how do delete th file name in an inputstring

[AntiVirusGuy 1]

runasset($user,$domain, $password)

$launchfile= GUICtrlCreateInput("", 8, 56, 553, 21, -1, $WS_EX_CLIENTEDGE)

GUICtrlSetState(-1,$GUI_ACCEPTFILES)

Run($launchfile, $launchfile -filename)??????????

using the runasset command I have to specify the working directory to work on our domain I have tried everyway around it any ideas?

[LxP 4]

Answered here. Please don't cross-post if you don't have to!