hresult

. Nothing else needs to be changed, this allows the thread to synchronously access public data. Appendix: //////////////////////////////////////// ///////////// // Asynchronous code //////////////////////////////////////// //////////// # Ifndef asyn_h _ # Define asyn_h _ Class ccriticalsection { Public: Ccriticalsection () Throw () { Memset ( m_sec, 0, sizeof (critical_section )); } Virtual ~ Ccriticalsection () { } Hresult lock () Throw () { Enter

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

use the COM Object provided by a third party (taking the Windows Shell component shell as an example ). 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 inclu

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

to terminate COM. In the com standard, the only way to access the COM object is the COM interface. Therefore, you must first obtain the COM interface provided by the Program for operating the Windows system shell. The COM interface used is ishelldispatch, which is derived from the idispatch interface and is in the vc98/include/exdisp directory of the VC installation directory. the H header file has definitions. Some interface definitions to be used are excerpted below: ......Extern_c const IID

thousands of pages--you can imagine how slow the process is. If we look at a Word document as a small filesystem, we can look at it as a "folder" for every page in the document, and then all the text 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 previo

class, which is the only code required 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 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{Inte

handler PTR guid m_guidcapdevid; // capture device IDWaveformatex m_wfxinput; // input wave format 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 da

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

OLE Automation controllers sometimes receive event notifications from the prosecution. For example, webbrowser's onnavagitecomplete and ondocumentcomplete events. The OLE object must implement the iconnectionpointcontainer interface. Iconnectionpointcontainer and several other interfaces related to automation events are defined as follows: Ienumconnections = interface['{B196B287-BAB4-101A-B69C-00AA00341D07}']Function next (CELT: longint; out ELT;Pceltfetched: plongint):