UpDownBase.Select Method (Int32, Int32)
Selects a range of text in the spin box (also known as an up-down control) specifying the starting position and number of characters to select.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The following code example uses the derived class NumericUpDown. This code requires that a NumericUpDown control and a Button have been created on a form and the System.Drawing namespace has been added as a reference. On the Click event for the button, the point size of text in the NumericUpDown control increases. This prompts the control to adjust its PreferredHeight property so that all the text is visible in the control. After the user enters a new value and leaves the NumericUpDown control, the text is converted to a numeric value from a string value and validated to be between the Minimum and Maximum values. If the value is not valid, a MessageBox is displayed with the error, and the method will select the text so the user can enter a new value.
Available since 1.1