Executing Autoit code from Excel VBA

I am restating a topic that was not solved from here (I am not sure what are the rules of restarting a already discussed topic)

 I am using the following code in VBA to run Autoitcode.au3 file.

Sub RunFileName()
Dim runscript
Dim FileName As String
FileName = ThisWorkbook.Path & "\Autoitcode.au3"

MsgBox (FileName)

runscript = Shell("C:\Program Files (x86)\AutoIt3\AutoIt3_x64.exe " & FileName)

End Sub