帮我注释一下buttonsj n + i = new Button; buttonsj n + iLocation = new PointstartPositionX + i sizes - 1 i startPositionY + j sizes - 1 j;

//创建一个按钮并设置它的位置、大小、TabIndex、背景颜色、样式和是否启用 buttons[j * n + i] = new Button(); buttons[j * n + i].Location = new Point(startPositionX + i * sizes - (1 * i), startPositionY + j * sizes - (1 * j)); buttons[j * n + i].Size = new Size(sizes, sizes); buttons[j * n + i].TabIndex = j * n + i; buttons[j * n + i].UseVisualStyleBackColor = true; buttons[j * n + i].FlatStyle = FlatStyle.Flat; buttons[j * n + i].Enabled = false; //将按钮添加到当前窗体的控件集合中 this.Controls.Add(buttons[j * n + i]);