The following functions are provided by COM.
| Function | Description |
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| 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.
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| 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. |
| 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.
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| 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. |
| 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.
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| 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.
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| 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.
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| 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.
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| CoGetStdMarshalEx | Creates an aggregated standard marshaler for use with lightweight client-side handlers.
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| CoGetTreatAsClass | Returns the CLSID of an object that can emulate the specified object.
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| CoImpersonateClient | Enables the server to impersonate the client of the current call for the duration of the call.
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| 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.
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| 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.
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| 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.
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| CoQueryAuthenticationServices | Retrieves a list of the authentication services registered when the process called CoInitializeSecurity.
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| CoQueryClientBlanket | Called by the server to find out about the client that invoked the method executing on the current thread. |
| 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.
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| 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.
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| 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.
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| CoSetCancelObject | Sets (registers) or resets (unregisters) a cancel object for use during subsequent cancel operations on the current 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.
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| 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. |
| 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. |
| 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.
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| 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). |
| IsAccelerator | Determines whether the specified keystroke maps to an accelerator in the specified accelerator table. |
| IsEqualCLSID | Determines whether two CLSIDs are equal.
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| IsEqualGUID | Determines whether two GUIDs are equal.
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| IsEqualIID | Determines whether two interface identifiers are equal.
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| 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.
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| OleGetIconOfFile | Returns a handle to a metafile containing an icon and string label for the specified file name.
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| 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.
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| ProgIDFromCLSID | Retrieves the ProgID for a given CLSID.
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| StringFromCLSID | Converts a CLSID into a string of printable characters. Different CLSIDs always convert to different strings.
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| StringFromGUID2 | Converts a globally unique identifier (GUID) into a string of printable characters.
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| StringFromIID | Converts an interface identifier into a string of printable characters. |