Gets or sets the starting point of text selected in the text box.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
If no text is selected in the control, this property indicates the insertion point, or caret, for new text. If you set this property to a location beyond the length of the text in the control, the selection start position will be placed after the last character. When text is selected in the text box control, changing this property might decrease the value of the SelectionLength property. If the remaining text in the control after the position indicated by the property is less than the value of the SelectionLength property, the value of the SelectionLength property is automatically decreased. The value of the property never causes an increase in the SelectionLength property.
You can programmatically move the selection within the text box by setting the and the SelectionLength properties.
You can programmatically move the caret within the text box by setting the to the position within the text box where you want the caret to move to and set the SelectionLength property to a value of zero (0).
The following code example uses TextBox, a derived class. It provides Click event handlers for MenuItem objects that perform Cut, Copy, Paste, and Undo operations. This example requires that a TextBox control named textBox1 has been created.
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.