Loop, sources\*
{
 allstatements = FileInstall,%A_LoopFileFullPath%
 allstatements := allstatements ",%FolderVar%"
 StringTrimLeft, append, A_LoopFileFullPath,8
 allstatements = %allstatements%\Ex0rmulti\%append%`n
 allstatements = %allstatements%`nGuiControl,, MyProgress, +1.19`n
;FileInstall,sources\x1.png,%FolderVar%\Ex0rmulti\x1.png
;GuiControl,, MyProgress, +1.19
msgbox,hey
}

MsgBox,%allstatements%