NotifyIcon Class
Assembly: System.Windows.Forms (in system.windows.forms.dll)
Icons in the notification area are shortcuts to processes that are running in the background of a computer, such as a virus protection program or a volume control. These processes do not come with their own user interfaces. The NotifyIcon class provides a way to program in this functionality. The Icon property defines the icon that appears in the notification area. Pop-up menus for an icon are addressed with the ContextMenu property. The Text property assigns ToolTip text. In order for the icon to show up in the notification area, the Visible property must be set to true.
The following code example demonstrates using the NotifyIcon class to display an icon for an application in the notification area. The example demonstrates setting the Icon, ContextMenu, Text, and Visible properties and handling the DoubleClick event. A ContextMenu with an Exit item on it is assigned to the NotifyIcon.ContextMenu property, which allows the user to close the application. When the DoubleClick event occurs, the application form is activated by calling the Form.Activate method.
Imports System Imports System.Drawing Imports System.Windows.Forms Public NotInheritable Class Form1 Inherits System.Windows.Forms.Form Private contextMenu1 As System.Windows.Forms.ContextMenu Friend WithEvents menuItem1 As System.Windows.Forms.MenuItem Friend WithEvents notifyIcon1 As System.Windows.Forms.NotifyIcon Private components As System.ComponentModel.IContainer <System.STAThread()> _ Public Shared Sub Main() System.Windows.Forms.Application.Run(New Form1) End Sub 'Main Public Sub New() Me.components = New System.ComponentModel.Container Me.contextMenu1 = New System.Windows.Forms.ContextMenu Me.menuItem1 = New System.Windows.Forms.MenuItem ' Initialize contextMenu1 Me.contextMenu1.MenuItems.AddRange(New System.Windows.Forms.MenuItem() _ {Me.menuItem1}) ' Initialize menuItem1 Me.menuItem1.Index = 0 Me.menuItem1.Text = "E&xit" ' Set up how the form should be displayed. Me.ClientSize = New System.Drawing.Size(292, 266) Me.Text = "Notify Icon Example" ' Create the NotifyIcon. Me.notifyIcon1 = New System.Windows.Forms.NotifyIcon(Me.components) ' The Icon property sets the icon that will appear ' in the systray for this application. notifyIcon1.Icon = New Icon("appicon.ico") ' The ContextMenu property sets the menu that will ' appear when the systray icon is right clicked. notifyIcon1.ContextMenu = Me.contextMenu1 ' The Text property sets the text that will be displayed, ' in a tooltip, when the mouse hovers over the systray icon. notifyIcon1.Text = "Form1 (NotifyIcon example)" notifyIcon1.Visible = True End Sub 'New Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) ' Clean up any components being used. If disposing Then If Not (components Is Nothing) Then components.Dispose() End If End If MyBase.Dispose(disposing) End Sub 'Dispose Private Sub notifyIcon1_DoubleClick(Sender as object, e as EventArgs) handles notifyIcon1.DoubleClick ' Show the form when the user double clicks on the notify icon. ' Set the WindowState to normal if the form is minimized. if (me.WindowState = FormWindowState.Minimized) then _ me.WindowState = FormWindowState.Normal ' Activate the form. me.Activate() end sub Private Sub menuItem1_Click(Sender as object, e as EventArgs) handles menuItem1.Click ' Close the form, which closes the application. me.Close() end sub End Class 'Form1
import System.*;
import System.Drawing.*;
import System.Windows.Forms.*;
public class Form1 extends System.Windows.Forms.Form
{
private System.Windows.Forms.NotifyIcon notifyIcon1;
private System.Windows.Forms.ContextMenu contextMenu1;
private System.Windows.Forms.MenuItem menuItem1;
private System.ComponentModel.IContainer components;
/** @attribute STAThread()
*/
public static void main(String[] args)
{
Application.Run(new Form1());
} //main
public Form1()
{
this.components = new System.ComponentModel.Container();
this.contextMenu1 = new System.Windows.Forms.ContextMenu();
this.menuItem1 = new System.Windows.Forms.MenuItem();
// Initialize contextMenu1
this.contextMenu1.get_MenuItems().AddRange(
new System.Windows.Forms.MenuItem[] { this.menuItem1 });
// Initialize menuItem1
this.menuItem1.set_Index(0);
this.menuItem1.set_Text("E&xit");
this.menuItem1.add_Click(new System.EventHandler(this.menuItem1_Click));
// Set up how the form should be displayed.
this.set_ClientSize(new System.Drawing.Size(292, 266));
this.set_Text("Notify Icon Example");
// Create the NotifyIcon.
this.notifyIcon1 = new System.Windows.Forms.NotifyIcon(this.components);
// The Icon property sets the icon that will appear
// in the systray for this application.
notifyIcon1.set_Icon(new Icon("appicon.ico"));
// The ContextMenu property sets the menu that will
// appear when the systray icon is right clicked.
notifyIcon1.set_ContextMenu(this.contextMenu1);
// The Text property sets the text that will be displayed,
// in a tooltip, when the mouse hovers over the systray icon.
notifyIcon1.set_Text("Form1 (NotifyIcon example)");
notifyIcon1.set_Visible(true);
// Handle the DoubleClick event to activate the form.
notifyIcon1.add_DoubleClick(
new System.EventHandler(this.notifyIcon1_DoubleClick));
} //Form1
protected void Dispose(boolean disposing)
{
// Clean up any components being used.
if (disposing) {
if (components != null) {
components.Dispose();
}
}
super.Dispose(disposing);
} //Dispose
private void notifyIcon1_DoubleClick(Object Sender, EventArgs e)
{
// Show the form when the user double clicks on the notify icon.
// Set the WindowState to normal if the form is minimized.
if (this.get_WindowState().Equals(FormWindowState.Minimized)) {
this.set_WindowState(FormWindowState.Normal);
}
// Activate the form.
this.Activate();
} //notifyIcon1_DoubleClick
private void menuItem1_Click(Object Sender, EventArgs e)
{
// Close the form, which closes the application.
this.Close();
} //menuItem1_Click
} //Form1
- UIPermission to create the NotifyIcon component. Associated enumeration: UIPermissionWindow.AllWindows
System.MarshalByRefObject
System.ComponentModel.Component
System.Windows.Forms.NotifyIcon
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.