--- title: "How to: Create Thumbnail Images" ms.date: "03/30/2017" dev_langs: - "csharp" - "vb" helpviewer_keywords: - "thumbnail images [Windows Forms], creating" - "images [Windows Forms], creating thumbnails" ms.assetid: e956242a-1e5b-4217-a3cf-5f3fb45d00ba --- # How to: Create Thumbnail Images A thumbnail image is a small version of an image. You can create a thumbnail image by calling the method of an object. ## Example The following example constructs an object from a JPG file. The original image has a width of 640 pixels and a height of 479 pixels. The code creates a thumbnail image that has a width of 100 pixels and a height of 100 pixels. The following illustration shows the thumbnail image: ![Screenshot that shows the output thumbnail.](./media/how-to-create-thumbnail-images/construct-thumbnail-image.png) > [!NOTE] > In this example, a callback method is declared, but never used. This supports all versions of GDI+. [!code-csharp[System.Drawing.WorkingWithImages#71](~/samples/snippets/csharp/VS_Snippets_Winforms/System.Drawing.WorkingWithImages/CS/Class1.cs#71)] [!code-vb[System.Drawing.WorkingWithImages#71](~/samples/snippets/visualbasic/VS_Snippets_Winforms/System.Drawing.WorkingWithImages/VB/Class1.vb#71)] ## Compiling the Code The preceding example is designed for use with Windows Forms, and it requires `e`, which is a parameter of the event handler. To run the example, follow these steps: 1. Create a new Windows Forms application. 2. Add the example code to the form. 3. Create a handler for the form's event 4. In the handler, call the `GetThumbnail` method and pass `e` for . 5. Find an image file that you want to make a thumbnail of. 6. In the `GetThumbnail` method, specify the path and file name to your image. 7. Press F5 to run the example. A 100 by 100 thumbnail image appears on the form. ## See also - [Images, Bitmaps, and Metafiles](images-bitmaps-and-metafiles.md) - [Working with Images, Bitmaps, Icons, and Metafiles](working-with-images-bitmaps-icons-and-metafiles.md)