$psISE.CurrentPowerShellTab.AddOnsMenu.Submenus.Add("Convert to uppercase",
{$psise.currentfile.editor.insertText($psise.CurrentFile.Editor.SelectedText.toUpper())},"CTRL+ALT+U") | Out-Null
$psISE.CurrentPowerShellTab.AddOnsMenu.Submenus.Add("Convert to lowercase",
{$psise.currentfile.editor.insertText($psise.CurrentFile.Editor.SelectedText.toLower())},"CTRL+ALT+L") | Out-Null