IBrowserThreadState

This interface is implemented in IEFRAME and seems new to Windows Vista. Closer inspection may reveal it or something similar in some other module in an earlier Windows version. The IID is:

IBrowserThreadState

{CCD6F2EB-D12A-40C7-8683-509F1C818EAE}

This interface is not completely undocumented. It doesn’t get even a declaration in any Windows SDK header, but the corresponding IID_IBrowserThreadState is defined in the UUID.LIB library.

Methods

The IBrowserThreadState methods are:

Offset	Method
0x0C	QueryDownloadPromptAllowed
0x10	IncrementUserActionID
0x14	GetUserActionID
0x18	GetLastHookTime
0x1C	SetParentThreadID
0x20	RegisterHookEvents

Prototypes

The following are known from Microsoft’s symbol file for IEFRAME:

HRESULT QueryDownloadPromptAllowed (ULONG);

HRESULT IncrementUserActionID (VOID);

HRESULT GetUserActionID (ULONG *);

HRESULT GetLastHookTime (HWND, ULONG *);

HRESULT SetParentThreadID (ULONG);

HRESULT RegisterHookEvents (IBrowserHookEvents *, ULONG, ULONG, ULONG);

Of course, the IBrowserHookEvents interface is undocumented also.

Implementations

The only known implementation is by the BrowserThreadState class, which IEFRAME exposes through its DllGetClassObject function as if for the following IDL declaration:

[
    uuid (A6B222AB-A5EA-4899-B230-084657EDDC7D)
]
coclass BrowserThreadState
{
    [default] interface IBrowserThreadState;
};

This too is undocumented, though the CLSID_BrowserThreadState symbol is defined in the UUID.LIB library. The only known use is from MSHTML.