wxBasic

  ' from http://wxbasic.sourceforge.net/phpBB2/viewtopic.php?t=554
  ' Simple Text Viewer written in wxBasic
  dim AppName = "Text Viewer"
  fileName = ""

  ' Main window
  dim frame = new wxFrame( Nothing, -1, AppName & " - Untitled Document" )
  ' Text edit control
  dim control = new wxTextCtrl( frame, -1, "", wxPoint( 0, 0 ),
  wxSize( 100, 100 ), wxTE_MULTILINE | wxTE_READONLY | wxTE_RICH)

  ' Status bar - The one at the bottom of the window
  dim status = frame.CreateStatusBar( 1 )
  frame.SetStatusText("Ready")
  '
  ' Dialog used for Open
  dim fileDialog = new wxFileDialog( frame )
  '
  ' add menubar to the frame
  dim mBar = new wxMenuBar()
  frame.SetMenuBar(mBar)
  '
  ' build the "File" dropdown menu
  dim mFile = new wxMenu()
  mBar.Append(mFile, "&File")

  ' make it
  '
  mFile.Append( wxID_OPEN, "&Open...", "Loads an existing file from disk" )
  '
  mFile.AppendSeparator()
  mFile.Append( wxID_EXIT, "E&xit\tAlt-X", "Exit Application" )

  Sub onFileOpen( event )
     fileDialog.SetMessage("Open File")
     fileDialog.SetStyle( wxOPEN )
     If fileDialog.ShowModal() = wxID_OK Then
       fileName = fileDialog.GetPath()
       Ext = fileDialog.GetFilename()
       control.Clear()
       control.LoadFile( fileName )
       frame.SetTitle( AppName & " - " & fileName )
       frame.SetStatusText(Ext)
    End If
  End Sub
  '
  Connect( frame, wxID_OPEN, wxEVT_COMMAND_MENU_SELECTED, "onFileOpen" )

  Sub onFileExit( event )
    frame.Close(True)
  End Sub
  '
  Connect( frame, wxID_EXIT, wxEVT_COMMAND_MENU_SELECTED, "onFileExit" )

  ' build the "Help" dropdown menu
  dim mHelp = new wxMenu()
  mBar.Append(mHelp, "&Help")
  mHelp.Append( wxID_HELP, "&About\tF1", "About this program" )
  '
  Sub onHelpAbout( event )
    Dim msg = "Text View allows any text file\n" &
    "to be viewed regardless of its extension.\n" &
    "If the file being opened isn't a text file\n" &
    "then it won't be displayed. There will be a\n" &
    "little garbage shown and that's all."
    wxMessageBox( msg, "About Text View", wxOK + wxICON_INFORMATION, frame )
  End Sub
  Connect( frame, wxID_HELP, wxEVT_COMMAND_MENU_SELECTED, "onHelpAbout" )

  frame.Show(True)