vc.HeaderFontStyle = _
vc.HeaderFontStyle Or VC_FONT_BOLD
To set two styles without disturbing the others, use a logical construct of the following form:
vc.HeaderFontStyle = _
vc.HeaderFontStyle Or VC_FONT_BOLD Or VC_FONT_ITALIC
To unset a style without disturbing the others, use a logical construct of the following form:
vc.HeaderFontStyle = _
vc.HeaderFontStyle And (Not VC_FONT_BOLD)
To unset two styles without disturbing the others, use a logical construct of the following form:
vc.HeaderFontStyle = _
vc.HeaderFontStyle And (Not (VC_FONT_BOLD Or VC_FONT_ITALIC))