pMsg->hwnd = hNeedPaint;            pWin = (PMAINWIN) hNeedPaint;            pMsg->lParam = (LPARAM)(&pWin->InvRgn.rgn);            return 1;        }                pMsgQueue->dwState &= ~QS_PAINT;    }        if (pMsgQueue->dwState & QS_DESKTIMER) {        pMsg->hwnd = HWND_DESKTOP;        pMsg->message = MSG_TIMER;        pMsg->wParam = 0;        pMsg->lParam = 0;        pMsgQueue->dwState &= ~QS_DESKTIMER;        return 1;    }    if (pMsgQueue->dwState & QS_TIMER) {        for (slot = 0; slot < DEF_NR_TIMERS; slot++) {            if (pMsgQueue->dwState & (0x01 << slot))                break;        }        if (slot == DEF_NR_TIMERS) {            pMsgQueue->dwState &= ~QS_TIMER;        }        else {            pMsg->hwnd = pMsgQueue->TimerOwner[slot];            pMsg->message = MSG_TIMER;            pMsg->wParam = pMsgQueue->TimerID[slot];            pMsg->lParam = 0;            pMsgQueue->dwState &= ~(0x01 << slot);            return 1;        }    }    // no message, wait again.    pMsgQueue->OnIdle (pMsgQueue);    goto checkagain;    return 1;}BOOL GUIAPI EmptyMessageQueue (HWND hWnd){    int i;    PMSGQUEUE   pMsgQueue;    PQMSG       pQMsg, temp;    if( !(pMsgQueue = GetMsgQueue(hWnd)) ) return FALSE;    if (pMsgQueue->pFirstNotifyMsg) {        pQMsg = pMsgQueue->pFirstNotifyMsg;        while (pQMsg) {            temp = pQMsg->next;            FreeQMSG (pQMsg);            pQMsg = temp;        }    }    pMsgQueue->pFirstNotifyMsg = NULL;    pMsgQueue->pLastNotifyMsg = NULL;    pMsgQueue->readpos = 0;    pMsgQueue->writepos = 0;    for (i = 0; i < DEF_NR_TIMERS; i++) {        pMsgQueue->TimerOwner [i] = HWND_DESKTOP;        pMsgQueue->TimerID [i] = 0;    }    TerminateTimer ();    pMsgQueue->dwState = QS_EMPTY;    pMsgQueue->TimerMask = 0xFFFF;    return TRUE;}int GUIAPI ThrowAwayMessages (HWND hWnd){    PMSG        pMsg;    PMSGQUEUE   pMsgQueue;    PQMSG       pQMsg;    int         nCount = 0;    int         readpos;    if( !(pMsgQueue = GetMsgQueue(hWnd)) ) return ERR_INV_HWND;    if (pMsgQueue->pFirstNotifyMsg) {        pQMsg = pMsgQueue->pFirstNotifyMsg;                while (pQMsg) {            pMsg = &pQMsg->Msg;            if (pMsg->hwnd == hWnd                    || GetMainWindowPtrOfControl (pMsg->hwnd) == (PMAINWIN)hWnd) {                pMsg->hwnd = HWND_INVALID;                nCount ++;            }            pQMsg = pQMsg->next;        }    }    readpos = pMsgQueue->readpos;    while (readpos != pMsgQueue->writepos) {        pMsg = pMsgQueue->msg + readpos;        if (pMsg->hwnd == hWnd                || GetMainWindowPtrOfControl (pMsg->hwnd) == (PMAINWIN)hWnd) {            pMsg->hwnd = HWND_INVALID;            nCount ++;        }                readpos++;        if (readpos >= pMsgQueue->len)             readpos = 0;    }    return nCount;}BOOL GUIAPI PeekPostMessage (PMSG pMsg, HWND hWnd, int iMsgFilterMin,                         int iMsgFilterMax, UINT uRemoveMsg){    PMSGQUEUE pMsgQueue;    PMSG pPostMsg;        if( !(pMsgQueue = GetMsgQueue(hWnd)) ) return FALSE;    memset (pMsg, 0, sizeof(MSG));    if (pMsgQueue->dwState & QS_POSTMSG) {            if (pMsgQueue->readpos != pMsgQueue->writepos) {            pPostMsg = pMsgQueue->msg + pMsgQueue->readpos;            if (iMsgFilterMin == 0 && iMsgFilterMax == 0)                *pMsg = *pPostMsg;            else if (pPostMsg->message <= iMsgFilterMax &&                    pPostMsg->message >= iMsgFilterMin)                *pMsg = *pPostMsg;            else {                return FALSE;            }                        if (uRemoveMsg == PM_REMOVE) {                pMsgQueue->readpos++;                if (pMsgQueue->readpos >= pMsgQueue->len)                     pMsgQueue->readpos = 0;            }            return TRUE;        }    }    return FALSE;}                        int GUIAPI PostMessage (HWND hWnd, int iMsg, WPARAM wParam, LPARAM lParam){    PMSGQUEUE pMsgQueue;    PMSG pMsg;    if( !(pMsgQueue = GetMsgQueue(hWnd)) ) return ERR_INV_HWND;    if (iMsg == MSG_PAINT) {        pMsgQueue->dwState |= QS_PAINT;        goto goodret;    }        if ((pMsgQueue->writepos + 1) % pMsgQueue->len == pMsgQueue->readpos) {        return ERR_QUEUE_FULL;    }        // Write the data and advance write pointer */    pMsg = &(pMsgQueue->msg[pMsgQueue->writepos]);    pMsg->hwnd = hWnd;    pMsg->message = iMsg;    pMsg->wParam = wParam;    pMsg->lParam = lParam;    pMsgQueue->writepos++;    if (pMsgQueue->writepos >= pMsgQueue->len) pMsgQueue->writepos = 0;    pMsgQueue->dwState |= QS_POSTMSG;goodret:    return ERR_OK;}int GUIAPI PostQuitMessage (HWND hWnd){    PMSGQUEUE pMsgQueue;    if( !(pMsgQueue = GetMsgQueue(hWnd)) ) return ERR_INV_HWND;    pMsgQueue->dwState |= QS_QUIT;    return ERR_OK;}int GUIAPI SendMessage (HWND hWnd, int iMsg, WPARAM wParam, LPARAM lParam){    WNDPROC WndProc;    if (hWnd == HWND_INVALID) return -1;    WndProc = GetWndProc (hWnd);    return (*WndProc)(hWnd, iMsg, wParam, lParam);}int GUIAPI SendNotifyMessage (HWND hWnd, int iMsg, WPARAM wParam, LPARAM lParam){    PMSGQUEUE pMsgQueue;    PQMSG pqmsg;    if (hWnd == HWND_INVALID) return -1;    if( !(pMsgQueue = GetMsgQueue(hWnd)) ) return ERR_INV_HWND;    pqmsg = QMSGAlloc();    // queue the notification message.    pqmsg->Msg.hwnd = hWnd;    pqmsg->Msg.message = iMsg;    pqmsg->Msg.wParam = wParam;    pqmsg->Msg.lParam = lParam;    pqmsg->next = NULL;    if (pMsgQueue->pFirstNotifyMsg == NULL) {        pMsgQueue->pFirstNotifyMsg = pMsgQueue->pLastNotifyMsg = pqmsg;    }    else {        pMsgQueue->pLastNotifyMsg->next = pqmsg;        pMsgQueue->pLastNotifyMsg = pqmsg;    }    pMsgQueue->dwState |= QS_NOTIFYMSG;    return ERR_OK;}#ifdef _TRACE_MSGint GUIAPI DispatchMessage (PMSG pMsg){    WNDPROC WndProc;    int iRet;    fprintf (stderr, "Message, %s: hWnd: %x, wP: %x, lP: %lx.\n",        Message2Str (pMsg->message),        pMsg->hwnd,        pMsg->wParam,        pMsg->lParam);    if (pMsg->hwnd == HWND_INVALID)        return HWND_INVALID;    WndProc = GetWndProc (pMsg->hwnd);    iRet = (*WndProc)(pMsg->hwnd, pMsg->message, pMsg->wParam, pMsg->lParam);    fprintf (stderr, "Message, %s done, return value: %x\n",        Message2Str (pMsg->message),        iRet);    return iRet;}#elseint GUIAPI DispatchMessage(PMSG pMsg){    WNDPROC WndProc;    if (pMsg->hwnd == HWND_INVALID)        return HWND_INVALID;    WndProc = GetWndProc(pMsg->hwnd);    return (*WndProc)(pMsg->hwnd, pMsg->message, pMsg->wParam, pMsg->lParam);}#endif /* !TRACE_MSG */#elseint GUIAPI GetMessage (PMSG pMsg, HWND hWnd){    PMSGQUEUE pMsgQueue;    PQMSG phead;    int slot;    if( !(pMsgQueue = GetMsgQueue(hWnd)) ) return ERR_INV_HWND;    memset (pMsg, 0, sizeof(MSG));checkagain:    if (pMsgQueue->dwState & QS_QUIT) {        pMsg->hwnd = hWnd;        pMsg->message = MSG_QUIT;        pMsg->wParam = 0;        pMsg->lParam = 0;        pMsg->pAdd = NULL;        pMsgQueue->dwState &= ~QS_QUIT;                return 0;    }    if (pMsgQueue->dwState & QS_NOTIFYMSG) {               pthread_mutex_lock (&pMsgQueue->lock);        if (pMsgQueue->pFirstNotifyMsg) {            phead = pMsgQueue->pFirstNotifyMsg;            pMsgQueue->pFirstNotifyMsg = phead->next;                        *pMsg = phead->Msg;            pMsg->pAdd = NULL;            FreeQMSG (phead);            pthread_mutex_unlock (&pMsgQueue->lock);            return 1;        }        else            pMsgQueue->dwState &= ~QS_NOTIFYMSG;                pthread_mutex_unlock (&pMsgQueue->lock);    }    if (pMsgQueue->dwState & QS_SYNCMSG) {        pthread_mutex_lock (&pMsgQueue->lock);        if (pMsgQueue->pFirstSyncMsg) {            *pMsg = pMsgQueue->pFirstSyncMsg->Msg;            pMsg->pAdd = pMsgQueue->pFirstSyncMsg;            pMsgQueue->pFirstSyncMsg = pMsgQueue->pFirstSyncMsg->pNext;            pthread_mutex_unlock (&pMsgQueue->lock);            return 1;        }        else            pMsgQueue->dwState &= ~QS_SYNCMSG;                    pthread_mutex_unlock (&pMsgQueue->lock);    }    if (pMsgQueue->dwState & QS_POSTMSG) {            pthread_mutex_lock (&pMsgQueue->lock);        if (pMsgQueue->readpos != pMsgQueue->writepos) {            *pMsg = pMsgQueue->msg[pMsgQueue->readpos];            CheckCapturedMouseMessage (pMsg);            pMsg->pAdd = NULL;            pMsgQueue->readpos++;            if (pMsgQueue->readpos >= pMsgQueue->len) pMsgQueue->readpos = 0;            pthread_mutex_unlock (&pMsgQueue->lock);            return 1;        }        else            pMsgQueue->dwState &= ~QS_POSTMSG;        pthread_mutex_unlock (&pMsgQueue->lock);    }    if (pMsgQueue->dwState & QS_PAINT) {        PMAINWIN pHostingRoot;        HWND hNeedPaint;        PMAINWIN pWin;                if (hWnd == HWND_DESKTOP) {            pMsg->hwnd = hWnd;            pMsg->message = MSG_PAINT;            pMsg->wParam = 0;            pMsg->lParam = 0;            pMsg->pAdd = NULL;            pthread_mutex_lock (&pMsgQueue->lock);            pMsgQueue->dwState &= ~QS_PAINT;            pthread_mutex_unlock (&pMsgQueue->lock);            return 1;        }        pMsg->message = MSG_PAINT;        pMsg->wParam = 0;        pMsg->lParam = 0;        pMsg->pAdd = NULL;        pWin = GetMainWindowPtrOfControl (hWnd);        pHostingRoot = msgGetHostingRoot (pWin);        if ( (hNeedPaint = msgCheckHostedTree (pHostingRoot)) ) {            pMsg->hwnd = hNeedPaint;            pWin = (PMAINWIN) hNeedPaint;            pMsg->lParam = (LPARAM)(&pWin->InvRgn.rgn);            return 1;        }                pthread_mutex_lock (&pMsgQueue->lock);        pMsgQueue->dwState &= ~QS_PAINT;        pthread_mutex_unlock (&pMsgQueue->lock);    }        if (pMsgQueue->dwState & QS_TIMER) {        if (hWnd == HWND_DESKTOP) {            pMsg->hwnd = hWnd;            pMsg->message = MSG_TIMER;            pMsg->wParam = 0;            pMsg->lParam = 0;            pMsg->pAdd = NULL;            pthread_mutex_lock (&pMsgQueue->lock);            pMsgQueue->dwState &= ~0x01;            pthread_mutex_unlock (&pMsgQueue->lock);            return 1;        }                pthread_mutex_lock (&pMsgQueue->lock);        for (slot = 0; slot < DEF_NR_TIMERS; slot++) {