hresult

mode during runtimeIf you want to know whether the plug-in is running in the protection mode of the IE process, you can use ieisprotectedmodeprocess (): hresult ieisprotectedmodeprocess (bool * pbresult ); if the returned value is a successful hresult and * pbresult is true, it can be determined as the protection mode. In addition, based on the * pbresult returned value, you can also decide what to do next

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

obtained data pointer is actually the address of the type array. In the case of multi-dimensional arrays, the subscript of multiple dimensions must be converted into one-dimensional subscript for access. 2. safearrayunaccessdata This function is used to unlock the safearray data. After unlocking, the Data Pointer should not be read or written. If you want to access the service, you must obtain and lock the data again. 3. Determine the Array Structure Before accessing an array, you must know the

memory leakage.Adjacencyinfo-> release ();Mtrlbuffer-> release (); We can use the following 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 metho

object 5) create a notification object 6) set the notification location 7) start playing 2. Loop playback 1) Data is filled into the secondary buffer. 2) wait until the playback is complete 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 follow

memory is only used when the abstract base class is implemented in the derived class. To be allocated. When a derived class inherits an abstract base class, it inherits the memory structure.8. In COM, access to a component can only be done through functions, rather than directly using variables. 9. The real power of an interface is that all classes inheriting this interface can be processed by the customer in the same way. //////////////////////////////////////// //////////////////// Chapter 2

connection point Server Client can be written using C ++ and C # managed code. The C ++ client registers an instance of the class, which provides the implementation of the receiver interface. The hosting client registers a single event Delegate and creates a single receiver based on each event notification method. For details, refer to the interoperability section of C. I. Programming of connection points 1. Use ATL to create a component program. 2. Add ATL simple object and support connection

COM (5) -- inherit from the idispatch Interface (1) ObjectivesThis article uses a simple example to describe how to make our COM Object accessible to the scripting language. (2) IDL filesTo use COM components in the script language environment, the COM specification specifies that the COM to be used in the script language environment must implement the idispatch interface.The itimebeijing interface is defined below. Note the differences between this file and our previous file: Import "oaidl. IDL

the party for post-processing. As a COM ObjectIn our AOP framework, we implement the com class of the iaspect interface, as shown in 3. Interface iaspect: iunknown {Hresult preprocess ([in] iunknown * punkdelegatee,[In] BSTR riid,[In] BSTR strmethodname,[In] Long nvtblslot,[In] iunknown * penum );Hresult postprocess ([in] hresult hroriginal,[In] iunknown * p

It seems that Microsoft Source reader is still quite difficult to use because of its needs. In fact, according to the example provided by Microsoft, You can normally debug the program. The following example shows the source reader code. At the same time, the pointer is used in the hresult createvideodevicesource (imfmediasource ** ppsource) function to correctly export the ppsource, not null. Before debugging, use

# Include # Include # Pragma comment (lib, "wmvcore. lib ")# Pragma comment (lib, "Rpcrt4.lib ")# Define FIELD_NUM 9# Define FIELD_LEN 1024Char _ sFileName [MAX_PATH];# Ifndef SAFE_RELEASE# Define SAFE_RELEASE (x )\If (NULL! = X )\{\X-> Release ();\X = NULL ;\}# Endif // SAFE_RELEASE# Ifndef SAFE_DELETE# Define SAFE_DELETE (x )\If (NULL! = X )\{\Delete x ;\X = NULL ;\}# Endif // SAFE_DELETE# Ifndef SAFE_ARRAYDELETE# Define SAFE_ARRAYDELETE (x )\If (NULL! = X )\{\Delete [] x ;\X = NULL ;\}# Endi

COM object createdAnd then how to call the COM component. Here is the method for calling the COM Object in C ++. There are generally three methods to create a COM object. You can create an object normally and use the cocreateinstance function. If you create an object in a remote system, use the cocreateinstanceex function. The cogetclassobject function is used to create multiple objects with the same clsid. 1. Use the cocreateinstance function to create a COM object. // Load the generated file

successfully, the COM library returns a pointer to the requested interface. You can then call methods through that pointer, just as if it were a pointer to a regular C + + object. Handling HRESULTsI ' ve already shown some simple error handling, using the? succeeded? FAILED? macros. Now I'll give some more details on what does with the? HRESULTs returned from COM methods. An ?HRESULT?is a 32-bit signed integer, with nonnegative values indicati

_wvermajor = 1;Const WORD _wverminor = 0;Const CATID Clsid_safeitem ={0XB548F3C7,0X2135,0X4242,{0X92,0X0B,0XA7,0XBD,0XEE,0X6D,0X2B,0XA3}};{0x36299202, 0x9ef, 0x4abf,{0xad, 0xb9, 0x47, 0xc5, 0x99, 0xdb, 0xe7, 0x78}};Ccardscanapp::initinstance-dll initializationBOOL ccardscanapp::initinstance (){BOOL binit = Colecontrolmodule::initinstance ();if (binit){}return binit;}Ccardscanapp::exitinstance-dll terminated.int Ccardscanapp::exitinstance (){return Colecontrolmodule::exitinstance ();}

memory through the D3dx11createshaderresourceviewfromfile function. of the functionThe prototype is as follows: HRESULT d3dx11createshaderresourceviewfromfile ( _in_ id3d11device *pdevice, _in_ LPCTSTR psrcfile, _in_ d3dx11_image_load_info *ploadinfo, _in_ id3dx11threadpump * Ppump, _out_ id3d11shaderresourceview **ppshaderresourceview, _out_ HRESULT

After work, in the reading of the code written by foreigners, found a very interesting thing, we often say goto statement is harmful, mainly it jumps to jump, upset logic. But Goto also has benefits, such as single-exit, unified freeing of memory aspects, the next look at a function of MAPI initializationintMapiinit () {intResult =Dt_error; HRESULT HRESULT=S_FALSE; HANDLE Hlock=NULL; BOOL bLocked=FALSE; DWO

The method of the COM component is declared in IDL: [ID (1), helpstring ("Method Inputarray")] HRESULT Inputarray ([in] VARIANT vdata); Methods to establish an array in a script and invoke a COM component: When the array is large, like 100k, JavaScript is very inefficient when assigning values to arrays! Completion time, CPU occupancy rate, memory consumption is terrible. Instead, VBScript did a good job. Code for COM components: You can see from

. Add a secure interface (Refer to http://blog.sina.com.cn/s/blog_5d154c460100f8z9.html)Add a header file to the project name Ctrl.h file#include Find Declare_dyncreate (project name ctrl)After that, add the following codeDeclare_interface_map () Begin_interface_part (Objsafe, IObjectSafety) Stdmethod_ (HRESULT, getinterfacesafetyoptions) ( refiid riid, *pdwsupportedoptions, * pdwenabledoptions ); Stdme

mechanism. About IUnknown It says that the component itself provides an interface to its own query, so what is this interface? This is the famous IUnknown interface, and the IUnknown interface is defined in the Windows SDK Unknwn.h, which is defined as follows: Copy Code code as follows: Interface IUnknown { Public Virtual HRESULT stdmethodcalltype QueryInterface (REFIID riid, _com_outptr_ void **ppvobject) = 0; Virtual ULO

automatic action feature does not support well-known parameters, and if you cannot use a detailed parameter, you need to pass a null as a placeholder, and second, each call returns an HRESULT of the integer type, which is 0 if the call succeeds. Later, we'll discuss how to handle the return value as non. Stored Procedure Descriptionsp_OACreate establish an instance of an automatic action objectsp_OADestroy frees an instance of an objectsp_OAGetErrorI