Help with wildcard in query please.

I use Access 2010.
I have a combobox [Filter_Location] on a form [frm_Planting] and I want to use the value of the combobox in a query criteria. If the combobox is empty, I want all the values in the source. Otherwise I want only the values specified by the combobox.
I use the following criterium, but the problem is if the value of the combobox is 3, the query also give me values for 13, 23 etc.
Like "*" & [Forms]![frm_Planting]![Filter_Location]
Fritz PaulAsked:
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pls try
Like nz([Forms]![frm_Planting]![Filter_Location], "*")

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 Like Iif([Forms]![frm_Planting]![Filter_Location]="","*",[Forms]![frm_Planting]![Filter_Location])

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Fritz PaulAuthor Commented:
Thanks, but if [Forms]![frm_Planting]![Filter_Location]="", then it return no records, otherwise it works correctly.
Have you tried my 2nd solution
Fritz PaulAuthor Commented:
Thanks, I did not notice your first solution.
Like nz([Forms]![frm_Planting]![Filter_Location], "*")
This works thanks!
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