Using an earlier version of xlsreadwrite (1.15.x) I was able to pass the word FALSE as the last parameter to the vlookup function.
ie: vlookup(B7, sheetx!$A$6:$E$18, 5, FALSE)
In version 3.00.07 the above statement returns a runtime error of "Unknown name FALSE". I was able to get around the problem by passing 0 instead of FALSE. To be consistant with Excel will you be putting the ability to pass TRUE/FALSE back in?
Mark
(Using XLSReadWriteII 3.0 with Delphi 7.)