几个常用的API在c#中的定义
2010-06-25 19:22
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最近一个项目中用到的一些API,在解决一些实际的问题上(特别是和外部程序打交道)的时候还是蛮有用的。具体的参数什么的网上都有!
代码
代码
public class API { #region 窗口函数 [DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)] public static extern IntPtr FindWindow(string lpClassName, string lpWindowName); [DllImport("user32.dll", EntryPoint = "FindWindowEx", SetLastError = true)] public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow); [DllImport("user32.dll", EntryPoint = "SetForegroundWindow", SetLastError = true)] public static extern void SetForegroundWindow(IntPtr hwnd); [DllImport("user32.dll", EntryPoint = "GetWindow", SetLastError = true)] public static extern IntPtr GetWindow(IntPtr hWnd, uint wCmd); [DllImport("user32.dll", EntryPoint = "GetClassName", CharSet = CharSet.Unicode, SetLastError = true)] internal static extern int GetClassName(IntPtr hWnd, StringBuilder buf, int nMaxCount); [DllImport("user32.dll", EntryPoint = "SetWindowPos", CharSet = CharSet.Unicode, SetLastError = true)] public static extern bool SetWindowPos(IntPtr hWnd, int hwndinsertAfter, int x, int y, int cx, int cy, int wFlags); //显示窗体(包括使得窗体最小化,最大化等等操作) [DllImport("user32.dll ")] public static extern bool ShowWindow(IntPtr hwnd, int cmdshow); /// <summary> /// 设置窗体标题 /// </summary> /// <param name="hwnd">窗体句柄</param> /// <param name="lpStrjng">要设置的标题</param> /// <returns></returns> [DllImport("user32.dll ")] public static extern bool SetWindowText(IntPtr hwnd, string lpStrjng); /// <summary> /// 获得窗体的位置(相对于整个屏幕) /// </summary> /// <param name="hwnd">窗体句柄</param> /// <param name="rc">自定义的矩形结构,请调用该类中的RectangleEx</param> /// <returns></returns> [DllImport("user32.dll")] public static extern int GetWindowRect(IntPtr hwnd, ref RectangleEx rc); public struct RectangleEx { public int leftTopX; public int leftTopY; public int rightBottomX; public int rightBottomY; public int Width { get { return rightBottomX - leftTopX; } } public int Height { get { return rightBottomY - leftTopY; } } } /// <summary> /// 获得包含指定点的窗口的句柄 /// </summary> /// <param name="p">一个被检测的点的POINT结构</param> /// <returns></returns> [DllImport("user32.dll ")] public static extern IntPtr WindowFromPoint(Point p); /// <summary> /// 获得窗口文字 /// </summary> /// <param name="hWnd"></param> /// <param name="lpString">用来保存文字的stringBuilder</param> /// <param name="nMaxCount">stringBuilder的容量</param> /// <returns></returns> [DllImport("user32.dll")] public static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount); public delegate bool EnumWindowsProc(IntPtr hWnd, IntPtr lParam); /// <summary> /// 枚举所有控件 /// </summary> /// <param name="lpEnumFunc"></param> /// <param name="lParam"></param> /// <returns></returns> [DllImport("user32.dll")] public static extern int EnumWindows(EnumWindowsProc lpEnumFunc, IntPtr lParam); #endregion #region 消息函数 //发送消息的类型(第二个参数) public const int WM_KEYDOWN = 0X100; public const int WM_KEYUP = 0X101; public const int WM_CHAR = 0X102; /// <summary> /// 发送消息,等待返回 /// </summary> /// <param name="hWnd">窗体句柄</param> /// <param name="wMsg">被发送的消息类型(如键盘按下消息,字符消息等等)</param> /// <param name="wParam">附加的消息指定信息</param> /// <param name="lParam">附加的消息指定信息</param> /// <returns></returns> [DllImport("user32.dll", EntryPoint = "SendMessage", SetLastError = true, CharSet = CharSet.Unicode)] public static extern IntPtr SendMessage(IntPtr hWnd, int wMsg, int wParam, int lParam); [DllImport("user32.dll", EntryPoint = "PostMessage", SetLastError = true)] public static extern IntPtr PostMessage(IntPtr hWnd, int wMsg, int wParam, int lParam); #endregion #region 鼠标函数 [DllImport("user32.dll", EntryPoint = "SetCursorPos")] internal extern static int SetCursorPos(int x, int y); /// 使用范例: API.mouse_event(0x2 | 0x4, x,y, 0, 0); 在(x,y)处单击一下 public readonly int MOUSEEVENTF_LEFTDOWN = 0x2; public readonly int MOUSEEVENTF_LEFTUP = 0x4; [DllImport("user32.dll")] public static extern void mouse_event(int dwFlags, int dx, int dy, int dwData, int dwExtraInfo); #endregion #region 键盘函数 public static int KEYEVENTF_EXTENDEDKEY = 0x0001; public static int KEYEVENTF_KEYUP = 0x0002; public static byte VK_LWIN = 0x5B; [DllImport("user32.dll", EntryPoint = "keybd_event")] public static extern void keybd_event( byte bVk, byte bScan, int dwFlags, int dwExtraInfo ); #endregion #region 自绘函数 /// <summary> /// 获得窗口指定点处的句柄 /// </summary> /// <param name="hwnd">主窗体句柄</param> /// <param name="top">该点相对于主窗体上边框的距离</param> /// <param name="left">该点相对于主窗体左边框的距离</param> /// <returns></returns> public static IntPtr GetWinPartFromPoint(IntPtr hwnd, int top, int left) { RectangleEx r = new RectangleEx(); GetWindowRect(hwnd, ref r); //转化为整个屏幕的坐标 int topScreen = top + r.leftTopY; int leftScreen = left + r.leftTopX; return WindowFromPoint(new Point(topScreen, leftScreen)); } /// <summary> /// 到某处单击一下返回 /// </summary> /// <param name="ox">原来的鼠标地点x</param> /// <param name="oy"></param> /// <param name="x">目标地点x</param> /// <param name="y"></param> public static void ClickPosition(int ox,int oy,int x, int y) { SetCursorPos(x, y); mouse_event(0x2 | 0x4, x, y, 0, 0); SetCursorPos(ox, oy); } #endregion }
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