README.md

Description

Convert any color format (hex, long, rgb) to any other color format. There may be other examples of this on PSC, but I checked them and they do not use the same algorithm. This is not the fastest way to convert colors, but it is simple and reliable.

More Info

Submitted On
By	Simon Price
Level	Beginner
User Rating	4.6 (37 globes from 8 users)
Compatibility	VB 6.0
Category	Graphics
World	Visual Basic
Archive File

Source Code

' *** COLOR CONVERSTION FUNCTIONS ***
' this is the main function, all the other converstion functions play off this 1
' accepted input hex formats: &H######, ######, #*****
' NOT: &H#***** !!! (i hope no1 would use that anyway)
Public Sub Hex2RGB(strHexColor As String, r As Byte, g As Byte, b As Byte)
Dim HexColor As String
Dim i As Byte
On Error Resume Next
  ' make sure the string is 6 characters long
  ' (it may have been given in &H###### format, we want ######)
  strHexColor = Right((strHexColor), 6)
  ' however, it may also have been given as or #***** format, so add 0's in front
  For i = 1 To (6 - Len(strHexColor))
    HexColor = HexColor & "0"
  Next
  HexColor = HexColor & strHexColor
  ' convert each set of 2 characters into bytes, using vb's cbyte function
  r = CByte("&H" & Right$(HexColor, 2))
  g = CByte("&H" & Mid$(HexColor, 3, 2))
  b = CByte("&H" & Left$(HexColor, 2))
End Sub
Public Function RGB2Hex(r As Byte, g As Byte, b As Byte) As String
On Error Resume Next
  ' convert to long using vb's rgb function, then use the long2rgb function
  RGB2Hex = Long2Hex(RGB(r, g, b))
End Function
Public Sub Long2RGB(LongColor As Long, r As Byte, g As Byte, b As Byte)
On Error Resume Next
  ' convert to hex using vb's hex function, then use the hex2rgb function
  Hex2RGB (Hex(LongColor))
End Sub
Public Function RGB2Long(r As Byte, g As Byte, b As Byte) As Long
On Error Resume Next
  ' use vb's rgb function
  RGB2Long = RGB(r, g, b)
End Function
Public Function Long2Hex(LongColor As Long) As String
On Error Resume Next
  ' use vb's hex function
  Long2Hex = Hex(LongColor)
End Function
Public Function Hex2Long(strHexColor As String) As Long
Dim r As Byte
Dim g As Byte
Dim b As Byte
On Error Resume Next
  ' use the hex2rgb function to get the red green and blue bytes
  Hex2RGB strHexColor, r, g, b
  ' convert to long using vb's rgb function
  Hex2Long = RGB(r, g, b)
End Function