Get path to Mapped drive.ahk

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#SingleInstance, Force
;https://www.autohotkey.com/boards/viewtopic.php?t=501 by just me
#Include C:\Users\Joe\Dropbox\Progs\AutoHotkey_L\Lib\_No Longer used\UNC_Network_Drives.ahk 
loop, 26 {
Alpha:=Col_To_Char(A_Index)
Drive:=Alpha ":\"
IfExist, %Drive%
      Open_Drives.=Alpha ":|"
}
StringTrimRight, Open_Drives, Open_Drives, 1 ; remove last pipe
Gui, Add, Text, x5 y0 w250 , What Drive do you want to see mapping for?
Gui, Add, DropDownList, x5 y20 vDrive, %Open_drives%
Gui, Add, Button, Default, OK
Gui, Add, Button, ,Cancel
gui show, , Select drive
Return

ButtonSelect:
FileSelectFolder, Fold
GuiControl,, Folder, %Fold%
return

ButtonCancel:
Gui, Destroy
Gosub Exitter
Return

ButtonOK:
Gui, Submit
Gui, Destroy
Clipboard:=DriveMap.Get(Drive)
MsgBox, % "The clipboard now holds the path to " Drive " which is:  " DriveMap.Get(Drive)
gosub Exitter
return

Exitter:
ExitApp
Return

Col_To_Char(Index){ ;Converting letters to number
	return Index<=26?(Chr(64+index)):Index>26?Chr((index-1)/26+64) . Chr(mod((index - 1),26)+65):""
}