AHK - Convert type case quickly

ConvertTypeCase.ahk

;CTL+L - convert to lowercase
;CTL+U - convert to uppercase
;CTL+K - invert the case (e.g. "The Big Dog" becomes "tHE bIG dOG")
;SHIFT+CTL+K - convert to capitalized (e.g. "the big dog" becomes "The Big Dog")
;SHIFT+CTL+U - convert to sentence case

^u:: ; Convert text to upper
sendinput,{CTRLDown}C{CtrlUp}
 StringUpper Clipboard, Clipboard
 Sendinput %Clipboard%
RETURN

^l:: ; Convert text to lower
sendinput,{CTRLDown}C{CtrlUp}
 StringLower Clipboard, Clipboard
 Sendinput %Clipboard%
RETURN

+^k:: ; Convert text to capitalized
sendinput,{CTRLDown}C{CtrlUp}
 StringUpper Clipboard, Clipboard, T
 Sendinput %Clipboard%
RETURN

^k:: ; Convert text to inverted
 Lab_Invert_Char_Out:= ""
 Loop % Strlen(Clipboard) {
    Lab_Invert_Char:= Substr(Clipboard, A_Index, 1)
    if Lab_Invert_Char is upper
       Lab_Invert_Char_Out:= Lab_Invert_Char_Out Chr(Asc(Lab_Invert_Char) + 32)
    else if Lab_Invert_Char is lower
       Lab_Invert_Char_Out:= Lab_Invert_Char_Out Chr(Asc(Lab_Invert_Char) - 32)
    else
       Lab_Invert_Char_Out:= Lab_Invert_Char_Out Lab_Invert_Char
 }
 Sendinput %Lab_Invert_Char_Out%
RETURN