Windows API的部分说明

/// <summary>
/// The FindWindow API
/// </summary>
/// <param name="lpClassName">the class name for the window to search for</param>
/// <param name="lpWindowName">指向一个指定了窗口名（窗口标题）的空结束字符串。
/// 如果该参数为空，则为所有窗口全匹配。</param>
/// <returns>如果函数成功，返回值为具有指定类名和窗口名的窗口句柄；如果函数失败，返回值为NULL</returns>
[DllImport("User32.dll", CharSet = CharSet.Auto, EntryPoint = "FindWindow", SetLastError = true)]
public static extern IntPtr FindWindow(String lpClassName, String lpWindowName);

/// <summary>
/// 查找窗体
/// </summary>
/// <param name="hwndParent"></param>
/// <param name="hwndChildAfter"></param>
/// <param name="lpszClass"></param>
/// <param name="lpszWindow"></param>
/// <returns></returns>
[DllImport("user32.dll", EntryPoint = "FindWindowEx", SetLastError = true)]
public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);

/// <summary>
/// 显示窗体
/// </summary>
/// <param name="hWnd">窗体句柄</param>
/// <param name="nCmdShow">是否显示</param>
/// <returns></returns>
[DllImport("user32.dll", EntryPoint = "ShowWindow", SetLastError = true)]
public static extern bool ShowWindow(IntPtr hWnd, uint nCmdShow);

/// <summary>
/// 获取鼠标位置
/// </summary>
/// <param name="lpPoint"></param>
/// <returns></returns>
[DllImport("user32.dll")]
public static extern bool GetCursorPos(ref Point lpPoint);

/// <summary>
/// 向Handle发送消息
/// </summary>
/// <param name="hwnd"></param>
/// <param name="msg"></param>
/// <param name="wParam"></param>
/// <param name="lParam"></param>
[DllImport("user32.dll")]
public static extern bool SendMessage(IntPtr hwnd, uint msg, object wParam, object lParam);

/// <summary>
/// 激活显示窗体
/// </summary>
/// <param name="hWnd"></param>
/// <returns></returns>
[DllImport("user32.dll", EntryPoint = "SetForegroundWindow")]
public static extern bool SetForegroundWindow(IntPtr hWnd);