带这样中括号的啥意思
[DllImport("user32")]
private static extern int SetWindowPos(int hwnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags);
[DllImport("avicap32.dll")]
private static extern int capCreateCaptureWindowA(string lpszWindowName, int dwStyle, int x, int y, int nWidth, short nHeight, int hWndParent, int nID);
这上面两个啥意思,怎么带个中括号,还有下面的方法怎么只有方法名?希望知道的能给我个详细解说!