x-y axis

[cassanova]

I have to draw a x- and y-axis in a picturebox, and I have no idea how to get started

[cameron2]

Sorry your going to have to clarify the question are you drawing a graph?

[Atheist]

Take a look at the Paint event.
You'll see that the Paint eventhandler provides this parameter:

e As System.Windows.Forms.PaintEventArgs

Take a look at the different members of this 'e' object. You'll find that its very straight forward to draw anything on the PictureBox.

[cassanova]

yes
like this: y = ax² + bx + c

[toecutter]

Put a picturebox on a form and a textbox

make the form and the picture box color black

    Private Sub TextBox1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown
        If e.KeyCode = Keys.Right Then
            Dim g As Graphics = Me.PictureBox1.CreateGraphics
            Dim p As Pen = New Pen(Color.White, 1)
            Dim sStart As Point = New Point(0, 0)
            Dim eEnd As Point = New Point(CInt(Me.TextBox1.Text), 0)
            g.DrawLine(p, sStart, eEnd)
        End If
    End Sub

then hit the right arrow key

forgot that bit

[Atheist]

Dont create the graphics object like that. Use the Paint event.

[cameron2]

You could just make a graph using excel and import it into your project as a picture.

[toecutter]

Dont create the graphics object like that. Use the Paint event.

Will it still work using the TextBox1_KeyDown event?

[Atheist]

Will it still work using the TextBox1_KeyDown event?

Yes. You'd call the PictureBox' Refresh or Invalidate+Update methods in the KeyDown eventhandler.