isCOBOL Evolve : User Interface : Controls Reference : RIBBON : Properties : Bitmap-Number
Bitmap-Number
This property defines which image among the ones in the bitmap strip referenced by the Bitmap-Handle property is to be displayed in the page identified by the Tab-Index property.
When the values are enclosed between parentheses, the Tab-Index property is ignored, the 1st value refers to the 1st Tab, the 2nd value refers to the 2nd Tab and so on.
 
Example - Display a Ribbon control with bitmaps on the page titles
working-storage section.
77 screen-1-rbn-1-hdl handle of ribbon.
77 icon-png pic s9(9) comp-4.
...
procedure division.
...
  call "w$bitmap" using wbitmap-load "icon.png" giving 
       icon-png.
...
  display ribbon
          tab-to-add ( "Page-1" "Page-2")
          bitmap-number ( 1 2)
          lines 4.4375
          color 134
          id 6
          collapse 1
          bitmap-width 18
          bitmap-handle icon-png
          handle screen-1-rbn-1-hdl
          .
...