#Persistent
#SingleInstance, Force
#NoEnv

SetBatchLines, -1
SetWorkingDir, %A_ScriptDir%
SendMode, Input

; Select the text and press Alt+v to convert space -> underscore
;#d::
!v::
Clipboard = 
Send, ^c
ClipWait, 2
If ErrorLevel
{
    TrayTip,, The attempt to copy text onto the clipboard failed.
    Return
}
StringReplace, Clipboard, Clipboard, %A_SPACE%, _, UseErrorLevel   
If ErrorLevel   ; searchtext found
{
  TrayTip,%ErrorLevel%,%Clipboard%,,1 ;num. of changes and new clipboard content
}
Else                                  ;searchtext not found
  TrayTip,,%ErrorLevel%,,1            ;return errorlevel
Return