style[, t] = GetFormStyle()
style is set to a combination of the flags #ANTIALIAS, #SHADOW, and #BORDER.
See SetFormStyle for details.
If #SHADOW is set, GetFormStyle() also returns a table as the second return value which contains
the following fields:
ShadowColor:
ShadowSize:
ShadowDir:
If #BORDER is set, the return table will contain the following fields:
BorderColor:
BorderSize:See SetFormStyle for more information on form styles.