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MicroStation Wiki How to read the RGB values of the Attached Color Table
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    How to read the RGB values of the Attached Color Table

       
      Applies To 
       
      Product(s): MicroStation
      Version(s): 08.11.09.578
      Environment:  Windows 7 32 bit,Windows 7 64 bit
      Area:  Programming
      Subarea:  VBA
      Original Author: Tristan Anderson, Bentley Technical Support Group
       

    For many projects, it may be necessary to evaluate color tables used throughout the drawings to extract RGB values to text files.

    VBA provides the ability to directly access all of the colors. Every color value is stored as a Long so that the RGB values can be accessed individually.

    Here is an example that reads all values of the current color table. The output is a CSV file, which is stored in the same directory as the open DGN.

    ' Convert Long to RGB Values
    Private Sub ExtractRGB(ByVal longColor As Long, intRed As Byte, intGreen As Byte, intBlue As Byte)
        Dim lngColor As Long
     
        lngColor = longColor
        intRed = lngColor Mod &H100
        lngColor = lngColor \ &H100
        intGreen = lngColor Mod &H100
        lngColor = lngColor \ &H100
        intBlue = lngColor Mod &H100
    End Sub
     
    ' extract colors from attached colortable
    Sub tbl2txt()
    Dim tbl As ColorTable
    Dim col() As Long
    Dim r As Byte, g As Byte, b As Byte
    Dim bg As Long
    Set tbl = ActiveDesignFile.ExtractColorTable
    col = tbl.GetColors
    Open ActiveDesignFile.FullName + "-rgb values.csv" For Output As #1
    Print #1, "Number;Red;Green;Blue"
    For i = LBound(col) To UBound(col)
        Call ExtractRGB(col(i), r, g, b)
        Print #1, Str(i) + ";" + Str(r) + ";" + Str(g) + ";" + Str(b)
    Next
    ' and Background color:
    bg = tbl.BackColor
        Call ExtractRGB(bg, r, g, b)
        Print #1, "BG;" + Str(r) + "; " + Str(g) + "; " + Str(b); ""
     
    Close #1
    End Sub

    To create the CSV file, the subroutine must be called tbl2txt.

    An excerpt of the output in the .csv may then look something like this:

    Number Red Green Blue
    0 255 255 255
    1 255 0 0
    2 255 255 0
    3 0 255 0
    4 0 255 255
    5 0 0 255
    6 255 0 255
    7 255 255 255
    8 128 128 128
    9 192 192 192
    10 255 0 0
    • VBAWindows 7 32 bit
    • MicroStation
    • Windows 7 64 bit
    • Programming
    • en
    • 08.11.09.578
    • SELECTsupport
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    • Tristan Anderson Created by Bentley Colleague Tristan Anderson
    • When: Thu, Jul 16 2015 2:12 PM
    • Tristan Anderson Last revision by Bentley Colleague Tristan Anderson
    • When: Thu, Jul 16 2015 2:12 PM
    • Revisions: 2
    • Comments: 0
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