Sources
Delphi Russian Knowledge Base
DRKB - это самая большая и удобная в использовании база знаний по Дельфи в рунете, составленная Виталием Невзоровым

Работа с печатью в TWebBrowser

01.01.2007
{ 
  TWebBrowser can use native IE API to print and do other things. 
  Implement on a Form a TWebBrowser component, and a button to print. 
  The code attached to this button is as follow : 
} 
 
//-------------------------------------------- 
 
procedure TForm.OnClickPrint(Sender: TObject); 
begin 
  WebBrowser.ExecWB(OLECMDID_PRINT, OLECMDEXECOPT_PROMPTUSER); 
end; 
 
//-------------------------------------------- 

You can replace "OLECMDID_PRINT" by other possibilities :

OLECMDID_OPEN OLECMDID_NEW OLECMDID_SAVE

OLECMDID_SAVEAS OLECMDID_SAVECOPYAS OLECMDID_PRINT

OLECMDID_PRINTPREVIEW OLECMDID_PAGESETUP OLECMDID_SPELL

OLECMDID_PROPERTIES OLECMDID_CUT OLECMDID_COPY

OLECMDID_PASTE OLECMDID_PASTESPECIAL OLECMDID_UNDO

OLECMDID_REDO OLECMDID_SELECTALL OLECMDID_CLEARSELECTION

OLECMDID_ZOOM OLECMDID_GETZOOMRANGE OLECMDID_UPDATECOMMANDS

OLECMDID_REFRESH OLECMDID_STOP OLECMDID_HIDETOOLBARS

OLECMDID_SETPROGRESSMAX OLECMDID_SETPROGRESSPOS

OLECMDID_SETPROGRESSTEXT

OLECMDID_SETTITLE OLECMDID_SETDOWNLOADSTATE OLECMDID_STOPDOWNLOAD

OLECMDID_FIND OLECMDID_ONTOOLBARACTIVATED OLECMDID_DELETE

OLECMDID_HTTPEQUIV OLECMDID_ENABLE_INTERACTION OLECMDID_HTTPEQUIV_DONE

OLECMDID_ONUNLOAD OLECMDID_PROPERTYBAG2 OLECMDID_PREREFRESH

Взято с сайта https://www.swissdelphicenter.ch/en/tipsindex.php