How to get the accurate position of ole in a richedit?

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C++

MFC

WTL

hi

Recently, I have a question.

i want to do something when i click a ole in a richedit,but i find that i can not get the accurate position of ole.

Now,one way to get the position like this.

the "rcLastUpdate" is the i am using.

sometimes,it is not accurate,when the ole is not visible.

STDMETHOD(Draw)(DWORD dwDrawAspect, LONG lindex, void *pvAspect,    DVTARGETDEVICE *ptd, HDC hicTargetDev, HDC hdcDraw,
LPCRECTL prcBounds, LPCRECTL prcWBounds,
BOOL (__stdcall * /*pfnContinue*/)(DWORD_PTR dwContinue),DWORD_PTR /*dwContinue*/)
{
    if (prcBounds != NULL)
    {
        m_rcLastUpdate.left = prcBounds->left + 1;
        m_rcLastUpdate.top = prcBounds->top + 1;
        m_rcLastUpdate.right = prcBounds->right - 1;
        m_rcLastUpdate.bottom = prcBounds->bottom - 1;
    }
    IViewObject_Draw(dwDrawAspect, lindex, pvAspect, ptd, hicTargetDev, hdcDraw,
        prcBounds, prcWBounds);
    return 0;
}

another way is that use "posfromchar()".

POINT posLeftBottom={PosFromChar(CPN).x, PosFromChar(CPN1).y }

cpn: the index of the ole .
CPN1: a char in the next line.

then i can get the position of the ole.

i think there must be a better solution.

so i want to know, how can i get the accurate position of ole?


thanks, recently asked more questions。 hoho,have more i should to learn.