BeginNETBlock[] and EndNETBlock[] are equivalent to the NETBlock function, except that they work across a larger span than the evaluation of a single expression.
CreateCOMObject[str] creates a COM object specified by the string str.
EndNETBlock[] and a preceding BeginNETBlock are equivalent to the NETBlock function, except that they work across a larger span than the evaluation of a single expression.
GetActiveCOMObject[string] acquires an already-running COM object specified by string, which can be either a ProgID (such as "Excel.Application") or a CLSID (such as ...
GetComplexType[] returns the .NET type that is currently mapped to Mathematica Complex numbers.
GetNETException[] returns the .NET exception object that was thrown in the most recent call from Mathematica to .NET.
LoadedNETAssemblies[] returns a list of all the .NET assemblies that have been loaded into the current session.
LoadedNETObjects[] returns a list of all the .NET objects that have been loaded into the current session.
LoadedNETTypes[] returns a list of all the .NET types that have been loaded into the current session.
NETLink[] returns the MathLink LinkObject that is used to communicate with the .NET/Link .NET runtime.