So, please use TChromium add print control (DLL) why not:
The begin
//CefOnBeforeCommandLineProcessing:=OnFlash;
CefLocale:='useful - CN;
If not CefLoadLibDefault then Exit;

CefAddWebPluginPath (ExtractFilePath (Application. Exename) + 'NPCAOSOFT_WEB_PRINT_lodop. DLL');

CefRefreshWebPlugins ();

Application. The Initialize;
Application. MainFormOnTaskbar:=True;

Application CreateForm (TForm1 Form1);
Application CreateForm (TForm2, Form2);
Application CreateForm (TForm3, Form3);
Application. The Run;
End.

When printing or quote to install control!!!!!