Event generated whenever Visual Studio initializes its Toolbox.
Namespace:  Microsoft.VisualStudio.Shell
Assembly:  Microsoft.VisualStudio.Shell.12.0 (in Microsoft.VisualStudio.Shell.12.0.dll)
Syntax
'Declaration
Protected Event ToolboxInitialized As EventHandler
protected event EventHandler ToolboxInitialized
protected:
 event EventHandler^ ToolboxInitialized {
    void add (EventHandler^ value);
    void remove (EventHandler^ value);
}
member ToolboxInitialized : IEvent<EventHandler,
    EventArgs>
JScript does not support events.
Remarks
The Visual Studio IDE generates a ToolboxInitialized event whenever one or more of the following situations occur:
- A user manually resets the Toolbox by right-clicking on one of the Toolbox categories and selection Reset Toolbox. 
- A new VSPackage providing Toolbox items is registered. 
- A VSPackage programmatically generates a ToolboxInitialized event through the Visual Studio SDK by a VSPackage calling ResetDefaults with PKGRF_TOOLBOXITEMS. - IVsUIShell uiShell = (IVsUIShell)GetService(typeof(SVsUIShell)); IVsPackage pkg = GetService(typeof(Package)) as IVsPackage; pkg.ResetDefaults((uint)__VSPKGRESETFLAGS.PKGRF_TOOLBOXITEMS);
For more information on handling a ToolboxInitialized event and providing custom Toolbox items, see Advanced Toolbox Control Development.
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.