Selecting New Client

If I wanted to Select a new client in the middle of a script how could I do this?
Say have it press ctrl + 2 and ctrl + 1 to switch between the first and second tabs and then select the new Runescape client within each tab after every switch?

Edit- So I figured out how I can set the client area however KeyDown(A2); does not work for the control key? Says invalid Identifier?

Are you trying to press down Ctrl + 2 with this?

For ctrl, it'd be KeyDown(VK_CONTROL) I believe. For "2", well, VK_2.