By default, the HotObject property is -1, which indicates no effect. The HotObject property retrieves or sets a value that indicates the index within current tab-skin, that changes its background while the cursor hovers the page. The HotBackColor property sets the background color for the page's caption while cursor hovers it.  The HotForeColor property sets the foreground color for the page's caption while cursor hovers it.

The HotBackColor property changes the background color of:

• page, if the HotObject property is -1 or points to a non-existing part of the skin-objects
• a particular object as indicates by the HotObject property (for instance you can show just a colored-line when the cursor hovers the page)

The HotBackColor property has no effect if:

• -1
• the HotObject property points to a non-existing part of the skin-objects

The following video shows how you can define the hot-colors for the control:

• play 

What you need is to:

• open the control's skin using "Edit tab" , "Edit Visual Design" (design-mode) or ExETB.exe WYSWYG tool
• insert a child-object to "Normal" page
• set the alignment, size and color for the newly inserted object
• collect and use its identifier into the HotObject property (the red circle shows the identifier you can use within the HotObject property)

as in the following screen shot: