private static extern Boolean EnumChildWindows(int hWndParent, PChildCallBack lpEnumFunc, int lParam);
protected static extern Boolean EnumChildWindows(int hWndParent,PChildCallBack lpEnumFunc,int lParam);
public static extern bool EnumChildWindows(IntPtr hWndParent, PChildCallBack lpEnumFunc, int lParam);
private static extern Boolean EnumChildWindows(IntPtr hWndParent, PChildCallBack lpEnumFunc, IntPtr lParam);