Applications can use the following system values to create and add control scroll bars:

SV_CXVSCROLL

Width of the vertical scroll-bar.
SV_CYHSCROLL
Height of the horizontal scroll-bar.
SV_CYVSCROLLARROW
Height of the vertical scroll-bar arrow bit maps.
SV_CXHSCROLLARROW
Height of the vertical scroll-bar arrow bit maps.
SV_FIRSTSCROLLRATE
The delay (in milliseconds) before autoscrolling starts, when using a scroll bar.
SV_SCROLLRATE
The delay (in milliseconds) between scroll operations, when using a scroll bar.
SYSCLR_SCROLLBAR
Color for drawing scroll-bar backgrounds.
TID_SCROLL
Timer ID for a reserved scrolling time. This is used for sending notification messages when a scroll-arrow or scroll-bar background is selected.

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