バージョン

BackColorAlpha プロパティ (AppearanceBase)

背景色に適用されるアルファレベル（不透明度）を指定します。
シンタックス
'宣言
 
Public MustOverride Property BackColorAlpha As Alpha
public abstract Alpha BackColorAlpha {get; set;}
使用例
Imports Infragistics.Win
		
  Private Sub SetupActiveCellAppearanceColors()

      Dim appearance As Appearance 

      appearance = New Infragistics.Win.Appearance()

      appearance.ForeColor = Color.White
      appearance.ForeColorDisabled = Color.Gray
      appearance.BackColor = Color.Green
      appearance.BackColor2 = Color.Blue
      appearance.BackColorDisabled = Color.Red
      appearance.BackColorDisabled2 = Color.Yellow
      appearance.BackGradientStyle = GradientStyle.Elliptical
      appearance.BackColorAlpha = Alpha.UseAlphaLevel
      appearance.AlphaLevel = 125

      Me.ultraGrid1.DisplayLayout.Override.CellAppearance = appearance

  End Sub
using Infragistics.Win;

	private void SetupActiveCellAppearanceColors()
	{

		Appearance appearance = new Appearance();

		appearance.ForeColor = Color.White ;
		appearance.ForeColorDisabled = Color.Gray ;
		appearance.BackColor = Color.Green ;
		appearance.BackColor2 = Color.Blue;
		appearance.BackColorDisabled = Color.Red;
		appearance.BackColorDisabled2 = Color.Yellow;
		appearance.BackGradientStyle = GradientStyle.Elliptical;
		appearance.BackColorAlpha = Alpha.UseAlphaLevel;
		appearance.AlphaLevel = 125;

		this.ultraGrid1.DisplayLayout.Override.CellAppearance  = appearance;

	}
参照