hresult 0x800ac472

function to obtain the function of this interface. You can implement this function by yourself. Generally, we give the control a unique ID in the document for easy access. First, we need to find this element in the document and use ID as the parameter. ExampleCode: (Refer to the mfc7.0Source code) // Document modified at: Sunday, August 18,200 2 11:04:50, by user: jiangsheng, from computer: KFB// Access the element interface by name Hresult cd

C = 0;C = A + B;Return C;}Public float Ladd (float a, float B){Float C = 0;C = A + B;Return C;}}} (2) write the calling program using vc6.0 Use vc6.0 to write and create the MFC Application usecom. The project type is MFC Appwizard (exe) Add the following in stdafx. h: # Import "addcom. TLB"Using namespace addcom; Program code: Void cusecomdlg: onbuttonuse (){// Todo: add your control notification handler code hereInt dresult;Float fresult;Cstring strresult; Coinitialize (null); //

Getdestopwindow obtains the handle of the desktop window, but it is not the window containing the icon we see. The window containing the icon is actually one of the rows topwindow.Window. To be exact, desktopWindow contains a subwindow with no title and the class name "shelldll_defview". This word window also contains a untitled and Class Name"Syslistview32" subwindow -- this is the window that actually contains the desktop icon. To operate the desktop icon, use the following functions,Hwnd get

the program into three steps: 1. Build a DirectDraw surface ). 2. Extract video streams from files (possibly audio ). 3. Play video streams on the DirectDraw surface. Necessary variables: Ddsurfacedesc ddsd;Idirectdraw * PDD;Idirectdrawsurface * pprimarysurface;Imultimediastream * pmmstream; The imultimediastream interface is the highest-level interface object in DirectShow. It can contain one or more multimedia objects. These multimedia objects can be of different types, such as

new instance of the Internet Explorer browser. In some cases, BHO is also applicable to Windows Resource Manager.Generally, a site is an intermediate object located between the container object and the contained object. Through it, container objects are managed to accommodate the content of objects, so internal functions of objects are available. Therefore, the container must implement the IoleClientSite interface, and the IOleObject interface must be implemented for the contained objects. By c

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