Tab controls
When the BoldSelectedText property is enabled, the label for a tab page becomes bold when the user selects the tab page. If this property is not enabled, the tab text of the selected tab page has the same appearance as the tab text of the other tab pages.
To enable the BoldSelectedText property:
Select the BoldSelectedText check box on the General page of the Tab control’s Properties view.
The BoldSelectedText property takes a boolean value. The following example specifies that labels on tab pages of the tab_1 control are bold when they are selected:
tab_1.BoldSelectedText = TRUE