry.SetValue("HKEY_CURRENT_USER\ControlPanel\Desktop", "Wallpaper", ImageFileName)
PostMessage(New IntPtr(HWND_BROADCAST), WM_SETTINGCHANGE, SPI_SETDESKWALLPAPER, 0)
End Sub

Hope this helps :)

Henrik Sozzi Poliware S.r.l.