AutoHotkey Community

text = 1`n2`n3`n4`n5`n6`n7`n8`n9`n10

Gui Add, Button,,Go
Gui Add, Edit, w100 vLine, enter line #...
Gui Add, Edit, w100 r3 vEdit, %text%
Gui Show,, test
WinGet ID, ID, test
return

ControlGet, OutputVar, Line, 1, Edit1, Some Window Title

text = 1`n2`n3`n4`n5`n6`n7`n8`n9`n10

Gui Add, Button,,Go
Gui Add, Edit, w100 vLine, enter line #...
Gui Add, Edit, w100 r3 vEdit, %text%
Gui Show,, test
WinGet winID, ID, test
return

ButtonGo:
   Gui, Submit, NoHide
   scrollTo(winID, "Edit2", Line)
Return

scrollTo(winID, editCNN, lineSel)   ;window ID, Control class name+number, line to scroll to
{   
   SendMessage, 0xCE, 0, 0, %editCNN%, ahk_id %winID% ; EM_GETFIRSTVISIBLELINE to get first line shown (results stored in ErrorLevel)
   lineSet := lineSel - ErrorLevel -1   ;get difference between current line and zeroth line, subtract one
   PostMessage, 0xB6, 0, %lineSet%, %editCNN%, ahk_id %winID% ; EM_LINESCROLL to scroll target to top
   GuiControl, Focus, %editCNN%   ;set focus to the edit ctrl
   lineSel--   ;EM_LINEINDEX is 0-based, so sub one
   SendMessage, 0xBB, %lineSel%, 0, %editCNN%, ahk_id %winID% ; EM_LINEINDEX to get first char from line (results stored in ErrorLevel)
   PostMessage, 0xB1, %ErrorLevel%, %ErrorLevel%, %editCNN%, ahk_id %winID% ; EM_SETSEL to change caret to first character position of line 'lineSel'
}

controlsend, Edit2, {home}{Down 3} ,test