Examples: HeaderFontStyle property (NotesViewColumn - LotusScript®)

This agent displays whether bold is set and whether italic is set.

Sub Initialize
  Dim session As New NotesSession
  Dim db As NotesDatabase
  Dim view As NotesView
  Dim vc As NotesViewColumn
  Set db = session.CurrentDatabase
  Set view = db.GetView("Categorized")
  Set vc = view.Columns(0)
  If (vc.HeaderFontStyle And VC_FONT_BOLD) = _
  VC_FONT_BOLD Then
    msg1$ = "Bold is set"
  Else
    msg1$ = "Bold is not set"
  End If
  If (vc.HeaderFontStyle And VC_FONT_ITALIC) = _
  VC_FONT_ITALIC Then
    msg2$ = "Italic is set"
  Else
    msg2$ = "Italic is not set"
  End If
  Messagebox msg1$ & Chr(13) & msg2$,, "Font styles"
End Sub

This agent toggles the font style between bold and italic.

Sub Initialize
  Dim session As New NotesSession
  Dim db As NotesDatabase
  Dim view As NotesView
  Dim vc As NotesViewColumn
  Set db = session.CurrentDatabase
  Set view = db.GetView("Categorized")
  Set vc = view.Columns(0)
  If vc.HeaderFontStyle = VC_FONT_BOLD Then
    vc.HeaderFontStyle = VC_FONT_ITALIC
  Else
    vc.HeaderFontStyle = VC_FONT_BOLD
  End If
  Messagebox vc.FontStyle,, "New font style"
End Sub

To set a style without disturbing the others, use a logical construct of the following form:
```
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))
```