Functions (COM)

The following functions are provided by COM.

Function	Description
BindMoniker	Locates an object by means of its moniker, activates the object if it is inactive, and retrieves a pointer to the specified interface on that object.
CLSIDFromProgID	Looks up a CLSID in the registry, given a ProgID.
CLSIDFromProgIDEx	Triggers automatic installation if the COMClassStore policy is enabled.
CLSIDFromString	Converts a string generated by the StringFromCLSID function back into the original CLSID.
CoAddRefServerProcess	Increments a global per-process reference count.
CoAllowSetForegroundWindow	Enables the COM server process called to take focus away from the client application by using the IForegroundTransfer interface.
CoAllowUnmarshalerCLSID	Adds an unmarshaler CLSID to the allowed list for the calling process only.
CoCancelCall	Requests cancellation of an outbound DCOM method call pending on a specified thread.
CoCopyProxy	Makes a private copy of the specified proxy.
CoCreateFreeThreadedMarshaler	Creates an aggregatable object capable of context-dependent marshaling.
CoCreateGuid	Creates a GUID, a unique 128-bit integer used for CLSIDs and interface identifiers.
CoCreateInstance	Creates a single uninitialized object of the class associated with a specified CLSID.
CoCreateInstanceEx	Creates an instance of a specific class on a specific computer.
CoCreateInstanceFromApp	Creates an instance of a specific class on a specific computer from within an app container.
CoDisableCallCancellation	Undoes the action of a call to CoEnableCallCancellation.
CoDisconnectContext	Disconnects all proxy connections that are being maintained on behalf of all interface pointers that point to objects in the current context.
CoDisconnectObject	Disconnects all remote process connections being maintained on behalf of all the interface pointers that point to a specified object.
CoDosDateTimeToFileTime	Converts the MS-DOS representation of the time and date to a FILETIME structure used by Windows.
CoEnableCallCancellation	Enables cancellation of synchronous calls on the calling thread.
CoFileTimeNow	Returns the current time as a FILETIME structure.
CoFileTimeToDosDateTime	Converts a FILETIME into MS-DOS date and time values.
CoFreeAllLibraries	Frees all the DLLs that have been loaded with the CoLoadLibrary function (called internally by CoGetClassObject), regardless of whether they are currently in use.
CoFreeLibrary	Frees a library that, when loaded, was specified to be freed explicitly.
CoFreeUnusedLibraries	Unloads any DLLs that are no longer in use.
CoFreeUnusedLibrariesEx	Unloads any DLLs that are no longer in use and whose unload delay has expired.
CoGetApartmentType	Queries the current apartment type and type qualifier.
CoGetCallContext	Retrieves the context of the current call on the current thread.
CoGetCallerTID	Returns a pointer to a DWORD that contains the apartment ID of the caller's thread.
CoGetCancelObject	Obtains a pointer to a call control interface, normally ICancelMethodCalls, on the cancel object corresponding to an outbound COM method call pending on the same or another client thread.
CoGetClassObject	Provides a pointer to an interface on a class object associated with a specified CLSID.
CoGetContextToken	Returns a pointer to an implementation of IObjContext for the current context.
CoGetCurrentLogicalThreadId	Returns the logical thread id of the current physical thread.
CoGetCurrentProcess	Returns a value that is unique to the current thread. CoGetCurrentProcess can be used to avoid thread ID reuse problems.
CoGetInstanceFromFile	Creates a new object and initializes it from a file using IPersistFile::Load.
CoGetInstanceFromIStorage	Creates a new object and initializes it from a storage object through an internal call to IPersistFile::Load.
CoGetInterceptor	Instantiates the appropriate interceptor for the indicated interface to be intercepted and returns the newly created interceptor.
CoGetInterfaceAndReleaseStream	Unmarshals a buffer containing an interface pointer and releases the stream when an interface pointer has been marshaled from another thread to the calling thread.
CoGetMalloc	Retrieves a pointer to the default OLE task memory allocator (which supports the system implementation of the IMalloc interface) so applications can call its methods to manage memory.
CoGetMarshalSizeMax	Returns an upper bound on the number of bytes needed to marshal the specified interface pointer to the specified object.
CoGetObject	Converts a display name into a moniker that identifies the object named, and then binds to the object identified by the moniker.
CoGetObjectContext	Returns the context for the current object.
CoGetPSClsid	Returns the CLSID of the DLL that implements the proxy and stub for the specified interface.
CoGetStandardMarshal	Creates a default, or standard, marshaling object in either the client process or the server process, depending on the caller, and returns a pointer to that object's IMarshal implementation.
CoGetStdMarshalEx	Creates an aggregated standard marshaler for use with lightweight client-side handlers.
CoGetSystemSecurityPermissions	Returns the default values of the Security Descriptors of the machine-wide launch and access permissions, as well as launch and access limits.
CoGetTreatAsClass	Returns the CLSID of an object that can emulate the specified object.
CoHandlePriorityEventsFromMessagePump	Provides an opportunity for short-running infrastructural COM calls and other high-priority or short-running COM work to be dispatched between messages.
CoImpersonateClient	Enables the server to impersonate the client of the current call for the duration of the call.
CoInitialize	Initializes the COM library on the current thread and identifies the concurrency model as single-thread apartment (STA).
CoInitializeEx	Initializes the COM library for use by the calling thread, sets the thread's concurrency model, and creates a new apartment for the thread if one is required.
CoInitializeSecurity	Registers security and sets the default security values for the process.
CoInstall	Installs the requested COM server application.
CoInvalidateRemoteMachineBindings	Tells the service control manager to flush any cached RPC binding handles for the specified computer.
CoIsHandlerConnected	Determines whether a remote object is connected to the corresponding in-process object.
CoIsOle1Class	Determines whether the specified CLSID represents an OLE 1 object.
CoLoadLibrary	Loads a specific DLL into the caller's process.
CoLockObjectExternal	Called either to lock an object to ensure that it stays in memory, or to release such a lock.
CoMarshalHresult	Marshals an HRESULT to the specified stream, from which it can be unmarshaled using the CoUnmarshalHresult function.
CoMarshalInterface	Writes into a stream the data required to initialize a proxy object in some client process.
CoMarshalInterThreadInterfaceInStream	Marshals an interface pointer from one thread to another thread in the same process.
CoQueryAuthenticationServices	Retrieves a list of the authentication services registered when the process called CoInitializeSecurity.
CoQueryClientBlanket	Called by the server to find out about the client that invoked the method executing on the current thread.
CoRegisterActivationFilter	Registers a process-wide filter to process activation requests.
CoRegisterChannelHook	Registers a channel hook.
CoQueryProxyBlanket	Retrieves the authentication information the client uses to make calls on the specified proxy.
CoRegisterClassObject	Registers an EXE class object with OLE so other applications can connect to it.
CoRegisterInitializeSpy	Registers an implementation of the IInitializeSpy interface. The IInitializeSpy interface is defied to allow developers to perform initialization and cleanup on COM apartments.
CoRegisterMallocSpy	Registers an implementation of the IMallocSpy interface, thereafter requiring OLE to call its wrapper methods around every call to the corresponding IMalloc method.
CoRegisterMessageFilter	Registers with OLE the instance of an IMessageFilter interface, which is to be used for handling concurrency issues on the current thread.
CoRegisterPSClsid	Enables a downloaded DLL to register its custom interfaces within its running process so that the marshaling code will be able to marshal those interfaces.
CoRegisterSurrogate	Registers the surrogate process through its ISurrogate interface pointer.
CoReleaseMarshalData	Destroys a previously marshaled data packet.
CoReleaseServerProcess	Decrements the global per-process reference count.
CoResumeClassObjects	Called by a server that can register multiple class objects to inform the SCM about all registered classes, and permits activation requests for those class objects.
CoRevertToSelf	Restores the authentication information on a thread of execution.
CoRevokeClassObject	Informs OLE that a class object, previously registered with the CoRegisterClassObject function, is no longer available for use.
CoRevokeInitializeSpy	Revokes a registered implementation of the IInitializeSpy interface.
CoRevokeMallocSpy	Revokes a registered IMallocSpy object.
CoSetCancelObject	Sets (registers) or resets (unregisters) a cancel object for use during subsequent cancel operations on the current thread.
CoSetMessageDispatcher	Registers or unregisters the per-thread message dispatcher that is to be invoked when there are window messages available to dispatch within COM wait APIs on an ASTA thread.
CoSetProxyBlanket	Sets the authentication information that will be used to make calls on the specified proxy.
CoSuspendClassObjects	Prevents any new activation requests from the SCM on all class objects registered within the process.
CoSwitchCallContext	Switches the call context object used by CoGetCallContext.
CoTaskMemAlloc	Allocates a block of task memory in the same way that IMalloc::Alloc does.
CoTaskMemFree	Frees a block of task memory previously allocated through a call to the CoTaskMemAlloc or CoTaskMemRealloc function.
CoTaskMemRealloc	Changes the size of a previously allocated block of task memory.
CoTestCancel	Determines whether the call being executed on the server has been canceled by the client.
CoTreatAsClass	Establishes or removes an emulation, in which objects of one class are treated as objects of a different class.
CoUninitialize	Closes the COM library on the current thread, unloads all DLLs loaded by the thread, frees any other resources that the thread maintains, and forces all RPC connections on the thread to close.
CoUnmarshalHresult	Unmarshals an HRESULT type from the specified stream.
CoUnmarshalInterface	Initializes a newly created proxy using data written into the stream by a previous call to the CoMarshalInterface function, and returns an interface pointer to that proxy.
CoWaitForMultipleHandles	Waits for specified handles to be signaled or for a specified timeout period to elapse.
CoWaitForMultipleObjects	A replacement for CoWaitForMultipleHandles primarily intended for use by Windows Store apps and components. This replacement API hides the options for CoWaitForMultipleHandles that are not supported in ASTA.
CreateAntiMoniker	Creates and returns a new anti-moniker.
CreateAsyncBindCtx	Creates an asynchronous bind context for use with asynchronous monikers.
CreateBindCtx	Returns a pointer to an implementation of IBindCtx (a bind context object). This object stores information about a particular moniker-binding operation.
CreateClassMoniker	Creates a class moniker that refers to the specified class.
CreateFileMoniker	Creates a file moniker based on the specified path.
CreateGenericComposite	Performs a generic composition of two monikers and supplies a pointer to the resulting composite moniker.
CreateItemMoniker	Creates an item moniker that identifies an object within a containing object (typically a compound document).
CreateObjrefMoniker	Creates an OBJREF moniker based on a pointer to an object.
CreatePointerMoniker	Creates a pointer moniker based on a pointer to an object.
DllCanUnloadNow	Determines whether the DLL that implements this function is in use. If not, the caller can unload the DLL from memory.
DllDebugObjectRPCHook	Exported by DLLs to enable remote debugging.
DllGetClassObject	Retrieves the class object from a DLL object handler or object application.
DllRegisterServer	Instructs an in-process server to create its registry entries for all classes supported in this server module.
DllUnregisterServer	Instructs an in-process server to remove only those entries created through DllRegisterServer.
GetClassFile	Returns the CLSID associated with the specified filename.
GetRunningObjectTable	Returns a pointer to the IRunningObjectTable interface on the local running object table (ROT).
IIDFromString	Converts a string generated by the StringFromIID function back into the original interface identifier (IID).
Initialize	Initializes a thread to use Windows Runtime APIs.
IsAccelerator	Determines whether the specified keystroke maps to an accelerator in the specified accelerator table.
IsEqualCLSID	Determines whether two CLSIDs are equal.
IsEqualGUID	Determines whether two GUIDs are equal.
IsEqualIID	Determines whether two interface identifiers are equal.
MkParseDisplayName	Converts a string into a moniker that identifies the object named by the string.
MonikerCommonPrefixWith	Creates a new moniker based on the common prefix that this moniker (the one comprising the data of this moniker object) shares with another moniker.
MonikerRelativePathTo	Provides a moniker that, when composed onto the end of the first specified moniker (or one with a similar structure), yields the second specified moniker.
OleDoAutoConvert	Automatically converts an object to a new class if automatic conversion for that object class is set in the registry.
OleGetAutoConvert	Determines whether the registry is set for objects of a specified CLSID to be automatically converted to another CLSID, and if so, retrieves the new CLSID.
OleGetIconOfClass	Returns a handle to a metafile containing an icon and a string label for the specified CLSID.
OleGetIconOfFile	Returns a handle to a metafile containing an icon and string label for the specified file name.
OleIconToCursor	Converts an icon to a cursor.
OleRegGetMiscStatus	Returns miscellaneous information about the presentation and behaviors supported by the specified CLSID from the registry.
OleRegGetUserType	Gets the user type of the specified class from the registry.
OleSetAutoConvert	Specifies a CLSID for automatic conversion to a different class when an object of that class is loaded.
ProgIDFromCLSID	Retrieves the ProgID for a given CLSID.
StringFromCLSID	Converts a CLSID into a string of printable characters. Different CLSIDs always convert to different strings.
StringFromGUID2	Converts a globally unique identifier (GUID) into a string of printable characters.
StringFromIID	Converts an interface identifier into a string of printable characters.