The following sample project shows how to use the RichEditControl for WPF to load and save password-encrypted files. You can specify a password and an encryption type on the left pane and export the result to DOCX or DOC format. When a user re-opens the file with a new password, the RichEditControl.EncryptedFilePasswordRequested and RichEditControl.EncryptedFilePasswordCheckFailed events occur. If the user cancels the operation or exceeds the number of attempts to enter the password, RichEditControl shows the exception message.
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