主题：如何 更改label 字体样式

不能。

Dim Label1 As WinForm.Label = e.Form.Controls("Label1")
Dim font As New Windows.forms.FontDialog
If font.showdialog = DialogResult.OK Then
    Label1.Font = font.font
End If

Dim color As New Windows.forms.ColorDialog
If color.showdialog = DialogResult.OK Then
    Label1.ForeColor = color.Color
End If