Firs of all, i'm sorry for my bad english, but i'm brazilian! I've modified many functions of Excel.au3 to make it much more fast and created anothers functions the function list is above: Functions inside UDF: _ExcelColumnLetter($iColumn) _ExcelColumnNumber($sColumn) _ExcelFormatR1C1ToA1($iRowFrom, $iColFrom, $iRowTo = "", $iColTo = "") _ExcelFormatA1ToR1C1($sRange) _ExcelReadSheetToArrayEX($oExcel, $iStartRow = 1, $iStartColumn = 1, $iRowCnt = 0, $iColCnt = 0, $iColShift = 0) _ExcelPasteSpeci