INT FASTCALL DefWndSetHotKey	(	PWND	pWnd,
		WPARAM	wParam
	)
Definition at line 267 of file hotkey.c.
Referenced by IntDefWindowProc().
{
    UINT fsModifiers, vk;
    PHOT_KEY pHotKey, *pLink;
    HWND hWnd;
    INT iRet = 1;

    WARN("DefWndSetHotKey wParam 0x%x\n", wParam);

    // A hot key cannot be associated with a child window.
    if (pWnd->style & WS_CHILD)
        return 0;

    // VK_ESCAPE, VK_SPACE, and VK_TAB are invalid hot keys.
    if (LOWORD(wParam) == VK_ESCAPE ||
        LOWORD(wParam) == VK_SPACE ||
        LOWORD(wParam) == VK_TAB)
    {
        return -1;
    }

    vk = LOWORD(wParam);
    fsModifiers = HIWORD(wParam);
    hWnd = UserHMGetHandle(pWnd);

    if (wParam)
    {
        pHotKey = gphkFirst;
        while (pHotKey)
        {
            if (pHotKey->fsModifiers == fsModifiers &&
                pHotKey->vk == vk &&
                pHotKey->id == IDHK_REACTOS)
            {
                if (pHotKey->hWnd != hWnd)
                    iRet = 2; // Another window already has the same hot key.
                break;
            }

            /* Move to the next entry */
            pHotKey = pHotKey->pNext;
        }
    }
    
    pHotKey = gphkFirst;
    pLink = &gphkFirst;
    while (pHotKey)
    {
        if (pHotKey->hWnd == hWnd &&
            pHotKey->id == IDHK_REACTOS)
        {
            /* This window has already hotkey registered */
            break;
        }

        /* Move to the next entry */
        pLink = &pHotKey->pNext;
        pHotKey = pHotKey->pNext;
    }

    if (wParam)
    {
        if (!pHotKey)
        {
            /* Create new hotkey */
            pHotKey = ExAllocatePoolWithTag(PagedPool, sizeof(HOT_KEY), USERTAG_HOTKEY);
            if (pHotKey == NULL)
                return 0;

            pHotKey->hWnd = hWnd;
            pHotKey->id = IDHK_REACTOS; // Don't care, these hot keys are unrelated to the hot keys set by RegisterHotKey
            pHotKey->pNext = gphkFirst;
            gphkFirst = pHotKey;
        }

        /* A window can only have one hot key. If the window already has a
           hot key associated with it, the new hot key replaces the old one. */
        pHotKey->pThread = NULL;
        pHotKey->fsModifiers = fsModifiers;
        pHotKey->vk = vk;
    }
    else if (pHotKey)
    {
        /* Remove hotkey */
        *pLink = pHotKey->pNext;
        ExFreePoolWithTag(pHotKey, USERTAG_HOTKEY);
    }

    return iRet;
}
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