Represents a Windows text box control.


The TextBox control allows the user to enter text in an application. This control has additional functionality that is not found in the standard Windows text box control, including multiline editing and password character masking.

Typically, a TextBox control is used to display, or accept as input, a single line of text. You can use the Multiline and ScrollBars properties to enable multiple lines of text to be displayed or entered. Set the AcceptsTab and AcceptsReturn properties to true to allow greater text manipulation in a multiline TextBox control. You can limit the amount of text entered into a TextBox control by setting the MaxLength property to a specific number of characters. TextBox controls can also be used to accept passwords and other sensitive information. You can use the PasswordChar property to mask characters entered in a single-line version of the control.

To restrict text from being entered in a TextBox control, you can create an event handler for the KeyDown event in order to validate each character entered in the control. You can also restrict all entry of data in a TextBox control by setting the ReadOnly property to true.

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