Global variable - Get a textbox value - Userform

Well, i would like to store a textbox value (dateformat) in a global variable and then use her value to find a specific data in my DB


so i wrote it:

IN MODULE 1:

'Set a global variable

Public glbdate As Date


'Create a function
Public Function globaldate()

glbdate = Format(dt_lan, "mm/dd/yyyy")

End Function


IN A TEXTBOX FIELD(Event afterupdate field):

Call globaldate 'call function to get the date


IN A COMMAND BUTTON:

cnctnate = glbdate & manline & model 'Im trying to get the value

IDK what's going on, but it's not working. HELP PLS!
Thanks,