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    <p>You are confusing VB.NET with VB6. They are drastically different from each other. In the future, when you look for examples, documentation, and help online, be sure to specify VB6 to ensure that you are dealing with the correct language. They are essentially two completely different languages.</p> <h2>VB6</h2> <p>In VB6, you need to initially seed the random number generator using the <code>Randomize</code> function. Then, to generate a random number, you must use the <code>Rnd</code> function, for instance:</p> <pre><code>Private Sub cmdjouer_Click(Index As Integer) Randomize() txt1.Text = Int((Rnd * 9) + 1) txt2.Text = Int((Rnd * 9) + 1) txt3.Text = Int((Rnd * 9) + 1) End Sub </code></pre> <h2>VB.NET</h2> <p><code>Math.Randomize</code> is a method in the Smart Personal Objects Technology (SPOT) namespace. I doubt that is what you are actually looking for. You probably just want to use the <code>System.Random</code> class, like this:</p> <pre><code>Private Sub cmdjouer_Click(sender As Object, e As EventArgs) Handles cmdjouer.Click Dim r As New Random() txt1.Text = r.Next(9).ToString() txt2.Text = r.Next(9).ToString() txt3.Text = r.Next(9).ToString() End Sub </code></pre> <p>As others have pointed out, you don't want to set your text box reference variable to the number (e.g. <code>txt1 = ...</code>). You need to set the <code>Text</code> property of the text box. </p> <p>Also, as was pointed out in the comments below, I called <code>Randomize</code> or created the <code>New Random</code> object inside the button's <code>Click</code> event. I did so to simplify the example, but in actuality, that would be bad practice. In either case, the seeding of the random number generator should, ideally, only happen once, typically when the application starts. By re-seeding the generator each time, it can cause the results to be less random.</p>
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    1. POHow to generate random numbers
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    1. COi get this error : Syntax error it's a problem with Dim r As New Random() . So how to import System.Random class in VB .Sorry for silly question . i wrote it like that : Dim r As New System.Random() but it didn't work . Many thanks
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    2. COWhat kind of project is it? What version of visual studio are you using? Which version of the .NET framework is the project targeting?
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    3. COVB6 ,Win32 Console application
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