頁面載入，第二個選項卡不可用，頁面上進行操作後單擊按鈕才可跳轉到下一個選項卡，並且不可返回上一個選項卡（這是什麼需求我滴龜龜）

由於winform不自帶某個TabPage不可用的屬性，所以模擬了一下這個功能（客戶需求沒辦法）。

或者也可以假裝兩個按鈕再加上Panel的 

private void DlgRVTaskRun_Load(object sender, EventArgs e)
{
    //繪製選項卡
    tcContainer.DrawMode = TabDrawMode.OwnerDrawFixed;
    tcContainer.DrawItem += tcContainer_DrawItem;
}
/// <summary>
/// [儲存]按鈕單擊事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnSave_Click(object sender, EventArgs e)
{
    tcContainer.Tag = true;
    tcContainer.SelectedTab = tcContainer.TabPages[1];
}
/// <summary>
/// 選項卡[選擇]事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void tcContainer_Selecting(object sender, TabControlCancelEventArgs e)
{
    if ((tcContainer.SelectedTab.Name == tcContainer.TabPages[1].Name && !(tcContainer.Tag is bool)) || tcContainer.SelectedTab.Name == tcContainer.TabPages[0].Name )
    {
        e.Cancel = true;
    }
}

/// <summary>
/// 繪製選項卡
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void tcContainer_DrawItem(object sender, DrawItemEventArgs e)
{

    Rectangle recLeft = tcContainer.GetTabRect(0);
    Rectangle recRight = tcContainer.GetTabRect(1);
    //標籤背景填充顏色
    SolidBrush BackBrush = new SolidBrush(Color.LightGray);
    //標籤文字填充顏色
    SolidBrush FrontBrush = new SolidBrush(Color.Black);
    //設定文字對齊方式 
    StringFormat StringF = new StringFormat() { Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center };
    if (tcContainer.Tag is bool)
    {
        e.Graphics.FillRectangle(BackBrush, recLeft);
        e.Graphics.DrawString(tcContainer.TabPages[0].Text, new Font("微軟雅黑", 10.5F), FrontBrush, recLeft, StringF);
        e.Graphics.DrawString(tcContainer.TabPages[1].Text, new Font("微軟雅黑", 10.5F), FrontBrush, recRight, StringF);
    }
    else
    {               
        e.Graphics.FillRectangle(BackBrush, recRight);
        e.Graphics.DrawString(tcContainer.TabPages[0].Text, new Font("微軟雅黑", 10.5F), FrontBrush, recLeft, StringF);
        e.Graphics.DrawString(tcContainer.TabPages[1].Text, new Font("微軟雅黑", 10.5F), FrontBrush, recRight, StringF);
    }
}