c#调用c++dll共享内存需要函数

调用函数如下，都是项目中用到的函数，这样用到的时候不需要再照着msdn中c++函数一个一个的修改成c#支持的函数了。

[csharp]
//创建文件映射 
    [DllImport("kernel32.dll", EntryPoint = "CreateFileMapping", SetLastError = true, CharSet = CharSet.Ansi)] 
        public static extern IntPtr CreateFileMapping(int hFile, IntPtr lpAttribute, uint flProtected, uint dwMaximumSizeHigh, uint dwMaximumSizeLow, string lpName); 
    //打开文件映射对象 
        [DllImport("kernel32.dll", EntryPoint = "OpenFileMapping", SetLastError = true, CharSet = CharSet.Auto)] 
        private static extern IntPtr OpenFileMapping(uint dwDesiredAccess, bool bInheritHandle, String lpName); 
    //把文件数据映射到进程的地址空间 
        [DllImport("Kernel32.dll")] 
        private static extern IntPtr MapViewOfFile(IntPtr hFileMappingObject, uint dwDesiredAccess, uint dwFileOffsetHigh, uint dwFileOffsetLow, uint dwNumberOfBytesToMap); 
    //从调用线程的地址空间释放文件数据映像 
        [DllImport("Kernel32.dll", EntryPoint = "UnmapViewOfFile", SetLastError = true, CharSet = CharSet.Auto)] 
        private static extern bool UnmapViewOfFile(IntPtr lpBaseAddress); 
    //关闭一个已经打开的文件句柄 
        [DllImport("kernel32.dll", EntryPoint = "CloseHandle", SetLastError = true, CharSet = CharSet.Auto)] 
        private static extern bool CloseHandle(IntPtr hHandle); 
    //获取最后一个错误信息 
        [DllImport("kernel32.dll", EntryPoint = "GetLastError", SetLastError = true, CharSet = CharSet.Auto)] 
        private static extern uint GetLastError(); 
 
        //发送消息需要函数  www.zzzyk.com
        [DllImport("User32.dll", EntryPoint = "FindWindow", CharSet = CharSet.Ansi)] 
        public static extern IntPtr FindWindow(string lpClassName, string lpWindowName); 
 
        [DllImport("User32.dll", EntryPoint = "PostMessage", CharSet = CharSet.Ansi)] 
        public static extern bool PostMessage(IntPtr hWnd, uint Msg, uint wParam, uint lParam); 
    // 
        const int ERROR_ALREADY_EXISTS = 183; 
    //OpenFileMapping和MapViewOf函数中，使用的文件访问权限 
        const int FILE_MAP_COPY = 0x0001; 
        const int FILE_MAP_WRITE = 0x0002; 
        const int FILE_MAP_READ = 0x0004; 
        const int FILE_MAP_ALL_ACCESS = 0x0002 | 0x0004; 
    //CreateFileMapping函数中，文件映射时，保护属性 
        const int PAGE_READONLY = 0x02; 
        const int PAGE_READWRITE = 0x04; 
        const int PAGE_WRITECOPY = 0x08; 
        const int PAGE_EXECUTE = 0x10; 
        const int PAGE_EXECUTE_READ = 0x20; 
        const int PAGE_EXECUTE_READWRITE = 0x40; 
    // 
        const int INVALID_HANDLE_VALUE = -1; 

补充：软件开发 , C# ,

上一个：c#删除文件遇到问题
下一个：c#读写共享内存操作函数封装