remove vba project password

a link from stackoverflow, The last two steps is very important,

Or you will encounter 40230 again and again.
http://stackoverflow.com/questions/272503/how-do-i-remove-the-password-from-a-vba-project
excerpt:

Open xls file with a hex editor. (very simple use hexedit.exe from http://www.physics.ohio-state.edu/~prewett/hexedit/)

Search for DPB

Replace DPB to DPx

Save file.

Open file in Excel.

Click "Yes" if you get any message box.

Set new password from VBA Project Properties.

Close and open again file, then type your new password to unprotect.