hi, im trying to rotate a gdi drawn object on my form with a
keypress....forinstance when i push the down arrow, for it to rotate the
object drawn until the top is down, or if i push the right arrow key, to
rotate the object until its pointed to the right. i tried using a drawing
matrix to accomplish this, but all it did was rotate my entire form (im
drawing my object on the back of the form) and thats not what i need. I need
it to rotate on the spot, so i tried RotateAt but that also didnt work...how
can i accomplish what im looking for?

thanks

Hi,

        Maybe this will help.  I added a picturebox to a form and have it
draw an image in the paint event.  The point that the image is rotated about
is the center of the image. I added a timer so every 100 miliseconds it
redraws the image rotated 30 degrees.

Imports System.Drawing.Drawing2D

Public Class Form1

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
        Timer1.Enabled = True
    End Sub


    Private Sub PictureBox1_Paint(ByVal sender As Object, ByVal e As
System.Windows.Forms.PaintEventArgs) Handles PictureBox1.Paint
        Static bm As Bitmap
        Static intAngle As Integer = 0

        If bm Is Nothing Then
            bm = New Bitmap(16, 16)
            Dim g As Graphics = Graphics.FromImage(bm)
            g.Clear(Color.White)
            g.DrawLine(Pens.Red, 0, 0, 16, 16)
            g.DrawLine(Pens.Blue, 0, 16, 16, 0)
        End If

        e.Graphics.TranslateTransform(50, 50)
        e.Graphics.RotateTransform(intAngle)

        e.Graphics.DrawImage(bm, -8, -8)
        intAngle += 30
        If intAngle > 360 Then intAngle -= 360
    End Sub

    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Timer1.Tick
        PictureBox1.Invalidate()
    End Sub
End Class


Ken
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