hresult 0x800ac472

COMATLATLMFCMFC mfciunknownmfcccmdtargetcommfccom mfccom1.1.1#pragma oncetypedef long hresult;//{30df3430-0266-11cf-baa6-00aa003e0eed}extern const GUID clsid_math;//{0x30df3430, 0x266, 0X11CF, {0xba, 0xa6, 0x0, 0xaa, 0x0, 0x3e, 0xe, 0xed}};///////////////////////////////////////////////////////// {30df3432-0266-11cf-baa6-00aa003e0eed}extern Const GUID iid_ioperator;//{ 0x30df3432, 0x266, 0X11CF, {0xba, 0xa6, 0x0, 0xaa, 0x0, 0x3e, 0xe, 0xed}};class iop

},Mailieband_tlb in 'mailieband _ TLB. pa '; ExportsDllgetclassobject,Dllcanunloadnow,Dllregisterserver,Dllunregisterserver; {$ R *. TLB} {$ R *. Res} BeginEnd. Program list 1-7 bandunit. Pas Unit bandunit; Interface UsesWindows, sysutils, messages, registry, shellapi, ActiveX, classes, comobj,Shlobj, dialogs, commctrl, shdocvw, ieform; TypeTgetmailband = Class (tcomobject, ideskband, iobjectwithsite, ipersiststreaminit)PrivateFrmie: tform1;M_psite: iinputobjectsite;M_hwndparent: hwnd;M_hwnd: h

There are few examples of searching com aggregation on the Internet, either using ATL, simulating ATL, or simulating MFC. Most of them are based on principles. Since the process for querying the iunknown interface is different when you simulate MFC and when you actually use MFC, the method for simulating MFC is different from that for directly deriving from csf-target, there are major differences in the process. Even if you understand the principle of COM aggregation, you may not be able to dire

icapturegraphbuilder2; it exposes methods to help build and control a capture graph. First, create instances of igraphbuilder and icapturegraphbuilder2 by using the com function cocreateinstance: Hresult = s_ OK; Igraphbuilder * pfiltergraph; Icapturegraphbuilder2 * pcapturegraphbuilder; Hresult = cocreateinstance (clsid_filtergraph, null, clsctx_inproc, Iid_igraphbuilder, (void **) pfiltergra

GetExternal method to implement an extended external object with the following code: Class Mydochandler:p ublic IDocHostUIHandler { Long RefCount; Public Mydochandler (): RefCount (1) {} Virtual HRESULT stdmethodcalltype QueryInterface (Refiid classid, void** intf) { if (ClassID = = IID_IUnknown) { *intf = (iunknown*) this; AddRef (); } else if (ClassID = = Iid_idochostuihandler) { *intf = (idochostuihandler*) this; AddRef (); } else

external object, the getexternal method mentioned above is called to query whether extended object is provided. The following is how to implement the getexternal method to implement extended external object. The Code is as follows: Class mydochandler: Public idochostuihandler { Long refcount; Public: Mydochandler (): refcount (1 ){} Virtual hresult stdmethodcalltype QueryInterface (refiid classid, void ** INTF ){ If (classid = iid_iunknown) { * INTF

passages can be viewed as files in the folder. If you insert a picture in your document, you can create a small folder in the folder-the Pictures folder-and add a shortcut to the content of each page in the location where you use the picture. The following illustration shows the concept of a previous description (note-I don't see the source code for Office, which is just one of my little guesses): COM interface for structured storage files Just finished the concept, in COM, the IStorage int

functions of CDB and cdbsrvfactory are changed into pure virtual functions. 2 Delete data members. 3 Delete all the member functions of the derivation of the flag. 4 Change the CDB to IDB (the interface of DB), Cdbsrvfactory to Idbsrvfactory (the interface of DB class factory) typedef long HRESULT;#define Def_export __declspec (dllexport)Class IDB{InterfacesPublicInterface for data accessVirtual HRESULT R

by the client program. Including the following steps: 1 The functions of CDB and cdbsrvfactory are changed into pure virtual functions. 2 Delete data members. 3 Delete all the member functions of the derivation of the flag. 4 Convert CDB to IDB (interface for DB), Cdbsrvfactory to Idbsrvfactory (representing DB class factory interface) typedef long HRESULT;#define Def_export __declspec (dllexport)Class IDB{InterfacesPublic:Interface for data accessVi

~ Ccriticalsection () { } Hresult lock () Throw () { Entercriticalsection ( m_sec ); Return s_ OK; } Hresult unlock () Throw () { Leavecriticalsection ( m_sec ); Return s_ OK; } Hresult Init () Throw () { Hresult hres = e_fail; Try { Initializecriticalsection ( m_sec ); Hres = s_ OK; } Catch (...) { Hres = e_outofmemo

Frmupdate = Class (tform, ibindstatuscallback)Imgtop: timage;Lbltop: tlabel;Spdbtnclose: tspeedbutton;Bevel1: tbevel;Plstatus: tpanel;PLINFO: tpanel;Btncancel: tflatspeedbutton;Tmrudapte: ttimer;Plprogress: tpanel;Procedure tmrudaptetimer (Sender: tobject );Procedure btncancelclick (Sender: tobject );Procedure formpaint (Sender: tobject );Procedure imgtopmousemove (Sender: tobject; shift: tshiftstate; X, Y: integer );Procedure spdbtncloseclick (Sender: tobject );PrivateFunction onstartbinding (d

). After reading this article, you will be able to learn how to use the built-in components in the Windows operating system and the COM objects provided by third parties.This document assumes that you are proficient in the C ++ language. In the example code, we use a bit of MFC and ATL. If you are not familiar with MFC and ATL, this article will thoroughly explain these codes. This article includes the following parts: Com -- what is it? -- Main Points of the COM standard, which is designed t

Urlopenstream is similar to urldownloadtofile, and is a com function for downloading files; The former is downloaded to the istream stream, and the latter is directly downloaded to the specified path. It is not as convenient as the latter. They are all declared in the urlmon unit. In this example, uses ActiveX is also required because the istream interface is used. Function urlopenstream (P1: iunknown; {interface, don't use it, just give nil} P2: pwidechar; {path to download} P3: D

The COM functions used by both methods are derived from the Urlmon, remember to refer to them first.First, UrldownloadtofileTo download files directly to disk, Urldownloadtofile declares as follows:function Urldownloadtofile (Caller:iunknown;Url:pwidechar; {Path to download}Filename:pwidechar; {The path saved to}Reserved:dword;Statuscb:ibindstatuscallback): HResult; stdcall;Urldownloadtofilea (Caller:iunknown; Url:pansichar; Filename:pansichar; Reserv

iid_ishelldispatch;# If defined (_ cplusplus )! Defined (cinterface)Interface declspec_uuid ("D8F015C0-C278-11CE-A49E-444553540000 ")Ishelldispatch: Public idispatch{Public:......Virtual hresult stdmethodcalltype minimizeall (void) = 0;Virtual hresult stdmethodcalltype undominimizeall (void) = 0;Virtual hresult stdmethodcalltype filerun (void) = 0;Virtual

description struct dsbpositiony y m_aposnotify [num_rec_configurications + 1]; // notify flag ArrayHandle m_hpolicyevent; // handle Y eventBool m_abinputfmtsupported [20];DWORD m_dwcapbufsize; // capture loop buffer sizeDWORD m_dwnextcapoffset; // offset in loop bufferDWORD m_dwpolicysize; // adjust y POS when loop buffer need to emit the event cadoframehandler * m_frame_handler; // outer frame data dealer PTRPublic: // callback func to add Enum devices string nameStatic bool callback enum_dev_

Whenever you use the thumbnail view in the shell, the shell will display a small preview of the file; in order to produce the preview the shell uses the iextractimage interface wich is declared as follows: Iextractimage = interface (iunknown)['{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}']Function getlocation (buffer: pwidechar; buffersize: DWORD;Priority: pdword; const size: tsize;Colordepth: DWORD; flags: pdword): hresult; stdcall;Function extract (var b

The method for listing all Shell objects is not provided below. For more information, see Ishelldispatch: Public idispatch {// you must specify the name of the control panel program. cpl suffix hresult controlpanelitem (BSTR szdir); // causes the Start menu to refresh its contentshresult refreshmenu (void); // find the computer hresult findcomputer (void ); // pop up the search file dialog box

VB6.0 uses soaptoolkit to access WebService In VB6.0, how to access a WebService has many instances, which are easy to find. I will not go into detail here. For Setup and usage, see this article "using Microsoft soap Toolkit 2.0 to build a secure web service". However, there are always many problems in use. The two most common problems are listed below: 1. Use mssoap. soapclient object This object can support the WSDL of a lower version, but the following error occurs in the WSDL of a higher ve

description of the security interface implemented by ATL. For Activex written by MFC, you can modify the Registry to implement control security. Microsoft also provides a detailed document description. The specific implementation steps are as follows: 1. Add the cathelp. h and cathelp. cpp files to the project. The contents are as follows. Cathelp. h # include " comcat. h " // helper function to create a component category and associated // description