RE: Custom colors in Excel with POI XSSF

I found this thread from March of 2019 by Darrren S.
I would like to use this but am a bit confused. I am confused on where to
put this code. Do I put it in one of the members in the LIBHTTP library?
Or in one of the POI36 members? Or in my program that is building the
XLSX? Or create something new?

This is the code he posted.

dcl-c XSSFColor_CLASS
'org.apache.poi.xssf.usermodel.XSSFColor';
dcl-c Color_CLASS
'java.awt.Color';

DCL-PR new_XSSFColor
OBJECT(*JAVA: XSSFColor_CLASS)
EXTPROC(*JAVA : XSSFColor_CLASS
: *CONSTRUCTOR );
Color OBJECT(*JAVA : Color_CLASS);
END-PR ;

dcl-pr New_Color
object(*JAVA:Color_CLASS)
extproc(*JAVA:Color_CLASS
:*CONSTRUCTOR);
red like(jint) value;
green like(jint) value;
blue like(jint) value;
end-pr;

dcl-pr XSSF_setFillForegroundColor
extproc(*JAVA
: 'org.apache.poi.xssf.usermodel.XSSFCellStyle'
: 'setFillForegroundColor');
XSSFColor object(*JAVA: XSSFColor_CLASS);
end-pr;

dcl-s ClrObj object(*JAVA:Color_CLASS);
dcl-s XSSFColor OBJECT(*JAVA: XSSFColor_CLASS);
_________________________
Example call:
ClrObj=New_Color(200:200:200);
XSSFColor=New_XSSFColor(ClrObj);

// Create a cell style for wrapped column headings.
// These are bold and have a border line at the bottom
ColWrapped = SSWorkbook_createCellStyle(book);
ssCellStyle_setFont(ColWrapped: WhiteFont);
SSCellStyle_setWrapText(ColWrapped:*On);
SSCellStyle_setAlignment(ColWrapped: ALIGN_CENTER);
XSSF_setFillForegroundColor(ColWrapped:XSSFColor);
ssCellStyle_setFillPattern(ColWrapped: SS_PATTERN_SOLID_FOREGROUND);
callp $SetAllBorder(ColWrapped:BORDER_THIN);