I believe thats not possible
Microsoft
With Excel workbooks, the first row in a range is the header row (or field names) by default. If the first range does not contain headers, you can specify HDR=NO in the extended properties in your connection string. If you specify HDR=NO in the connection string, the Jet OLE DB provider automatically names the fields for you (F1 represents the first field, F2 represents the second field, and so on).
MS Support[
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However, you can do some fancy stuff by setting the HDR=NO, selecting all the records, and then from there, recreating the Dataset.