The lower 3 bytes of this 32 bit field are used to specify a custom foreground text color as a set of RGB values. Te low byte is the R (red) value, the second lowest byte is the G (green) value and the third lowest byte is the B(blue) value. The maximum for each field is 255. When all three are set to 255 (e.g. &h00FFFFFF) you get white; when all are set to 0 (e.g. &h00000000) you get black. However, to distinguish the latter case from the default (which is also &h00000000) you must set one of the bits in the upper byte to a non-zero value. For example, to set the text color to black, you might set txc'fcolor to &h10FFFFFF. (Since the default text color is black, this is not much of an issue, but the concept applies to all of the RGB-style color fields.)