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imagelistj1

An ImageList is a supporting control that is typically used by other controls, such as a ListView but is exposed as a component to developers. We can use this component in our applications when we are building our own controls such as a photo gallery or an image rotator control.  

An image list is a collection of images of the same size, each of which can be referred to by its index. Image lists are used to efficiently manage large sets of icons or bitmaps. All images in an image list are contained in a single, wide bitmap in screen device format. An image list can also include a monochrome bitmap that contains masks that are used to draw images transparently (icon style).

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The imagelist form field type provides a drop down list of image files in a specified directory. Only files with .png, .gif, .jpg, .bmp, .ico extensions are listed. If the field has a saved value this is selected when the page is first loaded. If not, the default value (if any) is selected.