How to use variables with Recordset! - excel

My problem is the following:
I need to assign a value to the recordset. The problem isthat I need to use a variable. So, instead of write this
MyRecordSet![field_name]
I need to write this
MyRecordSet![variable_name]
This all look simple even to me, until I find out that inside the brackets there are no quotation marks to separate strings of text from variable names. Therefore, I can't distinguish them.
Please, guys, help me! I've tried everything you can imagine.
Thanks in advance.

MyRecordSet.Fields(variablename)

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I would like to list the lines where there is a FAIL written.
As it sounds very simple in VBA it seems fairly complicated to integrate that in a cell formula.
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Bye.
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