using Azure.AI.OpenAI;
using DevExpress.AIIntegration;
using Microsoft.Extensions.AI;
using System.ClientModel;

internal static class Program {
    static string AzureOpenAIEndpoint { get { return "AZURE_OPENAI_ENDPOINT"; } }
    static string AzureOpenAIKey { get { return "AZURE_OPENAI_APIKEY"; } }
    static string DeploymentName { get { return "MODEL_NAME"; } } // For example, gpt-4.1.
    [STAThread]
    static void Main(){
        IChatClient client = new AzureOpenAIClient(
            new Uri(AzureOpenAIEndpoint),
            new ApiKeyCredential(AzureOpenAIKey))
                .GetChatClient(DeploymentName).AsIChatClient(); 
        AIExtensionsContainerDesktop.Default.RegisterChatClient(client);
        ApplicationConfiguration.Initialize();
        Application.Run(new Form1());
    }
}

Imports Azure.AI.OpenAI
Imports DevExpress.AIIntegration
Imports Microsoft.Extensions.AI
Imports System.ClientModel

Friend Module Program
    Private ReadOnly Property AzureOpenAIEndpoint() As String
        Get
            Return "AZURE_OPENAI_ENDPOINT"
        End Get
    End Property
    Private ReadOnly Property AzureOpenAIKey() As String
        Get
            Return "AZURE_OPENAI_APIKEY"
        End Get
    End Property
    Private ReadOnly Property DeploymentName() As String
        Get
            Return "MODEL_NAME"
        End Get
    End Property
        <STAThread>
        Sub Main()
        Dim client As IChatClient = (New AzureOpenAIClient(New Uri(AzureOpenAIEndpoint), New ApiKeyCredential(AzureOpenAIKey))).GetChatClient(DeploymentName).AsIChatClient()
        AIExtensionsContainerDesktop.Default.RegisterChatClient(client)
        ApplicationConfiguration.Initialize()
        Application.Run(New Form1())
        End Sub
End Module

using DevExpress.AIIntegration;
using DevExpress.AIIntegration.WinForms;
// ...
public partial class Form1 : Form {
    public Form1() {
        InitializeComponent();
            behaviorManager1.Attach<DocumentTranslateInlineBehavior>(documentViewer1, behavior => {
                behavior.Properties.Languages = new LanguageInfo[] {
                    new LanguageInfo("de-DE")
                };
            });
    }
}

Imports DevExpress.AIIntegration
Imports DevExpress.AIIntegration.WinForms
' ...
Partial Public Class Form1
    Inherits Form
    Public Sub New()
        InitializeComponent()
            behaviorManager1.Attach(Of DocumentTranslateInlineBehavior)(documentViewer1, Sub(behavior)
                behavior.Properties.Languages = New LanguageInfo() {
                    New LanguageInfo("de-DE")
                }
            End Sub)
    End Sub
End Class

internal static class Program {
    [STAThread]
    static void Main() {
        //...
        // The Initialize() method forcibly initializes the behavior manager in .NET Framework apps.
        DevExpress.AIIntegration.WinForms.Reporting.BehaviorInitializer.Initialize();
        Application.Run(new Form1());
    }
}