VB 2010 Splash Screen Issue

In that comment you wrote under the other answer, it looks like you are closing the main form and then opening the main form (i.e., rather than closing the splash screen). To change the duration of the splash screen, go to the Application tab and click "View Application Events". You will see the MyApplication class. In it, add the following function:

Protected Overrides Function OnInitialize(commandLineArgs As System.Collections.ObjectModel.ReadOnlyCollection(Of String)) As Boolean
	Me.MinimumSplashScreenDisplayTime = 10000
	Return MyBase.OnInitialize(commandLineArgs)
End Function

I tried this after finding that info here: http://www.sourcecodester.com/tutorials/net/how-create-a-splash-screen-vbnet.html

EDIT: The ApplicationEvents.vb file should look like this:

Namespace My

    ' The following events are available for MyApplication:
    ' 
    ' Startup: Raised when the application starts, before the startup form is created.
    ' Shutdown: Raised after all application forms are closed.  This event is not raised if the application terminates abnormally.
    ' UnhandledException: Raised if the application encounters an unhandled exception.
    ' StartupNextInstance: Raised when launching a single-instance application and the application is already active. 
    ' NetworkAvailabilityChanged: Raised when the network connection is connected or disconnected.
    Partial Friend Class MyApplication

        Protected Overrides Function OnInitialize(commandLineArgs As System.Collections.ObjectModel.ReadOnlyCollection(Of String)) As Boolean
            Me.MinimumSplashScreenDisplayTime = 10000
            Return MyBase.OnInitialize(commandLineArgs)
        End Function

    End Class

End Namespace