Removes protection from the specified document. If the document isn't protected, this method generates an error.
public void Unprotect (ref object Password);
Public Sub Unprotect (Optional ByRef Password As Object)
Optional Object. The password string used to protect the document. Passwords are case-sensitive. If the document is protected with a password and the correct password isn't supplied, a dialog box prompts the user for the password.
Avoid using hard-coded passwords in your applications. If a password is required in a procedure, request the password from the user, store it in a variable, and then use the variable in your code.