Move image from picturebox to another picturebox in another form - vb.net

Question

im trying to move an image from a PictureBox to another PictureBox in another Form that was captured by a WebCam, but my code is not working.
Public Class Form12
Private _capture As Emgu.CV.Capture
Private _captureInProgress As Boolean
Dim form23 As Form23
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
form23.SetPictureBoxImage(captureImageBox.Image)
form23.Show()
End Sub
Private Sub captureButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles captureButton.Click
If (_capture Is Nothing) Then
Try
_capture = New Emgu.CV.Capture
Catch excpt As NullReferenceException
MessageBox.Show(excpt.Message)
End Try
End If
If (Not _capture Is Nothing) Then
If _captureInProgress Then
Me.captureButton.Text = "Start Capture"
RemoveHandler Application.Idle, New EventHandler(AddressOf Me.ProcessFrame)
Else
captureButton.Text = "Capture"
AddHandler Application.Idle, New EventHandler(AddressOf Me.ProcessFrame)
End If
_captureInProgress = Not _captureInProgress
End If
End Sub
Private Sub ProcessFrame(ByVal sender As Object, ByVal arg As EventArgs)
Dim frame As Emgu.CV.Image(Of Emgu.CV.Structure.Bgr, Byte) = Me._capture.QueryFrame
Dim grayFrame As Emgu.CV.Image(Of Emgu.CV.Structure.Gray, Byte) = frame.Convert(Of Emgu.CV.Structure.Gray, Byte)()
Dim smoothedGrayFrame As Emgu.CV.Image(Of Emgu.CV.Structure.Gray, Byte) = grayFrame.PyrDown.PyrUp
captureImageBox.Image = frame.Bitmap
End Sub
Private Sub ReleaseData()
If (Not _capture Is Nothing) Then
_capture.Dispose()
End If
End Sub
2nd Form
Public Class Form23
Public Sub SetPictureBoxImage(ByVal image As Bitmap)
PictureBox1.Image = image
End Sub
End Class
all the webcam thing is working, just the transfer of image is not. sorry just a newbie here. just got this codes from a tutorial.Thanks!

Answer 1

Forms are classes - it says so at the top of all of them:
Public Class Form817
So, an instance of them should be created and thats is what your code should use everywhere:
Dim myFrm As Form817 ' DECLARES the variable
myFrm = New Form817 ' Initialize myFrm as an instance of Form817
' short method:
Dim myFrm As New Form817
The problem is here:
form23.SetPictureBoxImage(captureImageBox.Image)
form23.Show()
VB is not case sensitive AND your code did not create and instance, so the first line is referencing the class, not the instance. When you normally do something like Form23.Show - without creating an instance, VB creates one for you with the same name. This is called the default form instance and should be avoided (always).
Your image transfer fails because the code references one thing (Form23), but another is shown (a new instance of Form23).