runwait, %comspec% /c ipconfig /all > c:mac.txt, ,hide Loop, Read, c:mac.txt { ifinstring, A_LoopReadLine, Physical address { MAC=%A_LoopReadLine% break } } StringRight, MAC, MAC, 18 StringReplace, mac, mac,-,, All StringReplace, mac, mac,A,12, All StringReplace, mac, mac,B,13, All StringReplace, mac, mac,C,14, All StringReplace, mac, mac,D,15, All StringReplace, mac, mac,E,16, All StringReplace, mac, mac,F,17, All StringReplace, mac, mac,G,18, All StringReplace, mac, mac,H,