constants BackgroundPartEnum
The BackgroundPartEnum type indicates parts in the control. Use the Background property to specify a background color or a visual appearance for specific parts in the control. A Color expression that indicates the background color for a specified part. The last 7 bits in the high significant byte of the color to indicates the identifier of the skin being used. Use the Add method to add new skins to the control. If you need to remove the skin appearance from a part of the control you need to reset the last 7 bits in the high significant byte of the color being applied to the background's part.

If you refer a part of the scroll bar please notice the following:  


NameValueDescription
exHSplitterApp105 exHSplitterApp. Specifies the visual appearance for the horizontal split bar.
exVSplitterApp106 exVSplitterApp. Specifies the visual appearance for the vertical split bar.
exISplitterApp107 exISplitterApp. Specifies the visual appearance for the intersection between splitters.
exToolTipAppearance64 Specifies the visual appearance of the borders of the tooltips.
exToolTipBackColor65 Specifies the tooltip's background color.
exToolTipForeColor66 Specifies the tooltip's foreground color.
exContextMenuAppearance99 Specifies the visual appearance of the control's context menu.
exContextMenuBackColor100 Specifies the solid background color for the control's context menu.
exContextMenuForeColor101 Specifies the text foreground color for the control's context menu.
exContextMenuSelBackColor102 Specifies the solid/EBN selection's background color in the control's context menu.
exContextMenuSelBorderColor103 Specifies the solid color to show the selection in the control's context menu.
exContextMenuSelForeColor104 Specifies the selection's text foreground color in the control's context menu.
exToolBarAppearance162 Specifies the visual appearance / background color of the control's toolbar.
exToolBarPopupAppearance163 Specifies the visual appearance of the popups of the control's toolbar. This property requires a valid EBN color.
exToolBarLocalAppearance164 Specifies the visual appearance of the local popups of the control's toolbar. This property requires a valid EBN color.
exVSUp256 The up button (<) in normal state.
exVSUpP257 The up button (<) when it is pressed.
exVSUpD258 The up button (<) when it is disabled.
exVSUpH259 The up button (<) when the cursor hovers it.
exVSThumb260 The thumb part (exThumbPart) in normal state.
exVSThumbP261 The thumb part (exThumbPart) when it is pressed.
exVSThumbD262 The thumb part (exThumbPart) when it is disabled.
exVSThumbH263 The thumb part (exThumbPart) when cursor hovers it.
exVSDown264 The down button (>) in normal state.
exVSDownP265 The down button (>) when it is pressed.
exVSDownD266 The down button (>) when it is disabled.
exVSDownH267 The down button (>) when the cursor hovers it.
exVSLower268 The lower part ( exLowerBackPart ) in normal state.
exVSLowerP269 The lower part ( exLowerBackPart ) when it is pressed.
exVSLowerD270 The lower part ( exLowerBackPart ) when it is disabled.
exVSLowerH271 The lower part ( exLowerBackPart ) when the cursor hovers it.
exVSUpper272 The upper part ( exUpperBackPart ) in normal state.
exVSUpperP273 The upper part ( exUpperBackPart ) when it is pressed.
exVSUpperD274 The upper part ( exUpperBackPart ) when it is disabled.
exVSUpperH275 The upper part ( exUpperBackPart ) when the cursor hovers it.
exVSBack276 The background part ( exLowerBackPart and exUpperBackPart ) in normal state.
exVSBackP277 The background part ( exLowerBackPart and exUpperBackPart ) when it is pressed.
exVSBackD278 The background part ( exLowerBackPart and exUpperBackPart ) when it is disabled.
exVSBackH279 The background part ( exLowerBackPart and exUpperBackPart ) when the cursor hovers it.
exHSLeft384 The left button (<) in normal state.
exHSLeftP385 The left button (<) when it is pressed.
exHSLeftD386 The left button (<) when it is disabled.
exHSLeftH387 The left button (<) when the cursor hovers it.
exHSThumb388 The thumb part (exThumbPart) in normal state.
exHSThumbP389 The thumb part (exThumbPart) when it is pressed.
exHSThumbD390 The thumb part (exThumbPart) when it is disabled.
exHSThumbH391 The thumb part (exThumbPart) when the cursor hovers it.
exHSRight392 The right button (>) in normal state.
exHSRightP393 The right button (>) when it is pressed.
exHSRightD394 The right button (>) when it is disabled.
exHSRightH395 The right button (>) when the cursor hovers it.
exHSLower396 The lower part (exLowerBackPart) in normal state.
exHSLowerP397 The lower part (exLowerBackPart) when it is pressed.
exHSLowerD398 The lower part (exLowerBackPart) when it is disabled.
exHSLowerH399 The lower part (exLowerBackPart) when the cursor hovers it.
exHSUpper400 The upper part (exUpperBackPart) in normal state.
exHSUpperP401 The upper part (exUpperBackPart) when it is pressed.
exHSUpperD402 The upper part (exUpperBackPart) when it is disabled.
exHSUpperH403 The upper part (exUpperBackPart) when the cursor hovers it.
exHSBack404 The background part (exLowerBackPart and exUpperBackPart) in normal state.
exHSBackP405 The background part (exLowerBackPart and exUpperBackPart) when it is pressed.
exHSBackD406 The background part (exLowerBackPart and exUpperBackPart) when it is disabled.
exHSBackH407 The background part (exLowerBackPart and exUpperBackPart) when the cursor hovers it.
exSBtn324 All button parts ( L1-L5, <, exThumbPart, >, R1-R6 ), in normal state.
exSBtnP325 All button parts ( L1-L5, <, exThumbPart, >, R1-R6 ), when it is pressed.
exSBtnD326 All button parts ( L1-L5, <, exThumbPart, >, R1-R6 ), when it is disabled.
exSBtnH327 All button parts ( L1-L5, <, exThumbPart, >, R1-R6 ), when the cursor hovers it .
exScrollHoverAll500 Enables or disables the hover-all feature. By default (Background(exScrollHoverAll) = 0), the left/top, right/bottom and thumb parts of the control' scrollbars are displayed in hover state while the cursor hovers any part of the scroll bar (hover-all feature). The hover-all feature is available on Windows 11 or greater, if only left/top, right/bottom, thumb, lower and upper-background parts of the scrollbar are visible, no custom visual-appearance is applied to any visible part. The hover-all feature is always on If Background(exScrollHoverAll) = -1. The Background(exScrollHoverAll) = 1 disables the hover-all feature.
exVSThumbExt503 The thumb-extension part in normal state.
exVSThumbExtP504 The thumb-extension part when it is pressed.
exVSThumbExtD505 The thumb-extension part when it is disabled.
exVSThumbExtH506 The thumb-extension when the cursor hovers it.
exHSThumbExt507 The thumb-extension in normal state.
exHSThumbExtP508 The thumb-extension when it is pressed.
exHSThumbExtD509 The thumb-extension when it is disabled.
exHSThumbExtH510 The thumb-extension when the cursor hovers it.
exScrollSizeGrip511 Specifies the visual appearance of the control's size grip when both scrollbars are shown.