Add two textboxes and a button to your form to which the webbrowser will navigate. On button click event, do this:
private void button1_Click(object sender, EventArgs e)
{
webBrowser1.Navigate("http://maps.googleapis.com/maps/api/staticmap?center=" + textBox1.Text + "," + textBox2.Text+"&zoom=14&size=400x400&sensor=false");
}
Eg. In textbox1 type 51, in textbox2 type 0 (i.e zero), and then press the button to navigate to that location. The example will show London map. The zoom level in the map can also be changed according to your choice.
The above example will show static maps, but I hope you got what you wanted. :)