C#操作实例

C#实例菜单、视频监控 using System; using System.Collections.Generic; using System.Linq; using System.Runtime.InteropServices; using System.Text; namespace Ex13_09 { class VideoAPI { [DllImport("avicap32.dll")] public static extern IntPtr capCreateCaptureWindowA(byte[] lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, int nID); [DllImport("avicap32.dll")] public static extern bool capGetDriverDescriptionA(short wDriver, byte[] lpszName, int cbName, byte[] lpszVer, int cbVer); [DllImport("user32.dll")] public static extern bool SendMessage(IntPtr hWnd, int wMsg, bool wParam, int IParam); [DllImport("user32.dll")] public static extern bool SendMessage(IntPtr hWnd, int wMsg,short wParam, int IParam); // 常量 public const int WM_USER = 0x400; public const int WS_CHILD = 0x40000000; public const int WS_VISIBLE = 0x10000000; public const int SWP_NOMOVE = 0x2; public const int SWP_NOZORDER = 0x4; public const int WM_CAP_DRIVER_CONNECT = WM_USER + 10; public const int WM_CAP_DRIVER_DISCONNECT = WM_USER + 11; public const int WM_CAP_SET_CALLBACK_FRAME = WM_USER + 5; public const int WM_CAP_SET_PREVIEW = WM_USER + 50; public const int WM_CAP_SET_PREVIEWRATE = WM_USER + 52; public const int WM_CAP_SET_VIDEOFORMAT = WM_USER + 45; public const int WM_CAP_START = WM_USER; public const int WM_CAP_SAVEDIB = WM_CAP_START + 25; public const int WM_CAP_SEQUENCE = WM_CAP_START + 62; public const int WM_CAP_FILE_SET_CAPTURE_FILEA = WM_CAP_START + 20; public const int WM_CAP_STOP = WM_USER + 12; } }