Hi again,

I have been trying to figure out the following:

When a workbook opens, worksheet is locked to all input except C1.
If C1 is not blank. (i.e. someone makes an input to C1), the rest of worksheet is unlocked.
This function toggles so that if C1 entry is blanked, the worksheet locks again.

There seems to be some specific order in the protection of the sheet, background VBA code entry, and... something that I am misisng.

Thanks.