web程序中怎么获取浏览器（360及ie）的窗口句柄

web程序中如何获取浏览器（360及ie）的窗口句柄
怎么获取浏览器的窗口句柄啊！请高手指导！
IntPtr ptr = FindWindow(null, "360.exe");
IntPtr ptr = FindWindow("IEFrame", null);
IntPtr ptr = FindWindow(null, "IEFrame");

都试过了，都返回0；
参数值传什么啊？

------解决方案--------------------------------------------------------
通过FindWindow获取IE，取值
[DllImport("User32.dll")]
static extern int FindWindow(string lpClassName, string lpWindowName);
[DllImport("User32.dll")]
static extern int FindWindowEx(int hwndParent, int hwndChildAfter, string lpszClass, string lpszWindow);

public static string GetURL()
{
IntPtr i= FindWindowA("IEFrame", null);
int child = FindWindowEx(parent, 0, "", null);
}

http://www.cnblogs.com/qiuyi21/articles/1302732