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Tip of the Day
Language: VB7
Expertise: Intermediate
Jun 1, 2002

WEBINAR:

On-Demand

Application Security Testing: An Integral Part of DevOps


Setting the font size of the selected text of a RichTextBox

' Set the specified font size to the selection of a RichTextBox
' Example: SetFontSize(richTextBox1, 16)

Public Sub SetFontSize(ByVal rtb As RichTextBox, ByVal fontSize As Single)
    ' if the selection length is > 0, work char by char
    If rtb.SelectionLength > 0 Then
        Dim selStart As Integer = rtb.SelectionStart
        Dim selLength As Integer = rtb.SelectionLength
        Dim currFont As System.Drawing.Font

        Dim i As Integer
        For i = 0 To selLength - 1
            ' select 1 char
            rtb.Select(selStart + i, 1)
            ' get the current font
            currFont = rtb.SelectionFont
            ' create and assign to the char a new font 
            ' with the new style
            rtb.SelectionFont = New Font(currFont.FontFamily, fontSize, _
                currFont.Style)
        Next
        ' reselect the original selection
        rtb.Select(selStart, selLength)
    Else
        rtb.SelectionFont = New Font(rtb.SelectionFont.Name, fontSize, _
            rtb.SelectionFont.Style)
    End If
End Sub
Marco Bellinaso
 
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