Gets or sets a value that indicates that the System.Windows.Forms.ToolStripTextBox control has been modified by the user since the control was created or its contents were last set.
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You can use this property to determine if the user has modified the contents of the System.Windows.Forms.ToolStripTextBox control. You can also set this property in code to indicate that changes were made to the System.Windows.Forms.ToolStripTextBox control by the application. This property can be used by validation and data-saving methods to determine if changes were made in a System.Windows.Forms.ToolStripTextBox control so the changed contents can be validated or saved.