Incorrect module thread state retunred inside a keyboardproc

Hi All,
I am a facing problem in getting the correct module thread state
inside a keyboardproc installed for WH_KEYBOARD hook. Here you go: I
have an activex control converted from MFC exe project. This MFC(?)
project contains a lot of legacy code which were written using
callback functions and hooks before MFC came to picture; In one of the
screens, I have a combo box; when I try to get the dropdown list from
the combo box, it installs a WH_KEYBOARD hook and also saves the
pointer of the parent window to a file level static member. While
leaving the list by pressing tab, the hook gives the parent window a
chance to handle the keydown message which in turn delete some
internally associated windows. Now, here is the problem: I am getting
an assertion failure at
Code Block
CWnd::DestroyWindow()
....
pMap = afxMapHWND();
         ENSURE(pMap != NULL);
....

I found at the following lines that it is returning the invalid thread
state:

Code Block

CHandleMap* PASCAL afxMapHWND(BOOL bCreate)
{
    AFX_MODULE_THREAD_STATE* pState = AfxGetModuleThreadState(); //
Invalid thread state
....
}

Is there a way to get the valid thread state at KeyBoardProc itself.
The hook and the screen mentioned here reside in an extension dll.

It works fine if I call the next hook procedure (CallNextHookEx)
instead of giving it to the parent window (Ofcourse, parent window
gets a chance to handle the keydown message) but I want to know the
way to get valid thread state inside KeyBoardProc.