Initializes the UI plugin.

Public Sub OnStartup( _
    ByVal PluginSite As IAgUiPluginSite _
)

public void OnStartup(
    IAgUiPluginSite PluginSite
);

public: void OnStartup(
    IAgUiPluginSite ^ PluginSite
);

public: HRESULT OnStartup(
    IAgUiPluginSite * PluginSite
);

public void onStartup(
    IAgUiPluginSite PluginSite
);

OnStartup method is called by the hosting environment when a User Interface plugin is loaded or activated. The hosting environment passes the site object to the plugin to allow the plugin communicate with the hosting environment.