OpenPyxl: How to iterate through each Column (in 1 row) to find a value?

[chatguy]

When using Python OpenPyxl, how would I iterate through each Column (in only one row) to find a value?

Here's my current (failing) attempt -- (There appears to be an error in (at least) my 2nd for loop.)

book = openpyxl.load_workbook(excelFile)
for sheet in book.worksheets: #For each worksheet
    for colidx in sheet.iter_cols(sheet.min_col,sheet.max_col): #For each Column in a worksheet
        if sheet.cell(1,colidx).value == "ValueImLookingFor": #Search each Column in only Row #1 for value
            print ("Found ValueImLookingFor in COLUMN " + colidx)

ps: Xposted elsewhere last week, but no working answers yet. I'll post the answer to both forums once found.
Thanks so much in advance,
CG