How to convert RTF to PDF

How I can convert .rtf file to .pdf format with WPTools for Delphi ?

You need the products WPTools and wPDF:
place a TWPRichText on the form (from WPTools)
and a TWPPDFExport (from wPDF)

Set the property
WPPDFExport1.Source := WPRichText1;

and convert the file like this:
WPRichText1.LoadFromFile( filename );
WPPDFExport1.FileName :=
ChangeFileExt(WPRichtext1.LastFileName,'.PDF');
WPPDFExport1.Print;

When you use WPTools V4.21 you can use a TWPRichText which was created 'on the fly' using the constructor CreateDynamic-