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Extract RGB components from a Long value

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You can extract RGB values out of a 32-bit color value by using the integer division and the MOD operators, but there is a much more effective way, based on the LSet. You can convert from a long to rgb bytes and vice versa with the following code:

Click here to copy the following block
Private Type RGBWrapper
  Red As Byte
  Green As Byte
  Blue As Byte
  Alpha As Byte
End Type

Private Type LONGWrapper
  Value As Long
End Type

Private Sub Form_Load()
  Dim Color As LONGWrapper
  Dim Colors As RGBWrapper
  Color.Value = RGB(255, 123, 55)
  LSet Colors = Color 'do the actual conversion
  MsgBox Colors.Red
  MsgBox Colors.Green
  MsgBox Colors.Blue
End Sub


Submitted By : Nayan Patel  (Member Since : 5/26/2004 12:23:06 PM)

Job Description : He is the moderator of this site and currently working as an independent consultant. He works with VB.net/ASP.net, SQL Server and other MS technologies. He is MCSD.net, MCDBA and MCSE. In his free time he likes to watch funny movies and doing oil painting.
View all (893) submissions by this author  (Birth Date : 7/14/1981 )


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