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ComboBox.Select Method (Int32, Int32)

Selects a range of text in the editable portion of the ComboBox.

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

public void Select(
	int start,
	int length


Type: System.Int32

The position of the first character in the current text selection within the text box.

Type: System.Int32

The number of characters to select.


The start is less than zero.


start plus length is less than zero.

If you want to set the start position to the first character in the control's text, set the start parameter to zero. You can use this method to select a substring of text, such as when searching through the text of the control and replacing information.


SelectionStart returns the lower value of the current selection. For example, Select(10, -4) selects the text from character position 6 through character position 10. If you now get the SelectionStart value, it will be 6 rather than 10.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5