Calling a Browse routine from a UserForm

I have the following piece of code to pick up a known file name and open it.

Sub FindFile()
'
' Macro5 Macro
'

'
    ChDir "U:\EVERYBODY!\Windmill Printed Jobs\ABBSUD"
    Workbooks.Open Filename:= _
        "U:\EVERYBODY!\Windmill Printed Jobs\ABBSUD\ABBSUD 60 X 91 TRIAL.xls"
End Sub

This was derived directly from a macro generated from browsing my network.
What I really want to do though is to enable my user to find the file using a browsing routine direct.
I have not been able to find any advice about this and am hoping that someone here can help.
John