To make AHK work with Microsoft's Terminal Server client in fullscreen, AHK has to reload after the Remote Desktop window is activated.
SetTimer, waitforrdp, -250return:*:ppp::password:*:ccc::SendInput, {shift}C{shift up}SendInput, apitalizedreturnwaitforrdp:IfWinActive, ahk_class TscShellContainerClass{ WinWaitNotActive, ahk_class TscShellContainerClass,,3600}WinWaitActive, ahk_class TscShellContainerClass,,3600Reloadreturn