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From the front panel or block diagram window of a VI, select File»VI Properties and select Protection from the Category pull-down menu to display this page.

Use this page to set options for password-protected VIs.

This page includes the following components:

• Unlocked (no password)—Allows any user to view and edit the front panel and block diagram of the VI.
• Locked (no password)—Locks the VI so the user must unlock it from this page to edit the front panel or block diagram.
• Password-protected—Protects the VI with a password so the user cannot edit the VI or view the block diagram without the correct password.
• Change Password—Changes the password for the VI.

You also can use the Lock State:Set method to lock a VI, unlock a VI, or set the password of a VI programmatically.