Drawing OCX to given printer-devicecontext

问题

In order to print some data I have to print an OCX as well. To do so I create a printer-dc from the GUI, print on it and so on. When it comes to printing the OCX I want to use its existing Draw-Method but to the printer-devicecontext I have. The code shown seems to work but look kind of hacked to me and I'm not sure if it works just "by accident". So the question is: Is this the right way to give a device-Context via Com-call to the OCX and use it?

This is in an Visual-C++-MFC-Project targeting windows

///////////////////////////////////// OCX
//IDL
[id(79)] void DrawBeamerToDC(OLE_HANDLE printerDC,
                             LONG drawRectLeft, LONG drawRectTop,
                             LONG drawRectRight, LONG drawRectBottom);

//the OCX-.cpp
void CSPCListViewCtrl::DrawBeamerToDC(OLE_HANDLE printerDC,
                                      LONG drawRectLeft, LONG drawRectTop,
                                      LONG drawRectRight, LONG drawRectBottom)
{
    AFX_MANAGE_STATE(AfxGetStaticModuleState());

    CRect rectDraw(drawRectLeft, drawRectTop, drawRectRight, drawRectBottom);
    CDC* pDc = CDC::FromHandle((HDC)printerDC);
    DrawMe(pDc, rectDraw);
}

////////////////////////////////// client
//the OCX-Wrapper (generated)
//note that OLE_HANDLE  gets translated to a plain long
void CSPCListView::DrawBeamerToDC(long printerDC,
                                  long drawRectLeft, long drawRectTop,
                                  long drawRectRight, long drawRectBottom)
{
    static BYTE parms[] = VTS_I4 VTS_I4 VTS_I4 VTS_I4 VTS_I4;
    InvokeHelper(0x4f, DISPATCH_METHOD, VT_EMPTY, NULL, parms,
                 printerDC,
                 drawRectLeft, drawRectTop,
                 drawRectRight, drawRectBottom);
}

//the callers .cpp
CRect rectBeamer = GetRectoPrintInColumnRectFromPrintRect();
CSPCListView* ptestctrl = GetOCXToPrint();
ptestctrl->DrawBeamerToDC((long)m_hPrintDC,
                          rectBeamer.left, rectBeamer.top,
                          rectBeamer.right, rectBeamer.bottom);

来源：https://stackoverflow.com/questions/56337654/drawing-ocx-to-given-printer-devicecontext