My worksheet consists of several rows - Row 3 is a list of (increasing) Month End dates from 42400 (31/01/2016) to 44926 (31/12/2022). The dates are listed as numbers, formatted as dd/mm/yyyy. The object of the exercise is to find the column which is headed 31/12/2021 (Check_Year)
    Dim Check_Year As Integer                                                                   'Line 1
    Dim ColNo As Integer                                                                        'Line 2
    
    Check_Year = 2121                                                                           'Line 3
    
    
    
    Windows("My Workbook.xlsm").Activate                                                        'Line 4 - open "My Workbook" workbook
    Sheets("My worksheet").Select                                                               'Line 5 - Select the worksheet "My worksheet"
    ActiveWindow.Panes(1).Activate                                                              'Line 6 - Activate worksheet
    ActiveCell(3, 1).Select                                                                     'Line 7 - select Cell Column A, Row 3
    Range("3:3").Select                                                                         'Line 8 - Select (the whole of) Row 3
    Selection.Find(What:="31/12/" & Check_Year, After:=ActiveCell, LookIn:=xlValues, _
    LookAt:=xlWhole, SearchOrder:=xlByColumns, SearchDirection:=xlNext, _
    MatchCase:=False, SearchFormat:=False).Activate                                             'Lines 9 to 11 - select the month end date row (Row 3) and find the 31st December for the Check_Year
    
    ColNo = (ActiveCell.Column - 1)                                                             'Line 12 - "ColNo" is the column immediately before the column "31/12/2021"
'I keep getting error "Object variable or With block variable not set" for Lines 9 to 11, I understand that I should be defining an "Object" (with "Set"), but I can't figure out what should be set and where in the programme it fits. Further more, I'm not sure I need lines 6 & 7. I would be most grateful for your help.
