fs (ULONG)

Tracking options.

In alphabetic order:

TF_ALLINBOUNDARY

The default tracking is such that some part of the tracking rectangle is within the bounding rectangle defined by rclBoundary. This minimum size is defined by cxBorder and cyBorder.

If TF_ALLINBOUNDARY is specified, the tracking is performed so that no part of the tracking rectangle ever falls outside of the bounding rectangle.

TF_BOTTOM
Track the bottom side of the rectangle.
TF_GRID
Tracking is restricted to the grid defined by cxGrid and cyGrid.
TF_LEFT
Track the left side of the rectangle.
TF_MOVE
Track all sides of the rectangle.
TF_RIGHT
Track the right side of the rectangle.
TF_SETPOINTERPOS
The pointer is repositioned according to other flags as follows: none
Pointer is centered in the tracking rectangle.
TF_MOVE
Pointer is centered in the tracking rectangle.
TF_LEFT
Pointer is vertically centered at the left of the tracking rectangle.
TF_TOP
Pointer is horizontally centered at the top of the tracking rectangle.
TF_RIGHT
Pointer is vertically centered at the right of the tracking rectangle.
TF_BOTTOM
Pointer is horizontally centered at the bottom of the tracking rectangle.
TF_STANDARD
cx, cy, cxGrid, and cyGrid are all multiples of cxBorder and cyBorder.
TF_TOP
Track the top side of the rectangle.

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