Recently switched to Textmate on Mac for coding. On PC when ever I want to tab in or out a block of code I just highlight and press tab or shift+tab to move it in our out.
the hotkey is command-left bracket to move left and command-right bracket to move right (the buttons next to 'p')
heres a link to more hotkeys and such http://projects.serenity.de/textmate/tutorials/basics/