Control::OnLeave Method (EventArgs^)


Raises the Leave event.

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

virtual void OnLeave(
	EventArgs^ e


Type: System::EventArgs^

An EventArgs that contains the event data.

Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.

The OnLeave method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors:

When overriding OnLeave in a derived class, be sure to call the base class's OnLeave method so that registered delegates receive the event.

The following code example uses the Leave event to reset a control to its former state.

   void textBox1_Enter( Object^ /*sender*/, System::EventArgs^ /*e*/ )
      // If the TextBox contains text, change its foreground and background colors.
      if ( textBox1->Text != String::Empty )
         textBox1->ForeColor = Color::Red;
         textBox1->BackColor = Color::Black;

         // Move the selection pointer to the end of the text of the control.

   void textBox1_Leave( Object^ /*sender*/, System::EventArgs^ /*e*/ )
      // Reset the colors and selection of the TextBox after focus is lost.
      textBox1->ForeColor = Color::Black;
      textBox1->BackColor = Color::White;

.NET Framework
Available since 1.1
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