xna blackscreen and forms

Hello,

I have 2 questions.

1) I'm using micrsoft visual studio 2010 express for windows phone. Is it right I can't add 2 forms to my game? I have a frmMain and I want to add a frmMainMenu. But I can't call for frmMainMenu in my frmMain with:

Code:

---

frmMainMenu.show

---

2) On my frmMain I want to use 2 spritenbatche's. But by one of the pictureboxes where one of the spritebatches is set to, will just color black instead of the normal image I want to give the picturebox. I've used the same subs but just with a '2' after the GDevice/Ourcontent/Sbatch. Is this normal?

Code:

---

    Public GDevice As GraphicsDevice
    Public OurContent As clsContent.GameContent
    Public SBatch As SpriteBatch
    Public GDevice2 As GraphicsDevice
    Public OurContent2 As clsContent2.GameContent
    Public SBatch2 As SpriteBatch

---

Code:

---

    Public Function InitalizeGraphics(ByRef Surface As PictureBox) As Boolean

        Dim retValue As Boolean

        Try

            Dim PParam As New PresentationParameters
            PParam.PresentationInterval = PresentInterval.Immediate
            PParam.DeviceWindowHandle = Surface.Handle
            PParam.IsFullScreen = False

            Dim GAdapter As GraphicsAdapter = GraphicsAdapter.Adapters.Item(0)
            GDevice = New GraphicsDevice(GAdapter, GraphicsProfile.HiDef, PParam)

            OurContent = New clsContent.GameContent(GDevice)
            OurContent.Content.RootDirectory = "Content"

            SBatch = New SpriteBatch(GDevice)

            LoadGraphics()

            retValue = True


        Catch ex As Exception

            retValue = False

        End Try

        Return retValue

    End Function

---

and this code again with a 2 behind the Sbatch, OurContent, GDevice etc.


Thanks in advanced