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Read Pixel from Screen ( using VB.NET)

Posted on 2003-12-09
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Last Modified: 2007-12-19
VB.NET Windows Application

If someone clicks on a pixel on a screen how can the pixel color be read e.g. in Mouse down event

Is it possible to access the screen as a bitmap? i.e. copy a specific area of the screen content into a bitmap.

Arvind

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Question by:arvindb1
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8 Comments
 
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Expert Comment

by:roverm
ID: 9903018
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Expert Comment

by:testn
ID: 9903442
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testn earned 500 total points
ID: 9903445
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LVL 96

Expert Comment

by:Bob Learned
ID: 9904825
Get the color of a pixel from a picture box image:

      Dim bm As Bitmap = Me.PictureBox1.Image
      bm.GetPixel(x, y)
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LVL 28

Expert Comment

by:iboutchkine
ID: 9912538
Private Sub PictureBox1_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PictureBox1.MouseMove
        'get the picture box's bitmap into the "bitmap " variable
        Dim bitmap As Bitmap = PictureBox1.Image
        'get the color at the X,Y position, using the event (e) object
        Dim color As Color = bitmap.GetPixel(e.X, e.Y)
        'get the RGB value
        Dim ColorValue As Integer = color.ToArgb

        'extract the red, and set the form's caption
        Me.Text = "Red = " & CStr((ColorValue And &HFF0000) \ &H10000) & _
        " Green = " & CStr((ColorValue And &HFF0000) \ &H100) & _
        " Blue = " & CStr((ColorValue And &HFF0000) \ &H1)
    End Sub
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Expert Comment

by:Bob Learned
ID: 9930625
Is this still an open issue?
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LVL 5

Author Comment

by:arvindb1
ID: 9933326
Yes, Currently i'm analyzing proposed solutions, pls. give me some time. i'll definitely get back.
Thanks
Arvind
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LVL 5

Author Comment

by:arvindb1
ID: 9933800
Comment from testn has solved my problem
Thanks for help
Arvind
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