Help2.GetPrevTopic(String) Method

Reference

Definition

Namespace:: Microsoft.VisualStudio.VSHelp80

Assembly:: Microsoft.VisualStudio.VSHelp80.dll

Assembly:: Microsoft.VisualStudio.Interop.dll

Package:: Microsoft.VisualStudio.Interop v17.11.40262

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.

Given a URL returns the previous URL in the table of contents.

public:
 System::String ^ GetPrevTopic(System::String ^ bstrURL);

public:
 Platform::String ^ GetPrevTopic(Platform::String ^ bstrURL);

std::wstring GetPrevTopic(std::wstring const & bstrURL);

[System.Runtime.InteropServices.DispId(15)]
public string GetPrevTopic (string bstrURL);

[<System.Runtime.InteropServices.DispId(15)>]
abstract member GetPrevTopic : string -> string

Public Function GetPrevTopic (bstrURL As String) As String

Parameters

bstrURL: String

String containing the URL of the current topic that is compatible with Internet Explorer.

Returns

String

Returns a string containing the URL of the previous topic in the table of contents.

Implements

GetPrevTopic(String)

Attributes: DispIdAttribute

Examples

Create a Visual Studio add-in by using Visual C# as described in How to: Create an Add-In. Add references to Microsoft.VisualStudio.VSHelp, Microsoft.VisualStudio.VSHelp80, and System.Windows.Forms. Replace the code in the OnConnection method in the Connect.cs file with the following code. Run the code example as described in How to: Compile and Run the Automation Object Model Code Examples.

using System;  
using Extensibility;  
using EnvDTE;  
using EnvDTE80;  
using Microsoft.VisualStudio.VSHelp;  
using Microsoft.VisualStudio.VSHelp80;  
using System.Windows.Forms;  

public void OnConnection(object application,  
ext_ConnectMode connectMode, object addInInst, ref Array custom)  
{  
    _applicationObject = (DTE2)application;  
    _addInInstance = (AddIn)addInInst;  
    HelpGetPrevURLExample(_applicationObject);  
}  

public void HelpGetPrevURLExample(DTE2 dte)  
{  
    // Returns and displays the URL of the topic that precedes  
    // the topic specified  
    // by the URL in the table of contents.  
    try  
    {  
        Microsoft.VisualStudio.VSHelp80.Help2 help2 =  
(Microsoft.VisualStudio.VSHelp80.Help2)_applicationObject.GetObject ("Help2");  

        // Get the URL of the topic that precedes   
        // Introducing Visual Studio   
        // and display it.  
        MessageBox.Show("The previous URL before the supplied one is "   
+ "\n" + help2.GetPrevTopic  
("ms-help://MS.VSCC.v80/MS.MSDN.v80/MS.VisualStudio.v80.en  
/dv_vstoc/html/99997089-56ff-4d60-81a9-447062dc98ac.htm"));  

    }  
    catch (SystemException ex)  
    {  
        MessageBox.Show("ERROR: " + ex);  
    }  
}

Applies to

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