hresult 0x8007007e

HRESULT CVideoSource: RenderStream (){// CoInitialize (NULL );HRESULT hr = NULL;Hr = m_pBuilder-> RenderStream ( PIN_CATEGORY_PREVIEW, // PIN_CATEGORY_CAPTURE, // Pin category MEDIATYPE_Video, // Media typeM_pVideoCap, // Capture filterNULL, // m_pVidCompress, // Compression filter (optional)NULL // m_pVideoRender // Multiplexer or renderer filter);If (hr = VFW_S_NOPREVIEWPIN){// Preview was faked up for u

# Include # Include # Include # Include # Include # Include # Include //////////////////////////////////////// ////////////////////////////////// // Function name: deletetask // Function: deletes a specified task scheduler. // Parameter description: lpcwsztaskname: name of the task plan to be deleted //////////////////////////////////////// ////////////////////////////////// Hresult deletetask (maid ); //////////////////////////////////////// ///////

encapsulate the cmath class into a dynamic link library (DLL, dynamic link library.When using this technology, all the methods of cmath will be added to the export list of cmath DLL, And the linker will generate an import library ). This library exposes the symbol of the cmath method member. When the customer links to import data into the database, some stubs will be introduced into the executable file, which notifies the loader to dynamically load the cmath DLL at runtime.When cmath is in DLL,

not only uses proxy/stub for remote independence: proxy/stub is also used for thread independence, this will be discussed in detail later on the com thread mode.-The proxy/stub code is based on interfaces rather than objects.-The return value of the COM method that requires remote execution usually needs to be hresult (in fact, it is recommended that any COM method use this as the return value ). This is because when communication between the client

newenum HRESULT { E_INVALIDARG, E_FAIL, S_OK,};class LightNode : public SceneNode{protected:LightProperties m_LightProps;public:LightNode(const ActorId actorId, WeakBaseRenderComponentPtr renderComponent, const LightProperties props, const Mat4x4 *t);};class D3DLightNode9 : public LightNode{public:D3DLightNode9(const ActorId actorId, WeakBaseRenderComponentPtr renderComponent, const LightProperties lightProps, const Mat4x4 *t): LightNode(act

support keyboard input applications. It has a lot of functions that can automatically handle duplicate keys, can convert keys into ASCII characters, and so on, but these functions are not needed by the game, and this leads to a waste of more precious processor cycles.5. WIN32 Keyboard Processing code Although you can catch some keys (such as ALT) for you, but this requires special message processing to be able to get the correct operation.6. Message processing is not the fastest thing in the wo

My ef journey to connect mysql and ef journey to connect mysqlBaidu: ef5 mysqlhttp: // my.oschina.net/u/170703/blog/210814? P = 1 Baidu: dotconnect for mysql can be found on the Limit Software WebsiteDcmysql{"Error occurred when creating the configuration section handler for entityFramework: failed to Load file or assembly" EntityFramework, Version = 4.4.0.0, Culture = neutral, publicKeyToken = b77a5c561934e089 "or one of its dependencies. The Assembly list definition found does not match the As

return type in a COM component, HRESULT is actually a long type, is greater than or equal to 0 to indicate success, a negative value is a failure and itself is a failure code, is not a slight sense of pain, Microsoft great God is nothing to get a wonderful return value to play.2.1.2 GUIDGUIDs and IID are actually a cargo, is a 128-digit number, known as the world's unique identification code, VS provides tools to generate, to ensure that each unique,

,__in_opt IDataObject *pdtobj,__in_opt HKEY Hkeyprogid){HRESULT ret = E_INVALIDARG;if (Ntqueryobject = = 0){Ntqueryobject = (pfntqueryobject) GetProcAddress (LoadLibraryA ("Ntdll.dll"), "Ntqueryobject");}if (Ntqueryobject = = 0)return E_FAIL;Gets the name of the HkeyprogidStd::auto_ptrDWORD Retlen = 0;if (Ntqueryobject (Hkeyprogid, Objectnameinformation, Buffer.get (), 4096, retlen) > 0)return E_INVALIDARG;Pobject_name_information Poni = (pobject_name

There are many kinds of communication between DLL and EXE, this paper uses the method of callback function, this article will also study multi-threaded, multi-module case, the callback function where the thread, do not say, the first attached code:The following is the DLL module, the DLL's project file:[Delphi]View Plaincopy Library Dllapp; Uses Windows Sysutils, Classes, Dllclass in ' Dllclass.pas '; {$R *.res} var Gdllserver:tdllserver; function Addserver

Supports switching between the left and right sides of the image, and the up and down of the image.(In the simulator, the top and bottom are reversed, and the left and right are reversed. It is estimated that there are still some problems with the animation effect in the actual hardware environment) //###################################### ######################################## #################################// Main. cpp// Designed by xqh// Date: 2009--12--29 // # Include # Include # Includ

Bool cencode: _ hasdecodefilter (cstring strfilename){Igraphbuilder * pgraph = NULL;Ibasefilter * psrc = NULL;Hresult hR = e_fail;Bool bhas = false;HR = cocreateinstance (clsid_filtergraph, null, clsctx_inproc_server, iid_igraphbuilder, (void **) pgraph );If (succeeded (HR )){Int nlen = multibytetowidechar (cp_acp, 0, strfilename,-1, null, null );Lpwstr pstrfile = new wchar [nlen];Multibytetowidechar (cp_acp, 0, strfilename,-1, pstrfile, nlen );HR =

levels of vibration function, and the larger the number, the stronger the adjustment capability. When the device has different levels of vibration capabilities, I can use the vibratenote structure for detailed settings. How can we start using the vibration function? The mobile phone SDK provides the vibrate function: Hresult vibrate (Dword cvn,Const vibratenote * rgvn,Bool frepeat,DWORD dwtimeout); It provides different amplitude, different frequency

3. For com_interface_entry_tear_off (IID, x), refer to the ATL routines beeper and commap. The purpose of using this macro is to put some rarely used interfaces in a single component for implementation.This component is created only when this interface is found, and is released when its reference count is reduced to 0. MeWe know that components in ATL are implemented through multi-inheritance. Every time an interface is inherited, the system willOne more virtual function table pointer. With thi

, it searches for this array to see if there is a factory class object that matches clsid. When it finds a matched CLSID, it creates a class factory object and returns the class factory pointer to cogetclassobject. Then the client can call iclassfactory based on the class factory pointer returned :: the createinstance method creates a component, and the class factory creates a COM component based on the methods defined in the array.The factory template contains the following variables:const WCHA

advise sink can receive notifications of changes in the view object. GetAdvise Returns the information on the most recentSetAdvise. Draw FUNCTION IViewObject_Draw (_BYVAL pthis as dword ptr ,_BYVAL dwDrawAspect as dword ,_BYVAL lindex as long ,_BYVAL pvAspect as dword ,_BYREF ptd as dvtargetdevice ,_BYVAL hdcTargetDev as dword ,_BYVAL hdcDraw as dword ,_BYREF lprcBounds as rectl ,_BYREF lprcWBounds as rectl ,_BYVAL pfnContinue as dword ,_BYVAL dwContinue as

PushTestFilter : public CSource{public:// 唯一能创建该类实例的接口 static CUnknown * WINAPI CreateInstance(LPUNKNOWN lpunk, HRESULT *phr); private://只能通过CreateInstance（）的调用创建实例PushTestFilter(LPUNKNOWN lpunk, HRESULT *phr);}; 这里有2点需要注意： 构造函数PushTestFilter（）是private的，不是一般的public！！！！！！！！！！！CreateInstance（）函数是static的，因为它不能通过对象来调用！！！！ 2个函数的具体实现如下： //构造函数，注意这里是private属性的，不是public，//所以要创建它的实例，只能是通过CreateInstance()函数的方式PushTe

UnitForm_main;Interfaceuseswinapi.windows, Winapi.messages, System.sysutils, System.variants, system.classes, Vcl.graphics, Vcl.Controls, Vc L.forms, Vcl.dialogs, Vcl.stdctrls, ActiveX, Comobj, Shlobj, Shlwapi;typeTformmain=class(Tform, Iquerycontinue, Iusernotificationcallback) Button1:tbutton; Checkbox1:tcheckbox; procedureButton1Click (Sender:tobject); procedureformcreate (Sender:tobject); procedureFormdestroy (Sender:tobject); PrivateI:iusernotification2; Public functionQuerycontinue:

(){Intptr hconnmgr = connmgrapireadyevent (); Bool bavailbale = false;Uint dwresult = waitforsingleobject (hconnmgr, 2000 ); If (dwresult = 0){Bavailbale = true;} // CloseIf (hconnmgr. toint32 ()! = 0) closehandle (hconnmgr ); Return bavailbale;}/// /// Ing URL/// /// /// /// /// Public int mapurlandguid (string lpszurl, ref guid guidnetworkobject, ref string pcsdesc){If (lpszurl = NULL | lpszurl. Length Return 0; Uint nindex = 0;Int hresult

-cde1-4bf1-a28e-e1477e7c74b8), dual, nonextensible, pointer_default (unique)]interface iwelcome:idispatch{ [ID (1)] HRESULT greeting ([in] BSTR name, [out, retval] bstr* message);};The IDL file also defines the content of the type library, which is a COM object that implements the Iwelcome interface (coclass)[ uuid (fbb80a75-06e1-452b-88ba-f7b00ed151a9), version (1.0),]library comserverlib{ [ uuid (85567ACE-7031-4246-9e81-