Gets or sets a value indicating whether the operating system-supplied password character should be used.
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The MaskedTextBox.UseSystemPasswordChar property determines whether user-supplied input should be displayed in the System.Windows.Forms.MaskedTextBox as multiple occurrences of a password character defined by the operating system. MaskedTextBox.UseSystemPasswordChar functions similarly to the MaskedTextBox.PasswordChar property, but instead of using a programmer-supplied character for the prompt, MaskedTextBox.UseSystemPasswordChar uses a prompt defined by the operating system. This property has precedence over MaskedTextBox.PasswordChar.
As a security consideration, the System.Windows.Forms.MaskedTextBox control disables cut and copy operations on password-protected strings.