選択範囲に透過色を使用するには、CellStyle.SelectionBackColorプロパティのColorでアルファ値を指定します。セルのコンテンツの文字色を選択色に反映するには、CellStyle.SelectionForeColorプロパティにCellStyle.ForeColorプロパティと同じ色を指定します。

[Visual Basic]

Imports GrapeCity.Win.MultiRow

Private _selectionBackColor As Color
Private _rowIndex As Integer
Private _cellIndex As Integer

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
　　GcMultiRow1.Template = Template.CreateGridTemplate(10)
　　GcMultiRow1.RowCount = 20

　　_selectionBackColor = GcMultiRow1.CurrentCell.Style.SelectionBackColor
　　_rowIndex = GcMultiRow1.CurrentCell.RowIndex
　　_cellIndex = GcMultiRow1.CurrentCell.CellIndex

　　GcMultiRow1.DefaultCellStyle.SelectionForeColor = GcMultiRow1.DefaultCellStyle.ForeColor
　　GcMultiRow1.DefaultCellStyle.SelectionBackColor = Color.FromArgb(75, 228, 228, 232)

　　GcMultiRow1(2, 2).Style.BackColor = Color.Red
　　GcMultiRow1(1, 1).Value = "Testing"
　　GcMultiRow1(1, 1).Style.ForeColor = Color.Red
　　GcMultiRow1(1, 1).Style.SelectionForeColor = Color.Red

　　SelectionActions.SelectAll.Execute(GcMultiRow1)
End Sub

Private Sub GcMultiRow1_CurrentCellChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles GcMultiRow1.CurrentCellChanged
　　Dim gcMultiRow As GcMultiRow = TryCast(sender, GcMultiRow)
　　gcMultiRow(_rowIndex, _cellIndex).Style.SelectionBackColor = _selectionBackColor

　　_selectionBackColor = gcMultiRow.CurrentCell.Style.SelectionBackColor
　　_rowIndex = gcMultiRow.CurrentCell.RowIndex
　　_cellIndex = gcMultiRow.CurrentCell.CellIndex

　　If gcMultiRow.CurrentCell.Style.BackColor = Color.Empty Then
　　　　gcMultiRow.CurrentCell.Style.SelectionBackColor = gcMultiRow.CurrentRow.BackColor
　　Else
　　　　gcMultiRow.CurrentCell.Style.SelectionBackColor = gcMultiRow.CurrentCell.Style.BackColor
　　End If
End Sub

[C#]

using GrapeCity.Win.MultiRow;

private Color _selectionBackColor;
private int _rowIndex;
private int _cellIndex;

private void Form1_Load(object sender, EventArgs e)
{
　　gcMultiRow1.Template = Template.CreateGridTemplate(10);
　　gcMultiRow1.RowCount = 20;
　　
　　_selectionBackColor = gcMultiRow1.CurrentCell.Style.SelectionBackColor;
　　_rowIndex = gcMultiRow1.CurrentCell.RowIndex;
　　_cellIndex = gcMultiRow1.CurrentCell.CellIndex;

　　gcMultiRow1.DefaultCellStyle.SelectionForeColor = gcMultiRow1.DefaultCellStyle.ForeColor;
　　gcMultiRow1.DefaultCellStyle.SelectionBackColor = Color.FromArgb(75, 228, 228, 232);

　　gcMultiRow1[2, 2].Style.BackColor = Color.Red;
　　gcMultiRow1[1, 1].Value = "Testing";
　　gcMultiRow1[1, 1].Style.ForeColor = Color.Red;
　　gcMultiRow1[1, 1].Style.SelectionForeColor = Color.Red;

　　gcMultiRow1.CurrentCellChanged += new EventHandler(gcMultiRow1_CurrentCellChanged);
　　
　　SelectionActions.SelectAll.Execute(gcMultiRow1);
}

private void gcMultiRow1_CurrentCellChanged(object sender, EventArgs e)
{
　　GcMultiRow gcMultiRow = sender as GcMultiRow;
　　gcMultiRow[_rowIndex, _cellIndex].Style.SelectionBackColor = _selectionBackColor;

　　_selectionBackColor = gcMultiRow.CurrentCell.Style.SelectionBackColor;
　　_rowIndex = gcMultiRow.CurrentCell.RowIndex;
　　_cellIndex = gcMultiRow.CurrentCell.CellIndex;

　　if (gcMultiRow.CurrentCell.Style.BackColor == Color.Empty)
　　　　gcMultiRow.CurrentCell.Style.SelectionBackColor = gcMultiRow.CurrentRow.BackColor;
　　else
　　　　gcMultiRow.CurrentCell.Style.SelectionBackColor = gcMultiRow.CurrentCell.Style.BackColor;
}