Following script enters predefined strings on hotkey presses if the scroll lock is active. This can be useful if you often paste a number of repeating strings. Included hotkey for script refresh (for example if you need to edit paste-able strings).
; refresh script hotkey
Numpad9::
GetKeyState, state, ScrollLock, T
if ( state = "D" )
Reload
Return
Numpad1::
GetKeyState, state, ScrollLock, T
if ( state = "D" )
Send, Hello
Return
Numpad2::
GetKeyState, state, ScrollLock, T
if ( state = "D" )
Send, World
Return
;...