C# - Show And Position An Image Initialized In The Codebehind On Page?

I have created a simple method to check if an image has been approved and finally returns it as an control. But how do i call and show it on the page? I've tried something like this in the aspx-file:

<% SendImage("DKBygMiniLogo.gif", "True"); %>

Here is the simple method:

protected Image SendImage(object Image, object Approved)
{
bool approved = Convert.ToBoolean(Approved);
Image img = new Image();
if (approved)
{
img.ImageUrl = "~/images/Ads/" + Image.ToString();
img.Visible = true;
}
else
{
img.ImageUrl = "~/images/Ads/" + Image.ToString();
img.Visible = false;
}
return img;
}

How do I actually show the image?