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MaskedTextBox Constructor (String)

Initializes a new instance of the MaskedTextBox class using the specified input mask.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public MaskedTextBox(
	string mask


Type: System.String
A String representing the input mask. The initial value of the Mask property.


mask is null.

The MaskedTextBox(String) constructor uses the standard System.ComponentModel.MaskedTextProvider with the input mask to parse user input into the MaskedTextBox.

If you assign a new mask to the Mask property, it will override the value set by this constructor.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.