以下是获取该信息的方法：

IntPtr MyHwnd = FindWindow(null, "Directory");
    var t = Type.GetTypeFromProgID("Shell.Application");
    dynamic o = Activator.CreateInstance(t);
    try
    {
        var ws = o.Windows();
        for (int i = 0; i < ws.Count; i++)
        {
            var ie = ws.Item(i);
            if (ie == null || ie.hwnd != (long)MyHwnd) continue;
            var path = System.IO.Path.GetFileName((string)ie.FullName);
            if (path.ToLower() == "explorer.exe")
            {
                var explorepath = ie.document.focuseditem.path;
            }
        }
    }
    finally
    {
        Marshal.FinalReleaseComObject(o);
    }

改编自：http://msdn.microsoft.com/en-us/library/windows/desktop/bb773974(v=vs.85).aspx
干杯
编辑：我将没有返回完整路径的ie.locationname更改为ie.document.focuseditem.path，到目前为止似乎可以正常工作。

以下是System.__ComObject的属性列表。

PS C:\NodeJs\loginapp> $Browser | gm

TypeName: System.__ComObject#{d30c1661-cdaf-11d0-8a3e-00c04fc9e26e}

Name                 MemberType Definition
----                 ---------- ----------
ClientToWindow       Method     void ClientToWindow (int, int)
ExecWB               Method     void ExecWB (OLECMDID, OLECMDEXECOPT, Variant, Variant)
GetProperty          Method     Variant GetProperty (string)
GoBack               Method     void GoBack ()
GoForward            Method     void GoForward ()
GoHome               Method     void GoHome ()
GoSearch             Method     void GoSearch ()
Navigate             Method     void Navigate (string, Variant, Variant, Variant, Variant)
Navigate2            Method     void Navigate2 (Variant, Variant, Variant, Variant, Variant)
PutProperty          Method     void PutProperty (string, Variant)
QueryStatusWB        Method     OLECMDF QueryStatusWB (OLECMDID)
Quit                 Method     void Quit ()
Refresh              Method     void Refresh ()
Refresh2             Method     void Refresh2 (Variant)
ShowBrowserBar       Method     void ShowBrowserBar (Variant, Variant, Variant)
Stop                 Method     void Stop ()
AddressBar           Property   bool AddressBar () {get} {set}
Application          Property   IDispatch Application () {get}
Busy                 Property   bool Busy () {get}
Container            Property   IDispatch Container () {get}
Document             Property   IDispatch Document () {get}
FullName             Property   string FullName () {get}
FullScreen           Property   bool FullScreen () {get} {set}
Height               Property   int Height () {get} {set}
HWND                 Property   int HWND () {get}
Left                 Property   int Left () {get} {set}
LocationName         Property   string LocationName () {get}
LocationURL          Property   string LocationURL () {get}
MenuBar              Property   bool MenuBar () {get} {set}
Name                 Property   string Name () {get}
Offline              Property   bool Offline () {get} {set}
Parent               Property   IDispatch Parent () {get}
Path                 Property   string Path () {get}
ReadyState           Property   tagREADYSTATE ReadyState () {get}
RegisterAsBrowser    Property   bool RegisterAsBrowser () {get} {set}
RegisterAsDropTarget Property   bool RegisterAsDropTarget () {get} {set}
Resizable            Property   bool Resizable () {get} {set}
Silent               Property   bool Silent () {get} {set}
StatusBar            Property   bool StatusBar () {get} {set}
StatusText           Property   string StatusText ($) {get} {set}
TheaterMode          Property   bool TheaterMode () {get} {set}
ToolBar              Property   int ToolBar () {get} {set}
Top                  Property   int Top () {get} {set}
TopLevelContainer    Property   bool TopLevelContainer () {get}
Type                 Property   string Type () {get}
Visible              Property   bool Visible () {get} {set}
Width                Property   int Width () {get} {set}

我改变了这代码上面像这样

var t = Type.GetTypeFromProgID("Shell.Application");
        dynamic o = Activator.CreateInstance(t);
        try
        {
            var ws = o.Windows();
            for (int i = 0; i < ws.Count; i++)
            {
                var ie = ws.Item(i);
                if (ie == null) continue;
                var path = System.IO.Path.GetFileName((string)ie.FullName);
                if (path.ToLower() == "explorer.exe")
                {
                    string locationPath = ie.LocationURL;
                }
            }
        }
        finally
        {
            Marshal.FinalReleaseComObject(o);
        }

即LocationURL返回打开窗口的路径
Look

如果你运行spy++和目标浏览器窗口，你会看到该窗口的标题或标题通常反映用户打开的当前目录
所以你需要的是使用窗口句柄你需要得到它的标题。我建议下面的链接将指导你
http://social.msdn.microsoft.com/Forums/vstudio/en-US/fd03235e-22af-41a4-aa95-2806b3cb1114/win32-getting-a-window-title-from-a-hwnd?forum=csharpgeneral
How to get the name of an External window in C# Application?