Format for sending images to Azure OpenAI

Hi,

I logged into Azure OpenAI Studio and tried to send an image in the OpenAI chat. The image was successfully sent, and OpenAI provided a correct response based on the error message in the image.

While checking the backend code for sending the image to the OpenAI client, I couldn't find the exact format required for the image URL. What should be the format of image url. I have tried it out by sending as base 64 and i didnt get any proper response. 

 // Initialize the AzureOpenAIClient
    var azureClient = new AzureOpenAIClient(new Uri(endpoint), credential);  
    
    // Initialize the ChatClient with the specified deployment name
    ChatClient chatClient = azureClient.GetChatClient("gpt-4o");  
    
    // Create a list of chat messages
    var messages = new List<ChatMessage>  
    {  
        new UserChatMessage("

image_url

"),
              new AssistantChatMessage("The error message \"We couldn't upload your data. This request is not authorized to perform this operation\" indicates that you do not have the necessary permissions to upload files to the Azure Blob Storage. Here are steps you can follow to resolve this issue:

1. **Check Your Permissions**:
   - Ensure that you have the correct pe

Could you please confirm whether this functionality can also be used with the 'On Your Data' feature. If the text in the image is stored within documents in a specific index, can we use the image to retrieve relevant solutions from the index?