This works:

*FORM PRINTPDF METHOD:
LPARAMETERS llprompt

IF TYPE('llprompt') <> "L"
	llprompt = .F.
ENDIF

IF llprompt 		&& print with prompt
	this.ieole.ExecWb(6,0,0,0)
ELSE			&& print without prompt (2nd parameter of 2 supresses prompt)
	this.ieole.ExecWb(6,2,0,0)
ENDIF
RETURN .T.

>I guess it should work. See http://support.microsoft.com/kb/188271/EN-US/
>
>>We are not using the builtin toolbar. Instead we display our own. I want to get it working because we will using the same thing to print whatever is displayed in the activex control (which may not be a pdf in the future but maybe a webpage or xml document).
>>
>>I have found some information on doing it in Delphi that I am trying to translate to VfP:
>>
>>UPDATE:
>>
>>I think it might be:
>>
>>

>>thisform.webcontrol.ExecWb(6,0,0,0)
>>

>>
>>The control has a method execwb():
>>
>> // constants useful when printing
>> SHDocVw.OLECMDID Print = SHDocVw.OLECMDID.OLECMDID_PRINT;
>> // use this value to print without prompting
>> // SHDocVw.OLECMDEXECOPT PromptUser =
>> // SHDocVw.OLECMDEXECOPT.OLECMDEXECOPT_PROMPTUSER;
>> SHDocVw.OLECMDEXECOPT DontPromptUser =
>> SHDocVw.OLECMDEXECOPT.OLECMDEXECOPT_DONTPROMPTUSER;
>>
>> if (!IsPrinterEnabled() ) return;
>> // print without prompting user
>> axWebBrowser1.ExecWB(Print, DontPromptUser, ref o, ref o);
>> // to prompt the user with printer settings
>> // axWebBrowser1.ExecWB(Print, PromptUser, ref o, ref o);
>>}
>>
>>ExecWB( OLECMDID_PRINT, OLECMDEXECOPT_PROMPTUSER );
>>
>>type
>> OLECMDID = TOleEnum;
>>const
>> OLECMDID_OPEN = $00000001;
>> OLECMDID_NEW = $00000002;
>> OLECMDID_SAVE = $00000003;
>> OLECMDID_SAVEAS = $00000004;
>> OLECMDID_SAVECOPYAS = $00000005;
>> OLECMDID_PRINT = $00000006;
>> OLECMDID_PRINTPREVIEW = $00000007;
>> OLECMDID_PAGESETUP = $00000008;
>> OLECMDID_SPELL = $00000009;
>> OLECMDID_PROPERTIES = $0000000A;
>> OLECMDID_CUT = $0000000B;
>> OLECMDID_COPY = $0000000C;
>> OLECMDID_PASTE = $0000000D;
>> OLECMDID_PASTESPECIAL = $0000000E;
>> OLECMDID_UNDO = $0000000F;
>> OLECMDID_REDO = $00000010;
>> OLECMDID_SELECTALL = $00000011;
>> OLECMDID_CLEARSELECTION = $00000012;
>> OLECMDID_ZOOM = $00000013;
>> OLECMDID_GETZOOMRANGE = $00000014;
>> OLECMDID_UPDATECOMMANDS = $00000015;
>> OLECMDID_REFRESH = $00000016;
>> OLECMDID_STOP = $00000017;
>> OLECMDID_HIDETOOLBARS = $00000018;
>> OLECMDID_SETPROGRESSMAX = $00000019;
>> OLECMDID_SETPROGRESSPOS = $0000001A;
>> OLECMDID_SETPROGRESSTEXT = $0000001B;
>> OLECMDID_SETTITLE = $0000001C;
>> OLECMDID_SETDOWNLOADSTATE = $0000001D;
>> OLECMDID_STOPDOWNLOAD = $0000001E;
>> OLECMDID_ONTOOLBARACTIVATED = $0000001F;
>> OLECMDID_FIND = $00000020;
>> OLECMDID_DELETE = $00000021;
>> OLECMDID_HTTPEQUIV = $00000022;
>> OLECMDID_HTTPEQUIV_DONE = $00000023;
>> OLECMDID_ENABLE_INTERACTION = $00000024;
>> OLECMDID_ONUNLOAD = $00000025;
>> OLECMDID_PROPERTYBAG2 = $00000026;
>> OLECMDID_PREREFRESH = $00000027;
>> OLECMDID_SHOWSCRIPTERROR = $00000028;
>> OLECMDID_SHOWMESSAGE = $00000029;
>> OLECMDID_SHOWFIND = $0000002A;
>> OLECMDID_SHOWPAGESETUP = $0000002B;
>> OLECMDID_SHOWPRINT = $0000002C;
>> OLECMDID_CLOSE = $0000002D;
>> OLECMDID_ALLOWUILESSSAVEAS = $0000002E;
>> OLECMDID_DONTDOWNLOADCSS = $0000002F;
>>
>>// OLECMDF constants
>>type
>> OLECMDF = TOleEnum;
>>const
>> OLECMDF_SUPPORTED = $00000001;
>> OLECMDF_ENABLED = $00000002;
>> OLECMDF_LATCHED = $00000004;
>> OLECMDF_NINCHED = $00000008;
>> OLECMDF_INVISIBLE = $00000010;
>> OLECMDF_DEFHIDEONCTXTMENU = $00000020;
>>
>>// OLECMDEXECOPT constants
>>type
>> OLECMDEXECOPT = TOleEnum;
>>const
>> OLECMDEXECOPT_DODEFAULT = $00000000;
>> OLECMDEXECOPT_PROMPTUSER = $00000001;
>> OLECMDEXECOPT_DONTPROMPTUSER = $00000002;
>> OLECMDEXECOPT_SHOWHELP = $00000003;
>>
>>// tagREADYSTATE constants
>>type
>> tagREADYSTATE = TOleEnum;
>>const
>> READYSTATE_UNINITIALIZED = $00000000;
>> READYSTATE_LOADING = $00000001;
>> READYSTATE_LOADED = $00000002;
>> READYSTATE_INTERACTIVE = $00000003;
>> READYSTATE_COMPLETE = $00000004;