Dialog Box To Select Folder Only

I have code below which brings up a dialogue box and allows me to sect an excel file. Is there a way to change this code so the dialogue box will ask me to select a folder instead? I want to be able to select a folder and the rest of the code will open the files in the folder.

Sub Euro()
Dim wb1 As Workbook
Dim sFileName1 As String
myMsg = "Please Select Euromcontact Value File"
Response = MsgBox(myMsg, vbExclamation + vbOKOnly, myTitle)
sFileName1 = Application. GetOpenFilename
If sFileName1 = "False" Then Exit Sub
Set wb1 = Workbooks.Open(Filename:=sFileName1)
With wb1
.Activate
End With
End Sub