VCMidlTool.PreprocessorDefinitions Property

Reference

Definition

Namespace:: Microsoft.VisualStudio.VCProjectEngine

Assembly:: Microsoft.VisualStudio.VCProjectEngine.dll

Package:: Microsoft.VisualStudio.VCProjectEngine v17.11.40252

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets or sets one or more preprocessor defines.

public:
 property System::String ^ PreprocessorDefinitions { System::String ^ get(); void set(System::String ^ value); };

public:
 property Platform::String ^ PreprocessorDefinitions { Platform::String ^ get(); void set(Platform::String ^ value); };

[System.Runtime.InteropServices.DispId(2)]
public string PreprocessorDefinitions { [System.Runtime.InteropServices.DispId(2)] get; [System.Runtime.InteropServices.DispId(2)] set; }

[<System.Runtime.InteropServices.DispId(2)>]
[<get: System.Runtime.InteropServices.DispId(2)>]
[<set: System.Runtime.InteropServices.DispId(2)>]
member this.PreprocessorDefinitions : string with get, set

Public Property PreprocessorDefinitions As String

Property Value

String

One or more preprocessor defines.

Attributes: DispIdAttribute

Examples

See How to: Compile Example Code for Project Model Extensibility for information about how to compile and run this example.

The following example modifies the compiler's PreprocessorDefinitions property in the integrated development environment (IDE):

[Visual Basic]

' add reference to Microsoft.VisualStudio.VCProjectEngine  
Imports EnvDTE  
Imports Microsoft.VisualStudio.VCProjectEngine  

Public Module Module1  
    Sub Test()  
        Dim prj As VCProject  
        Dim cfgs, tools As IVCCollection  
        Dim cfg As VCConfiguration  
        Dim tool As VCCLCompilerTool  
        Dim oldDefs As String  
        prj = DTE.Solution.Projects.Item(1).Object  
        cfgs = prj.Configurations  
        cfg = cfgs.Item(1)  
        tool = cfg.Tools("VCCLCompilerTool")  
        oldDefs = tool.PreprocessorDefinitions  
        tool.PreprocessorDefinitions = "_TEST;" + oldDefs  
        MsgBox(tool.PreprocessorDefinitions)  
    End Sub  
End Module

Remarks

PreprocessorDefinitions exposes the functionality of the compiler's /D (Preprocessor Definitions) option, the MIDL compiler's MIDL Property Pages: General option, and the Resource Compiler's Resources Property Pages option.

Applies to

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