constants ScrollPartEnum
The ScrollPartEnum type defines the parts in the control's scrollbar.

NameValueDescription
exLeftB1Part32768 (L1) The first additional button, in the left or top area. By default, this button is hidden. 
exLeftB2Part16384 (L2) The second additional button, in the left or top area. By default, this button is hidden. 
exLeftB3Part8192 (L3) The third additional button, in the left or top area. By default, this button is hidden.
exLeftB4Part4096 (L4) The forth additional button, in the left or top area. By default, this button is hidden.
exLeftB5Part2048 (L5) The fifth additional button, in the left or top area. By default, this button is hidden.
exLeftBPart1024 (<) The left or top button. By default, this button is visible. 
exLowerBackPart512 The area between the left/top button and the thumb. By default, this part is visible.
exThumbPart256 The thumb part or the scroll box region. By default, the thumb is visible.
exUpperBackPart128 The area between the thumb and the right/bottom button. By default, this part is visible.
exBackgroundPart640 The union between the exLowerBackPart and the exUpperBackPart parts. By default, this part is visible.
exRightBPart64 (>) The right or down button. By default, this button is visible. 
exRightB1Part32 (R1) The first additional button in the right or down side. By default, this button is hidden. 
exRightB2Part16 (R2) The second additional button in the right or down side. By default, this button is hidden. 
exRightB3Part8 (R3) The third additional button in the right or down side. By default, this button is hidden. 
exRightB4Part4 (R4) The forth additional button in the right or down side. By default, this button is hidden
exRightB5Part2 (R5) The fifth additional button in the right or down side. By default, this button is hidden. 
exRightB6Part1 (R6) The sixth additional button in the right or down side. By default, this button is hidden.
exPartNone0 No part.