button-black-border

Arguments: multi-picture-button

Returns (or sets with setf) the value of the button-black-border property of multi-picture-button. This value determines whether a thin black border is drawn around each button of the control.

The black border is independent of the button-3d-border, which is drawn inside the black border if both are specified. The borders are drawn around the padding of each button but not around the spacing between the buttons.

button-black-border is a property of the multi-picture-button class.

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Created 2019.8.20.