Control-Data
Pointer to class-specific control data, beginning with a value conforming to a USHORT data type, which specifies the overall length of the data.
There are several different types of control-data structures:
- BTNCDATA
- Button control data
- ENTRYFDATA
- Entry field control data
- FRAMECDATA
- Frame control data
- MLECTLDATA
- Multi-line entry field control data
- SBCDATA
- Scroll bar control data.