private void backgroundColorToolStripMenuItem_Click(object sender, EventArgs e) { ColorDialog dlg = new ColorDialog(); if (dlg.ShowDialog() != DialogResult.OK) { return; } mRenderView.SetBackgroundColor(dlg.Color.R / 255.0f, dlg.Color.G / 255.0f, dlg.Color.B / 255.0f, 1); }