Gets or sets the glyph indices that represent the Glyphs object.
The format for glyph indices is complex and is not documented completely here. The following is an approximate grammar of one index point:
Each such index point is then separated in the string by a semicolon (;).
Index of a glyph in the font.
Placement for next glyph relative to origin of this glyph.
Offset relative to glyph origin to move this glyph. Usually used to attach marks to base characters.
In Silverlight, the most relevant purpose for the Indices property is for spacing the characters within the specified Unicode string, instead of fully specifying each glyph. In this case, you would always use the Unicode string for the true indices and leave GlyphIndex blank in each index point. For example, to apply an advance spacing of 80 for each character in the Unicode string "Hello", the Indices value would be ",80;,80;,80;,80;,80;".
For more information, see Introduction to the GlyphRun Object and Glyphs Element. This topic discusses glyphs within the Windows Presentation Foundation (WPF) framework, but the description of the indices format is applicable to glyphs in Silverlight as well.