THotPDF.SetLoadedPageLabel Method

Defines a page label range for the loaded PDF starting from a specified page, setting the numbering style, prefix text, and starting number

Declaration

procedure SetLoadedPageLabel(StartPageIndex: Integer; const AStyle: AnsiString; const APrefix: AnsiString; AStart: Integer);

HPDFDoc

Name	Purpose
`StartPageIndex`	The zero-based page index where the new label range begins
`AStyle`	The numbering style: 1 for decimal, 2 upper-case Roman, 3 lower-case Roman, 4 upper-case letters, 5 lower-case letters, and 0 where only the prefix is wanted
`APrefix`	Optional text set ahead of each page number; bytes above 127 are read as UTF-8
`AStart`	The starting number of the range; the range's first page is numbered with this value

This member returns no value

The range goes into the catalog /PageLabels number tree in page order — trees split across /Kids nodes included — so viewers read the labels properly
Calling the method a second time with the same StartPageIndex supersedes that range
Where the document has no range beginning at the first page, a plain decimal range is added on its behalf, because the number tree has to cover page index 0 (ISO 32000-1 12.4.2)