[ACCEPTED]-how to draw drawings in picture box-picturebox

Put a PictureBox on your form, and set its 9 BackColor to White. Then add this code 8 to your form (you have to actually hook 7 up the Mouse events below, i.e. you can't 6 just copy and paste this code into your 5 form):

private Point? _Previous = null;
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
    _Previous = e.Location;
    pictureBox1_MouseMove(sender, e);
}
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
    if (_Previous != null)
    {
        if (pictureBox1.Image == null)
        {
            Bitmap bmp = new Bitmap(pictureBox1.Width, pictureBox1.Height);
            using (Graphics g = Graphics.FromImage(bmp))
            {
                g.Clear(Color.White);
            }
            pictureBox1.Image = bmp;
        }
        using (Graphics g = Graphics.FromImage(pictureBox1.Image))
        {
            g.DrawLine(Pens.Black, _Previous.Value, e.Location);
        }
        pictureBox1.Invalidate();
        _Previous = e.Location;
    }
}
private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
{
    _Previous = null;
}

And then draw away!

If you like, you 4 can improve the quality of the drawn image 3 somewhat by setting the Graphics object's SmoothingMode property.

Update: .Net 2 CF does't have the Pens collection, and MoustEventArgs doesn't 1 have a Location, so here is a CF-friendly version:

private Point? _Previous = null;
private Pen _Pen = new Pen(Color.Black);
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
    _Previous = new Point(e.X, e.Y);
    pictureBox1_MouseMove(sender, e);
}
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
    if (_Previous != null)
    {
        if (pictureBox1.Image == null)
        {
            Bitmap bmp = new Bitmap(pictureBox1.Width, pictureBox1.Height);
            using (Graphics g = Graphics.FromImage(bmp))
            {
                g.Clear(Color.White);
            }
            pictureBox1.Image = bmp;
        }
        using (Graphics g = Graphics.FromImage(pictureBox1.Image))
        {
            g.DrawLine(_Pen, _Previous.Value.X, _Previous.Value.Y, e.X, e.Y);
        }
        pictureBox1.Invalidate();
        _Previous = new Point(e.X, e.Y);
    }
}
private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
{
    _Previous = null;
}

Here, pictureBox1 == signature. I translated 1 to vb in this manner:

Global:

Dim _previous As Point = Nothing
Dim _pen As Pen = New Pen(Color.Black)
Dim drawing As Boolean = False


''' <summary>
''' This handles the signature drawing events (drawing)
''' </summary>
''' <param name="sender"></param>
''' <param name="e"></param>
''' <remarks></remarks>
Private Sub signature_MouseMove(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles signature.MouseMove
    If drawing = True Then
        If signature.Image Is Nothing Then
            Dim bmp As Bitmap = New Bitmap(signature.Width, signature.Height)

            Using g As Graphics = Graphics.FromImage(bmp)
                g.Clear(Color.White)
            End Using

            signature.Image = bmp
        End If

        Using g As Graphics = Graphics.FromImage(signature.Image)
            g.DrawLine(_pen, _previous.X, _previous.Y, e.X, e.Y)
        End Using
        signature.Invalidate()
        _previous = New Point(e.X, e.Y)
    End If
End Sub

''' <summary>
''' this indicates somebody is going to write a signature
''' </summary>
''' <param name="sender"></param>
''' <param name="e"></param>
''' <remarks></remarks>
Private Sub signature_MouseDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles signature.MouseDown
    _previous = New Point(e.X, e.Y)
    drawing = True
    signature_MouseMove(sender, e)

End Sub

''' <summary>
''' the signature is done.
''' </summary>
''' <param name="sender"></param>
''' <param name="e"></param>
''' <remarks></remarks>
Private Sub signature_MouseUp(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles signature.MouseUp
    _previous = Nothing
    drawing = False
End Sub

You can do it by capturing the mousemove 4 event of picture box then get graphics from 3 picture box like .

Graphics g= pictureBox.CreateGraphics(); then 2 u can draw whatever u want draw using this 1 graphics object