a = int.Parse(textBox1.Text);
            b = int.Parse(textBox2.Text);
            c = a(int.Parse(comboBox1.Text));
            textBox3.Text = c.ToString();

I am inputing 2 values in a and b ....and through combox1 I am doing calculations

Thanks

a = int.Parse(textBox1.Text);
            b = int.Parse(textBox2.Text);
            c = a(int.Parse(comboBox1.Text));
            textBox3.Text = c.ToString();

I am inputing 2 values in a and b ....and through combox1 I am doing calculations

Thanks

So, what is the question?

Perhaps you better ask your question(if any, see Ana D.) in the C# forum, instead of in the VB.NET forum.
From the code you posted I can see that line 3 will definitly not work.
a is an integer you cannot pass the variable int.Parse(comboBox1.Text) to an integer like you do.
But then again ask the C# forum, more guys and girls over there to solve your problem about C#.

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