cursor

• Read - only and static cursors are never updatable
  只读游标和静态游标永远无法更新。
• And leaves the cursor unchanged if no item is selected
  ，且光标形状不会发生变化。
• Gets the wait cursor , typically an hourglass shape
  获取等待光标，通常是沙漏形状。
• With the default cursor , you can scroll forward using
  对于默认光标，可以使用
• Cursors may be defined on queries using ctes
  可以使用cte在查询上定义游标。
• The queue at which the cursor is currently positioned
  游标当前所在的队列。
• Gets or sets the default cursor for the control
  获取或设置控件的默认光标。
• Cursors cannot be opened on waitfor statements
  不能对waitfor语句打开游标。
• Method to move the cursor forward to the first object
  方法将光标前移至第一个对象。
• Property if the cursor was changed in user code
  如果光标在用户代码中更改，将会引发