BCGControlBar Pro for MFC
void CBCGPEditCtrl::SetHighlightOutlineBlocks ( BOOL  bSet = TRUE)

Specifies whether the outline block highlighting is enabled.

Call method to enable or disable the outline block highlighting. When this feature is enabled and the user hovers the mouse cursor over the outline button or bar, the text inside the block is highlighted.

Parameters
bSetTRUE - enable the outline block highlighting; FALSE - disable