hresult 0x800706ba

D3dxmatrix * winapi d3dxmatrixlookatlh (d3dxmatrix * pout,Const d3dxvector3 * peye,Const d3dxvector3 * Pat,Const d3dxvector3 * pup);This function is used to control the camera and view matrix.Peye's eye position and observation direction.Pat is the forward and backward direction of the camera, left or right. Up or down.Pup is the upward direction.Matrixanimation class simplifies the processing of direction observation.// Matrix AnimationNamespace matrixa {# Include Class matrixanimation { Public

data type, dimension, and lower bound and length of each dimension in the array. Com provides functions to obtain these array parameters. Obtain the type and return the enumerated values of the type starting with "VT: Hresult safearraygetvartype ( Safearray * PSA, Vartype * pvartype ); Returns the dimension of the array: Uint safearraygetdim ( Safearray * PSA ); Obtain the attributes of each dimension and return the upper and lower bounds of the

function to create an empty id3dxbuffer object.Hresult d3dxcreatebuffer (DWORD numbytes, lpd3dxbuffer * ppbuffer ); Create a cache that can hold 4 data recordsId3dxbuffer * buffer = 0;D3dxcreatebuffer (4 * sizeof (INT), buffer ); The. x format is the DirectX-defined format, which is strongly supported by the d3dx library. The d3dx Library provides functions for loading and saving XFile files. This method creates an id3dxmesh object and loads the geometric data in XFile to this object.

The following describes the process in detail. 1. Initialization1) Create an IDirectSound8 interface object You can use the DirectSoundCreate8 () method to create a device object. This object usually represents the default playing device. The DirectSoundCreate8 () function is defined as follows. HRESULT DirectSoundCreate8( LPCGUID lpcGuidDevice, LPDIRECTSOUND8 * ppDS8, LPUNKNOWN pUnkOuter) The parameters are described as follows: LpcGuidDevice: G

real power of an interface is that all classes inheriting this interface can be processed by the customer in the same way. //////////////////////////////////////// //////////////////// Chapter 2 QueryInterface Functions 1. Interface query:The customer interacts with the component through an interface. Other interfaces of the customer query component are also completed through interfaces. . This interface is iunknown.The iunknown interface definition is included in the unknown. h header file of

The simplest language to call COM components is, of course, C + +, but in some cases it has to be in C language. This article describes the methods for calling COM components in C language.To better understand C's approach, let's take a look at how C + + calls COM components.First, C + + modeStarting with Windows 7, the taskbar can display a progress bar, which is an example of this interface.ITaskbarList4 *ptaskbar = nullptr; HRESULT

of null is 0, addcom: addcominterfaceptr p_add (_ uuidof (addcomservice); dresult = p_add-> iadd (1.2); fresult = p_add-> FADD, 2.3); strresult. format ("int: % d/nfloat: % F", dresult, fresult); MessageBox (strresult, "calculation result", mb_ OK); couninitialize ();}3. Compile COM components in vc6.0 and use vs2005 C # To call(1) Write COM in vc6.0Use vc6.0 to create a COM component. Project type: atl com AppwizardProgram code:Interface: Interface iadd: idispatch {[ID (1), helpstring ("method

Grid 2 ID3DXBuffer The ID3DXBuffer interface is a generic data structure. This interface has two methods. · LPVOID GetBufferPointer (); returns the pointer pointing to the starting position of data in the cache. · DWORD GetBufferSize (); return the cache size, in bytes. To ensure the versatility of this interface, this interface uses the void type pointer, which means that we must implement the data type to be stored. For example, the D3DXLoadMeshFromX function returns the adjacent information

follows: # Ifndef DROP_TARGET_EX_H # define DROP_TARGET_EX_H # include "OleIdl. h "# include" ShObjIdl. h "typedef struct _ DRAGDATA {int cfFormat; STGMEDIUM stgMedium;} DRAGDATA, * LPDRAGDATA; typedef void (* DROPCALLBACK) (CFrameWnd *, HDROP); class metadata: public IDropTarget {public: CDropTargetEx (CFrameWnd * pMainWnd); virtual ~ Revoke (); BOOL DragDropRegister (HWND hWnd, DWORD AcceptKeyState = MK_LBUTTON); hresult stdmethodcalltype QueryIn

. HRESULT AddToRot(IUnknown *pUnkGraph, DWORD *pdwRegister) { IMoniker * pMoniker = NULL; IRunningObjectTable *pROT = NULL; if (FAILED(GetRunningObjectTable(0, pROT))) { return E_FAIL; } const size_t STRING_LENGTH = 256; WCHAR wsz[STRING_LENGTH]; StringCchPrintfW(wsz, STRING_LENGTH, L"FilterGraph %08x pid %08x", (DWORD_PTR)pUnkGraph, GetCurrentProcessId()); HRESULT hr = CreateItemMoniker(L"!", wsz,

connections. Void cconnectmanager: enumnetidentifier (Out cstringarray strary){Connmgr_destination_info networkdestinfo = {0 };// Obtain the Network ListFor (DWORD dwenumindex = 0; dwenumindex ++){Memset ( networkdestinfo, 0, sizeof (connmgr_destination_info ));If (connmgrenumdestinations (dwenumindex, networkdestinfo) = e_fail){Break;}Strary. Add (networkdestinfo. szdescription );}} Next, find the connection "Internet", which can be completed by remote URL ing, so that the system can automat

networkdestinfo = {0 };// Obtain the Network ListFor (DWORD dwenumindex = 0; dwenumindex ++){Memset ( networkdestinfo, 0, sizeof (connmgr_destination_info ));If (connmgrenumdestinations (dwenumindex, networkdestinfo) = e_fail){Break;}Strary. Add (networkdestinfo. szdescription );}} Next, find the connection "Internet", which can be completed by remote URL ing, so that the system can automatically select the best connection. Int cconnectmanager: mapurlandguid (maid, out guid guidnetworkobject,

). Export interfaceComponent information Functions Stdapi DllGetClassObject (__in refclsid rclsid, __in refiid riid, LPVOID far* PPV) {if (Rclsid = = clsid_easycom People) {cpeoplefactory *pfactory = new Cpeoplefactory;if (NULL = = pfactory) {return e_fail;} HRESULT hr = Pfactory->queryinterface (riid, PPV); return HR;} Else{return class_e_classnotavailable;}}This creates a factory object that returns a component of the specified CLSID.c). Uninstalli

. It should be noted that the above property settings will have the corresponding results in the Preview box below the dialog box. Getting and changing CSS properties of elements in a program To get and change the CSS properties of elements in the web dialog class, you can use the IHTMLElement interface, which provides a number of methods for HTML elements, where Get_style is used to manipulate attributes, including CSS, and its prototype is as follows: