Constants for identifying the image size of an icon between 5 sizes.
| bs20x20pix = | 0 | ' Image size 20x20 pixels. |
| bs24x24pix = | 1 | ' Image size 24x24 pixels. |
| bs30x30pix = | 2 | ' Image size 30x30 pixels. |
| bs36x36pix = | 3 | ' Image size 36x36 pixels. |
| bs44x44pix = | 4 | ' Image size 44x44 pixels. |