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The idispatch interface is the core of COM automation. In fact, the idispatch interface is also very simple, there are only four methods: IDispatch : public IUnknown { public: virtual HRESULT STDMETHODCALLTYPE GetTypeInfoCount( /* [out] */ __RPC__out UINT *pctinfo) = 0; virtual HRESULT STDMETHODCALLTYPE GetTypeInfo( /* [in] */ UINT iTInfo,
); // obtain the server Date and Time hresultSvrtime([Out, retval] mtktime * time ); //////////////////////////////////////// ////////////// log in and out, login must be the server method of 1st calls /////////////////////////////// /// // log on to the system, obtain the User Token and full graph URL. The hresult must be provided for any method call in the future.Login([In] BSTR username, [in] BSTR password); // log out of the system and log out the
among the three methods. ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- Prerequisites:The COM server is an in-process server, and the DLL name is simpCOM. dll. This component has only one interface IFoo, and this interface has only one method HRESULT SayHello (void) Call in SDK============================================1. The simplest and most
, provides methods to open the file dialog box. Ifilesavedialog:FilesavedialogCom class implementation, provides methods for saving the file dialog box. Ifiledialog:IfileopendialogAndIfilesavedialogProvides the implementation of most of the functions that interact with and customize the dialog box. Imodalwindow:Ifiledialog. The show method is provided. Ifiledialogcustomize:FileopendialogAndFilesavedialogCom class implementation provides support for adding new controls in the dialog b
acquisitionmethod of "bodyindex". Figure 1 sample program for Kinect SDK v2 Preview (bodybasics) PutBodyindex The position of the color coordinate to intercept，tiny parts like fingers can be clearlyHumanthe body is preserved. (Note: The conversion of the coordinate space is required because the camera location of color and depth is different)Sample ProcedureUse the Kinect SDK v2 preview to get Bodyindex, and show the sample programs that each body is color-coded and displayed. The 2nd section
In the previous article, "COM Component Development Practice" (V)---from C + + to COM:P Art 2, we are going to use the COM library to load C + + objects, and in this article we will actually turn the C + + object into a COM object, and in the next article we will add multiple interface support to it. C + + objects become COM objects To turn a C + + object into a real COM object, you only need to do the following: 1 Implement the reference count of the interface. Therefore, each COM object req
Article 5: Learn about the historical reasons behind the _ com_ptr_t Design_ Com_ptr_t is a proprietary template class of Microsoft in VC. It encapsulates the QueryInterface (), AddRef (), and Release () operations of IUnknown, and provides some member functions to operate COM interface pointers. At the same time, _ com_ptr_t also simplifies the operations of the COM interface on reference count and query operations between different interfaces. To use the smart pointer _ com_ptr_t, you must fir
public: IUnknown{Public:Virtual hresult stdmethodcalltype Add (Const int nNum1,Const int nNum2,Int * pnSum) Const = 0;Virtual hresult stdmethodcalltype Sub (Const int nMinuend,Const int nSubtrahend,Int * pnQuotient) Const = 0;};// {994d80ac-a5b1-440a-a3e9-2533100b87ce}DEFINE_GUID (IID_ICALCULATOR,0x994d80ac, 0xa5b1, 0x430a, 0xa3, 0xe9, 0x25, 0x33, 0x10, 0xb, 0x87, 0xce );Class ICalculator public: IUnknown{
Grid (1) Geometric Information The ID3DXBaseMesh Interface contains a vertex cache (used to store grid vertices) and an index cache (used to determine how a vertex forms a mesh of triangle units ). HRESULT ID3DXMesh: GetVertexBuffer (LPDIRECT3DVERTEXBUFFER9 * ppVB ); HRESULT ID3DXMesh: GetIndexBuffer (LPDIRECT3DINDEXBUFFER9 * ppIB ); Example: Code highlighting produced by Actipro CodeHighlighter (freeware)h
interface and the internal interface//************************************** ************Ihtmltable * cshtmlreport: gettabledispatch (){Assert (m_phtmldoc2 );Ihtmlelementcollection * All;M_phtmldoc2-> get_all ( all );Idispatch * distable;All-> item (colevariant (m_strtablename), colevariant (short (0), distable );Ihtmltable * pitable = NULL;Hresult hR = distable-> QueryInterface (iid_ihtmltable, (void **) pitable); // get table dispatchAssert (hR =
implemented this by defining connectable objects. Let's start by examining the com interfaces involved in connections-IConnectionPointAndIConnectionPointContainer. The object (rather than the client) implements both these interfaces. Both the interfaces are shown below. interface IConnectionPointContainer : IUnknown { HRESULT EnumConnectionPoints( IEnumConnectionPoints **ppEnum) = 0; HRESULT FindConne
get depth data，Visual Displaythe sample program. An excerpt from the data acquisition phase of the introduction of the previous section. The full contents of this sample program，It's all public on the following GitHub. Https://github.com/UnaNancyOwen/Kinect2SampleFigure 2 Data acquisition process for Kinect SDK v2 Preview (re-send ) "sensor"Get "sensor"//Sensorikinectsensor* Psensor; ......1HRESULT HRESULT=S_ok;h
uses theOpenCV. the details of the OPENCV can be found in the following information. http://docs.opencv.org/ "sensor"Get "sensor" //Sensorikinectsensor* Psensor; ......1HRESULT HRESULT=S_ok;hresult= Getdefaultkinectsensor (psensor); ......2if(FAILED (HResult)) {Std::cerr"Error:getdefaultkinectsensor"Std::endl; return-1;}
server can be written in C + + and C # managed code. The C + + client registers an instance of a class that provides an implementation of the sink interface. A managed client registers a delegate for a single event, thus creating a single sink per event notification method, referring to the interop portions of C #.One, the connection point program writes1, use ATL to establish component programs.2, add ATL simple OBJECT, support connection point events.Note: If there is no current connection po
) 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 follows. H
pointer in the function pointer table. In macro language development, if the macro language may obtain the index of the pointer of the function in vtbl so that it can call them? When a macro language calls a function in the COM component, three types of information can be used: the proid, function name, and parameters passed to the function. The macro runtime system must provide a simple method to execute functions with the old name of the function. This method is the idispatch interface. 1.2id
Compile a transform filter to flip the image. In msdn, the "Writing transform filters" section lists the six basic steps for writing a transform filter. Follow these six steps one by one. 1. Select base class Derived from cbasefilter, three classes are used to compile the transform filter: ctransformfilter, ctransinplacefilter, and cvideotransformfilter. For the differences between the three base classes, see the description of msdn. We select the ctransformfilter class. After selecting the bas
using any type of interface pointer. If the initialization value is of the same type as CComQIPtr, the constructor simply calls AddRef of the pointer. However, if the type is different, it first calls the QueryInterface of the pointer to obtain the same type of interface pointer. When the QueryInterface fails, the internal pointer is set to NULL. All the following code can be used to check whether the conversion is successful: Void func (iunknown * punk) (2) Assignment When assigning values,
ultimately inherited from iunknown, while the Automation Object also includes idispatch. We will see its role in the DCOM section later. Iinterface = interface['{0000-0000-0000-c000-000000000046}']Function QueryInterface (const IID: tguid; out OBJ): hresult; stdcall;Function _ addref: integer; stdcall;Function _ release: integer; stdcall;End; Iunknown = iinterface; Idispatch = interface (iunknown)['{00020400-0000-0000-c000-000000000046}']Function get
in riid Hresult lockserver (bool flock );// Increments or decrements the lock count Lockserver is used to control the reference count of the class factory object. The system checks and changes the count to determine whether to uninstall the component, that is, to control the class factory's survival.Createinstance is the most important component. The only function of a class factory component is to create other components. A class factory component c
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