Use picture button controls to trigger an action, or to select between two different states. They differ from command buttons or toggle buttons in that on a picture button you can display a bitmap, instead of a label.
There are two styles of picture button control: picture command button (CTRL_PICTURE_COMMAND_BUTTON), and picture toggle button (CTRL_PICTURE_TOGGLE_BUTTON).
A sample picture button control appears in the following figure.
Picture Button Control
Operating Picture Button Controls
Programming Picture Button Controls
Picture Button Control Attributes