You can pass -1 for parameters you don't need to specify.

? ASCAN(laField,'REVWORD',-1,-1,-1,6)

>VFP 7 introduces a new parameter to search an array for exact match. This parameter is the 4th optional one. When I first tried that, I used:
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>? ASCAN(laField,'REVWORD',,,,6)
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>But, if we use the 4th optional parameter, we have to pass a value to the first 3. Otherwise, an error is returned. So, the following is needed:
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>? ASCAN(laField,'REVWORD',1,1,1,6)
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>I was just wondering if I did it right or if there is a way to do it based on my first example.