fxMultiplier (FIXED) - input
This parameter defines the size of the full arc in relation to an arc drawn with the current arc parameters. The multiplier is a fixed-point value. The high-order WORD contains the integer portion; the low-order WORD contains the fractional portion. A value of 64KB gives a multiplier of 1. There is an implementation limit of 255 for this value, which must not be negative.