Focus Method
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Control.Focus Method ()

 

Sets input focus to the control.

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

public bool Focus()

Return Value

Type: System.Boolean

true if the input focus request was successful; otherwise, false.

The Focus method returns true if the control successfully received input focus. The control can have the input focus while not displaying any visual cues of having the focus. This behavior is primarily observed by the nonselectable controls listed below, or any controls derived from them.

A control can be selected and receive input focus if all the following are true: the Selectable value of ControlStyles is set to true, it is contained in another control, and all its parent controls are both visible and enabled.

The Windows Forms controls in the following list are not selectable. Controls derived from these controls are also not selectable.

System_CAPS_noteNote

Focus is a low-level method intended primarily for custom control authors. Instead, application programmers should use the Select method or the ActiveControl property for child controls, or the Activate method for forms.

The following code example sets focus to the specified Control, if it can receive focus.

public void ControlSetFocus(Control control)
{
   // Set focus to the control, if it can receive focus.
   if(control.CanFocus)
   {
      control.Focus();
   }
}

UIPermission

for all windows to call this method. Associated enumeration: AllWindows value of UIPermissionWindow.

.NET Framework
Available since 1.1
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