how to close a form with a string

Hey guys I have got to a head scratcher well at least for me any way.开发者_高级运维 I need to find a way of opening a form with a string. I have got this ...

    Dim asm = System.Reflection.Assembly.GetExecutingAssembly
    Dim myTypes As Type() = asm.GetTypes()
    Dim frm As Form
    For Each t As Type In myTypes
        If t.IsSubclassOf(GetType(System.Windows.Forms.Form)) AndAlso Me.Label4.Text = t.Name Then
            frm = CType(Activator.CreateInstance(t), Form)
            frm.Close()                
            frm.Hide()
        End If
    Next

But it doesn't close the program or even hide it i have no clue?

Question: "I need to find a way of opening a form with a string"

Thanks in advance.

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That looks to me like you created a new form instance of that type and tried to close/hide it, but I don't see it ever being shown.

If you are trying to close an existing form, then you don't want to create a new instance using Activator.CreateInstance. Rather you need to somehow locate the existing instance of the form that is already open, and close that specific instance.

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The code you posted approximates code that would create a new instance of a form by type name, then close/hide the form.

(If you wanted to close an already-open form by name, I would do:

For Each f As Form In My.Application.OpenForms
  If f Is My.Forms.NameOfFormThatIWantToClose Then f.Close()
Exit For

)

But I thought you wanted to open a new form by name. If so, you will need to use reflection. This page seems to do exactly what you want.