IDebugQueryEngine2
Applies to: 
Visual Studio 
Visual Studio for Mac
Note
This article applies to Visual Studio 2017. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here
This interface lets the session debug manager (SDM) retrieve an interface that represents the debug engine (DE).
Syntax
IDebugQueryEngine2 : IUnknown
Notes for Implementers
The DE implements this interface on the objects that implement the most common DE interfaces (such as IDebugProgram2, IDebugThread2, and IDebugStackFrame2) in order to allow access to the IDebugEngine2 interface of the DE itself.
Notes for Callers
Call QueryInterface on a typical DE interface to obtain this interface.
Methods in Vtable Order
The following table shows the methods of IDebugQueryEngine2.
| Method | Description |
|---|---|
| GetEngineInterface | Gets a custom debug engine (DE) interface. |
Remarks
This interface is typically implemented in the object that implements the IDebugProgram2 interface in order to support causality-ordered stepping through functions; that is, when the debugger is stepping out of a function, the next function to execute may not be the previous function on the stack but a function in another thread altogether. For a definition of "causality," see the Visual Studio Debugger Glossary.
Requirements
Header: msdbg.h
Namespace: Microsoft.VisualStudio.Debugger.Interop
Assembly: Microsoft.VisualStudio.Debugger.Interop.dll