Comparing Days In VBA

Using VBA, I would like to compare the date found in Cell(datRow, colIndex) of the Recap workBOOK to the date found in Cell(varRow, 3) of the Deduction workBOOK.

I loop through several Recap workbooks, one for each month. The problem I am encountering is this: If the date(s) found in the Recap workbook are before the date(one date) found in the Deduction workbook, the procedure will add the value of data below it to a running variable total.

However, what I am Needing, is for the value only to be added to the total IF the DAY of the date found in the Recap workbook (not the entire date) falls before the DAY of the date found in the Deduction workbook.

I know this is lengthy, but I have researched this for hours and am finding little to help me. Is there a function used in VBA to compare only the day of a date? And can I use a conditional IF statement such that execution happens when Cells(varRow, 3).Value > Cells(datRow, colIndex).Value even though the cells reside in different workbooks (both are open during processing)?