Tiling one Form with a part of another Form

[VisualBeginner.NET]

I want to tile one Form with a small portion of another Form. What am I doing wrong?

Public Class Form71

    Dim backImg As New Bitmap(Form70.Picture1.Image) ' 214 by 169
    Dim tBr As New TextureBrush(backImg, wrapMode:=Drawing2D.WrapMode.TileFlipXY)

'   Then we will replace the image with another one in Form_Load

    Private Sub Form71_Load(sender As Object, e As EventArgs) Handles MyBase.Load

        Dim NewImage As New Bitmap(80, 60)
        Using g As Graphics = Graphics.FromImage(NewImage)
            g.CopyFromScreen(Form70.Location.X, Form70.Location.Y, 400, 100, NewImage.Size)
'    One of these two things should work but neither is working
            g.DrawImage(Form70.frmImage, New Rectangle(400, 100, 80, 60))
        End Using
        tBr = New TextureBrush(NewImage, wrapMode:=Drawing2D.WrapMode.TileFlipXY)
        Me.Refresh()

    Private Sub Form71_Paint(sender As Object, e As PaintEventArgs) Handles Me.Paint
        e.Graphics.FillRectangle(tBr, ClientRectangle)
    End Sub

[.paul.]

Is your Form70 the default instance or a new instance?

[VisualBeginner.NET]

Form70 is used first. Then one can come to Form71. Form70 is not disposed. Only hidden.

[Delaney]

did you hide the form before getting the part you want ? it may come from that. try without hiding form70

[Shaggy Hiker]

Whether it is used first or not wasn't the question. The question was whether it was the default instance, which is a different matter. The code you are showing is taking a clip from the default instance. If that isn't the instance you are looking at, then it might be working just fine, you just aren't seeing what you expect to see.

However, what is it that isn't working? Are you seeing nothing? Are you getting an error message (and if so, what is it)?

[VisualBeginner.NET]

It did not help. It is still not drawing anything on Form71.

[VisualBeginner.NET]

Yes. It is the default instance. (I have never used anything else.)

It is not complaining but just not drawing anything on Form71. I just get a gray background on Form71.

If I use the tBrush with Form70.Picture1 it shows that nicely. But if I change the image of the tBrush then it is not drawing anything.

[.paul.]

Is Form70 visible and TopMost when you try to capture the image?

[.paul.]

CopyFromScreen doesn't work if the form isn't visible...

[VisualBeginner.NET]

No. It is not. This might be difficult to do.

[VisualBeginner.NET]

OK. But I have also tried to put the whole form background on frmImage. And then from another Form I try to take a part of that frmImage. That too does not work. Why?

[VisualBeginner.NET]

Is Form70 visible and TopMost when you try to capture the image?

No. It is not. This might be difficult to do.

[.paul.]

Is it a picturebox with a dynamically loaded image? Form70.frmImage should work as long as you set the property at the right time...

[VisualBeginner.NET]

CopyFromScreen doesn't work if the form isn't visible...

OK. But I have also tried to put the whole form background on frmImage. And then from another Form I try to take a part of that frmImage. That too does not work. Why?

[.paul.]

How did you try to put the whole form background in your image property?

[VisualBeginner.NET]

How did you try to put the whole form background in your image property?

More details are in the original post but here is that part:

   Using g As Graphics = Graphics.FromImage(NewImage)
'            g.CopyFromScreen(Form70.Location.X, Form70.Location.Y, 400, 100, NewImage.Size)
'    One of these two things should work but neither is working
            g.DrawImage(Form70.frmImage, New Rectangle(400, 100, 80, 60))
        End Using

frmImage contains the whole image for Form70. I want to take a part of it and tile it on Form71.