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Hit Test Return Values

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This section lists the hit test code values that are returned in the pwHitTestCode parameter of the HitTestThemeBackground function. The code values returned depend on the hit test options specified in the dwOptions parameter of the HitTestThemeBackground function. For a list of the options, see Hit Test Options.

Return Values

The following table lists the hit test options and the corresponding return codes.

Option Return codes Description
HTTB_BACKGROUNDSEG HTBOTTOM Hit test succeeded in the bottom border segment.
HTBOTTOMLEFT Hit test succeeded in the bottom and left border intersection.
HTBOTTOMRIGHT Hit test succeeded in the bottom and right border intersection.
HTCLIENT Hit test succeeded in the middle background segment.
HTLEFT Hit test succeeded in the left border segment.
HTNOWHERE Hit test succeeded outside the control or on a transparent area.
HTRIGHT Hit test succeeded in the right border segment.
HTTOP Hit test succeeded in the top border segment.
HTTOPLEFT Hit test succeeded in top and left border intersection.
HTTOPRIGHT Hit test succeeded in the top and right border intersection.
HTTB_CAPTION HTCAPTION Hit test succeeded in the top, top left, or top right background segments.
HTNOWHERE Hit test succeeded outside the control or on a transparent area.
HTTB_FIXEDBORDER HTBORDER Hit test succeeded in any background segment except the middle background segment.
HTCLIENT Hit test succeeded in the middle background segment.
HTTB_RESIZINGBORDER HTBORDER Hit test failed in the middle background segment and resizing zones, but succeeded in a background border segment.
HTTB_RESIZINGBORDER_BOTTOM HTBOTTOM Hit test succeeded in the bottom border segment.
HTTB_RESIZINGBORDER_LEFT HTLEFT Hit test succeeded in the left border segment.
HTTB_RESIZINGBORDER_RIGHT HTRIGHT Hit test succeeded in the right border segment.
HTTB_RESIZINGBORDER_TOP HTTOP Hit test succeeded in the top border segment.