This is an example (from the help file) using TImageEnView:
ImageEnView1.IO.CreatePDFFile( 'output.pdf' );
// load and save page 1
ImageEnView1.IO.LoadFromFile('page1.tiff');
ImageEnView1.IO.Params.PDF_Compression:= ioPDF_G4FAX; // G4Fax compression
ImageEnView1.IO.SaveToPDF;
// load and save page 2
ImageEnView1.IO.LoadFromFile('page2.tiff');
ImageEnView1.IO.Params.PDF_Compression:= ioPDF_G4FAX; // G4Fax compression
ImageEnView1.IO.SaveToPDF;
..other pages..
// close PDF file
ImageEnView1.IO.ClosePDFFile;
This is an example (still copied from the help file...) using TImageEnMView:
// load a multipage TIFF and save back to a multipage PDF file
ImageEnMView.MIO.LoadFromFile('multipage.tiff');
ImageEnMView.MIO.SaveToFilePDF('output.pdf');