ulStyleValue (ULONG)

Style value at the current pel.

The style value is composed of an error value and a mask position, as follows:

┌───────────────┬───────────────┬───────────────┬───────────────┐
│high word      │3 bits         │5 bits         │8 bits         │
├───────────────┼───────────────┼───────────────┼───────────────┤
│not used       │not used       │mask pos       │error value    │
└───────────────┴───────────────┴───────────────┴───────────────┘