Provides properties, methods, and events related to the current application.
Assembly: Microsoft.VisualBasic (in Microsoft.VisualBasic.dll)
Thetype exposes the following members.
|ApplicationContext||Gets the ApplicationContext object for the current thread of a Windows Forms application.|
|CommandLineArgs||Gets a collection containing the command-line arguments as strings for the current application. (Inherited from ConsoleApplicationBase.)|
|Culture||Gets the culture that the current thread uses for string manipulation and string formatting. (Inherited from ApplicationBase.)|
|Deployment||Gets the current application's ClickOnce deployment object, which provides support for updating the current deployment programmatically and support for the on-demand download of files. (Inherited from ConsoleApplicationBase.)|
|EnableVisualStyles||Determines whether this application will use the Windows XP styles for windows, controls, and so on.|
|Info||Gets an object that provides properties for getting information about the application's assembly, such as the version number, description, and so on. (Inherited from ApplicationBase.)|
|InternalCommandLine||Sets the values to use as the current application's command-line arguments. (Inherited from ConsoleApplicationBase.)|
|IsNetworkDeployed||Gets a Boolean that represents whether the application was deployed from a network using ClickOnce. (Inherited from ConsoleApplicationBase.)|
|IsSingleInstance||Determines whether this application is a single-instance application.|
|Log||Gets an object that provides properties and methods for writing event and exception information to the application's log listeners. (Inherited from ApplicationBase.)|
|MainForm||Gets or sets the main form for this application.|
|MinimumSplashScreenDisplayTime||Determines the minimum length of time, in milliseconds, for which the splash screen is displayed.|
|OpenForms||Gets a collection of all the application's open forms.|
|SaveMySettingsOnExit||Determines whether the application saves the user settings on exit.|
|ShutdownStyle||Determines what happens when the application's main form closes.|
|SplashScreen||Gets or sets the splash screen for this application.|
|UICulture||Gets the culture that the current thread uses for retrieving culture-specific resources. (Inherited from ApplicationBase.)|
|UseCompatibleTextRendering||When overridden in a derived class, this property allows a designer to specify the default text rendering engine for the application's forms.|
|ChangeCulture||Changes the culture used by the current thread for string manipulation and for string formatting. (Inherited from ApplicationBase.)|
|ChangeUICulture||Changes the culture that the current thread uses for retrieving culture-specific resources. (Inherited from ApplicationBase.)|
|DoEvents||Processes all Windows messages currently in the message queue.|
|Equals(Object)||Determines whether the specified object is equal to the current object. (Inherited from Object.)|
|GetEnvironmentVariable||Returns the value of the specified environment variable. (Inherited from ApplicationBase.)|
|GetHashCode||Serves as the default hash function. (Inherited from Object.)|
|GetType||Gets the Type of the current instance. (Inherited from Object.)|
|HideSplashScreen||Hides the application's splash screen.|
|MemberwiseClone||Creates a shallow copy of the current Object. (Inherited from Object.)|
|OnCreateMainForm||When overridden in a derived class, allows a designer to emit code that configures the splash screen and main form.|
|OnCreateSplashScreen||When overridden in a derived class, allows a designer to emit code that initializes the splash screen.|
|OnInitialize||Sets the visual styles, text display styles, and current principal for the main application thread (if the application uses Windows authentication), and initializes the splash screen, if defined.|
|OnRun||Provides the starting point for when the main application is ready to start running, after the initialization is done.|
|OnShutdown||When overridden in a derived class, allows for code to run when the application shuts down.|
|OnStartup||When overridden in a derived class, allows for code to run when the application starts.|
|OnStartupNextInstance||When overridden in a derived class, allows for code to run when a subsequent instance of a single-instance application starts.|
|OnUnhandledException||When overridden in a derived class, allows for code to run when an unhandled exception occurs in the application.|
|Run||Sets up and starts the Visual Basic Application model.|
|ShowSplashScreen||Determines if the application has a splash screen defined, and if it does, displays it.|
|ToString||Returns a string that represents the current object. (Inherited from Object.)|
|NetworkAvailabilityChanged||Occurs when the network availability changes.|
|Shutdown||Occurs when the application shuts down.|
|Startup||Occurs when the application starts.|
|StartupNextInstance||Occurs when attempting to start a single-instance application and the application is already active.|
|UnhandledException||Occurs when the application encounters an unhandled exception.|
The properties exposed by the My.Application object return data that is associated only with the current application or DLL. No system-level information can be altered with My.Application.
The My.Application object consists of the following classes:
ApplicationBase provides members that are available in all projects.
provides members that are available in Windows Forms applications.
ConsoleApplicationBase provides members that are available in console applications.
The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: Resources. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.
This example uses a loop to iterate through the application's open forms, selects the forms that can be accessed directly by the current thread, and displays their titles in a ListBox control. For information about how to access the open forms, see OpenForms.
Private Sub GetOpenFormTitles() Dim formTitles As New Collection Try For Each f As Form In My.Application.OpenForms If Not f.InvokeRequired Then ' Can access the form directly. formTitles.Add(f.Text) End If Next Catch ex As Exception formTitles.Add("Error: " & ex.Message) End Try Form1.ListBox1.DataSource = formTitles End Sub
This example requires that your Windows Forms application have a form named Form1 that contains a list box named ListBox1.