IDebugExpressionContext2
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 represents a context for expression evaluation.
Syntax
IDebugExpressionContext2 : IUnknown
Notes for Implementers
The debug engine (DE) implements this interface to represent a context in which an expression can be evaluated.
Notes for Callers
A call to GetExpressionContext returns the this interface. This interface is accessible only when the program being debugged has been paused and a stack frame is available.
Methods in Vtable Order
The following table shows the methods of IDebugExpressionContext2.
| Method | Description |
|---|---|
| GetName | Retrieves the name of the evaluation context. |
| ParseText | Parses a text-based expression for evaluation. |
Remarks
An evaluation context can be thought of as a scope for performing expression evaluation.
When a program has halted, the session debug manager (SDM) obtains a stack frame from the DE with a call to EnumFrameInfo. The SDM then calls GetExpressionContext to get the IDebugExpressionContext2 interface. This is followed by a call to ParseText to create an IDebugExpression2 interface, which represents the parsed expression ready to be evaluated.
Requirements
Header: msdbg.h
Namespace: Microsoft.VisualStudio.Debugger.Interop
Assembly: Microsoft.VisualStudio.Debugger.Interop.dll