NotifyIcon.Visible Property

Gets or sets a value indicating whether the icon is visible in the status notification area of the taskbar.

[Visual Basic]
Public Property Visible As Boolean
[C#]
public bool Visible {get; set;}
[C++]
public: __property bool get_Visible();
public: __property void set_Visible(bool);
[JScript]
public function get Visible() : Boolean;
public function set Visible(Boolean);

Property Value

true if the icon is visible in the status area; otherwise, false. The default value is false.

Remarks

Since the default value is false, in order for the icon to show up in the status area, you must set the Visible property to true.

Example

[Visual Basic, C#, C++] The following 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 a Exit item on it is assigned to the NotifyIcon.ContextMenu property that allows the user to close the application. When the NotifyIcon. DoubleClick event occurs, the application form is activated by calling the Form.Activate method.

[Visual Basic] 
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.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        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

[C#] 
using System;
using System.Drawing;
using System.Windows.Forms;

public class Form1 : 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;

    [STAThread]
    static void Main() 
    {
        Application.Run(new Form1());
    }

    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.MenuItems.AddRange(
                    new System.Windows.Forms.MenuItem[] {this.menuItem1});

        // Initialize menuItem1
        this.menuItem1.Index = 0;
        this.menuItem1.Text = "E&xit";
        this.menuItem1.Click += new System.EventHandler(this.menuItem1_Click);

        // Set up how the form should be displayed.
        this.ClientSize = new System.Drawing.Size(292, 266);
        this.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.Icon = new Icon("appicon.ico");

        // The ContextMenu property sets the menu that will
        // appear when the systray icon is right clicked.
        notifyIcon1.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.Text = "Form1 (NotifyIcon example)";
        notifyIcon1.Visible = true;

        // Handle the DoubleClick event to activate the form.
        notifyIcon1.DoubleClick += new System.EventHandler(this.notifyIcon1_DoubleClick);

    }

    protected override void Dispose( bool disposing )
    {
        // Clean up any components being used.
        if( disposing )
            if (components != null)
                components.Dispose();            

        base.Dispose( disposing );
    }

    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.WindowState == FormWindowState.Minimized)
            this.WindowState = FormWindowState.Normal;

        // Activate the form.
        this.Activate();
    }

    private void menuItem1_Click(object Sender, EventArgs e) {
        // Close the form, which closes the application.
        this.Close();
    }
}

[C++] 
#using <mscorlib.dll>
#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::Windows::Forms;

public __gc class Form1 : public System::Windows::Forms::Form {
private:
   System::Windows::Forms::NotifyIcon*  notifyIcon1;
   System::Windows::Forms::ContextMenu*  contextMenu1;
   System::Windows::Forms::MenuItem*  menuItem1;
   System::ComponentModel::IContainer*  components;

public:
   Form1() {
      this->components = new System::ComponentModel::Container();
      this->contextMenu1 = new System::Windows::Forms::ContextMenu();
      this->menuItem1 = new System::Windows::Forms::MenuItem();

      // Initialize contextMenu1

      System::Windows::Forms::MenuItem* temp0 [] = {this->menuItem1};

      this->contextMenu1->MenuItems->AddRange(temp0);

      // Initialize menuItem1
      this->menuItem1->Index = 0;
      this->menuItem1->Text = S"E&xit";
      this->menuItem1->Click += new System::EventHandler(this, &Form1::menuItem1_Click);

      // Set up how the form should be displayed.
      this->ClientSize =  System::Drawing::Size(292, 266);
      this->Text = S"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->Icon = new System::Drawing::Icon(S"appicon.ico");

      // The ContextMenu property sets the menu that will
      // appear when the systray icon is right clicked.
      notifyIcon1->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->Text = S"Form1 (NotifyIcon example)";
      notifyIcon1->Visible = true;

      // Handle the DoubleClick event to activate the form.
      notifyIcon1->DoubleClick += new System::EventHandler(this, &Form1::notifyIcon1_DoubleClick);

   }

protected:
   void Dispose(bool disposing) {
      // Clean up any components being used.
      if (disposing)
         if (components != 0)
            components->Dispose();

      Form::Dispose(disposing);
   }

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->WindowState == FormWindowState::Minimized)
         this->WindowState = FormWindowState::Normal;

      // Activate the form.
      this->Activate();
   }

   void menuItem1_Click(Object* /*Sender*/, EventArgs* /*e*/) {
      // Close the form, which closes the application.
      this->Close();
   }
};

[STAThread]
int main() {
   Application::Run(new Form1());
}

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button in the upper-left corner of the page.

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also

NotifyIcon Class | NotifyIcon Members | System.Windows.Forms Namespace