Conversion Given an ICM Profile (Visual Basic)

1. Define the following global variables:

   Dim ClrHandle As Long 
   Dim cnvParam As CONVERSION_PARAMS 
   Dim wtPoint As WHITEPOINT 'this needs to be defined in VB, because its member in CONVERSION_PARAMS can't be accessed since it is a pointer and not a structure 
   Dim RGBColor(3) As Byte 
   Dim ColorSpace(4) As Byte 

2. Set the conversion options by filling a CONVERSION_PARAMS structure:

   wtPoint.nWhitePoint = CIELAB_D50 
   wtPoint.xWhite = 0 
   wtPoint.yWhite = 0 
   cnvParam.uStructSize = Len(cnvParam) 
   cnvParam.nQuantization = 8 
   cnvParam.nMethod = USE_CUSTOM_ICC 
   cnvParam.nActiveMethod = USE_CUSTOM_ICC 
   cnvParam.pCmykParams = 0 
   cnvParam.pLabParams = 0 
   cnvParam.pYuvParams = 0 
   cnvParam.sDstInputTable(0) = 0 
   cnvParam.pWpoint = VarPtr(wtPoint) 
   cnvParam.pMemInputProfile = 0 
   cnvParam.pMemOutputProfile = 0 
   Dim str1 As String 
   str1 = "C:\\MyRGBProfile.ICM" 
   Dim i As Integer 
   For i = 0 To Len(str1) - 1 
      cnvParam.sInputProfile(i) = Asc(Right(str1, Len(str1) - i)) 
   Next i 
   str1 = "C:\\MyRGBProfile.ICM" 
   For i = 0 To Len(str1) - 1 
      cnvParam.sOutputProfile(i) = Asc(Right(str1, Len(str1) - i)) 
   Next i 

3. Initialize the color conversion handle with L_ClrInit():

   L_ClrInit ClrHandle, CCS_CMYK, CCS_RGB, cnvParam 

4. Now, do the conversion:

   ColorSpace(0) = 100 
   ColorSpace(1) = 100 
   ColorSpace(2) = 100 
   ColorSpace(3) = 100 
   L_ClrConvert ClrHandle, ColorSpace(0), RGBColor(0), 1, 1, 0, 0 

5. At the end, free the color conversion handle:

   L_ClrFree ClrHandle 

See Also

Introduction
Bitmap Conversion Options
Color Conversion C API Function Groups
Getting Started