Excelben, hogy lehet ezt megcsinálni?

Assuming that you are not using VB method.

1) Select the cell and enter the custom number format ";;;**" (remove the quotes " ").

However, the text/password will still be visible in the formula bar. What you can do next is:

2) Go back to the cell format dialog, go to protection sheet tab, uncheck "Locked" and check "Hidden" instead. Unlock the whole sheet (if applicable) and then protect the sheet from Tools - Protection.

3) To view the entry, just unprotect the worksheet.

VB scriptet írnak meg egymésik módszert, de akkor a fenti sorban látható csak a cellában nem.

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