Some lines and curves can be drawn either by the presentation driver or by simulations that must be able to query and set the style as required. If COM_TRANSFORM is not set, the coordinate pair at pptlXY is returned in screen coordinates.

The high-order WORD of the style number contains the first/last pel information. If the value of this byte is 0, the first pel is not drawn. (See First and Last Pel Considerations.) The low-order byte indicates the position in the style mask. This is a count, held in the three least significant bits, of the number of positions that the style mask byte is rotated. The next byte is the state of the style error value.