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COM Object

Every COM object needs an IUnknown interface. In fact, a COM object is a struct whose first member (or element) is a pointer to a IUnknown or IUnknown-derived vTable.
All COM objects are identified by a GUID: the CLSID (= class identifier). Some are additionally identified by ProgIds.

Creation of COM objects

PowerShell new-object -com …
VBA createObject
AutoHotKey comObjCreate(…)

PowerShell

With PowerShell, a COM object can be created like so 
PS C\> $comObj = new-object -comObject prog.id
After creating the object, its methods can be displayed 
PS C:\> $comObj | get-member -mem method
See also Creating COM Objects with PowerShell

VBA - Visual Basic for Applications

In VBA, a COM object can be created with createObject(…).

Autohotkey

In AutoHotKey, a COM object can be created with comObjCreate(…).

See also

COM
Every COM object belongs to exactly one apartment.
Machine readable Information about an object's methods or argument names can be stored in a type library.

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