一个结构的几个参数的作用
[StructLayout(LayoutKind.Sequential)] public struct APPBARDATA { /// <summary> /// The size of the structure, in bytes. /// </summary> public int cbSize; /// <summary> /// The handle to the appbar window. /// </summary> public IntPtr hWnd; /// <summary> /// An application-defined message identifier. /// The application uses the specified identifier for notification messages /// that it sends to the appbar identified by the hWnd member. /// This member is used when sending the ABM_NEW message. /// </summary> public uint uCallbackMessage; /// <summary> /// A value that specifies an edge of the screen. /// This member is used when sending the ABM_GETAUTOHIDEBAR, ABM_QUERYPOS, ABM_SETAUTOHIDEBAR, and ABM_SETPOS messages. /// This member can be one of the following values /// ABE_BOTTOM Bottom edge /// ABE_LEFT Left edge /// ABE_RIGHT Right edge /// ABE_TOP Top edge. /// </summary> public uint uEdge; /// <summary> /// A RECT structure to contain the bounding rectangle, in screen coordinates, of an appbar or the Windows taskbar. /// This member is used when sending the ABM_GETTASKBARPOS, ABM_QUERYPOS, and ABM_SETPOS messages. /// </summary> public RECT rc; /// <summary> /// A message-dependent value. This member is used with the ABM_SETAUTOHIDEBAR and ABM_SETSTATE messages. /// </summary> public int lParam; }//<summary> / / /结构的大小，以字节为单位。 / / /</摘要> ///<summary> / / / appbar窗口的句柄。 / / /</摘要> ///<summary> // /一个应用程序定义的消息标识符。 / / /应用程序使用的通知消息指定的标识符 / / /它发送hWnd成员确定的appbar。 / / /此成员是使用时发送的ABM_NEW消息。 / / /</摘要> ///<summary> / / /一个值，指定在屏幕的边缘。 / / /此成员ABM_GETAUTOHIDEBAR，ABM_QUERYPOS，ABM_SETAUTOHIDEBAR，和ABM_SETPOS消息发送时使用。 / / /这个成员可以是下列值之一 / // ABE_BOTTOM底边 / / / ABE_LEFT左边缘 / / / ABE_RIGHT右边缘 / / / ABE_TOP顶边。 / / /</摘要> ///<summary> / / /一个RECT结构，包含在屏幕坐标的边界矩形，appbar或Windows任务栏上。 / / /时，该成员用来发送ABM_GETTASKBARPOS，ABM_QUERYPOS ABM_SETPOS消息。 / / /</摘要> ///<summary> / / /一个依赖于消息值。这个成员是用ABM_SETAUTOHIDEBAR ABM_SETSTATE消息。 / / /</摘要>