visual studio - Adding scrollbar to an activeX control in MFC -

i'm trying create activex control using microsoft foundation class library.

i have created control. it's graph control. have placed buttons on control well.

i trying add scrollbar control using cscrollbar class.

i create control using cscrollbar::create method. can see control when use activex control in application.

i have added onhscroll method control class. derives colecontrol class .

when scroll use cscrollbar::getscrollpos scroll position returns zero.

here code creating scrollbar in activex control.

code control in mainclass.h file:

private: cscrollbar m_hscrollbar;  protected: afx_msg void onhscroll(uint nsbcode, uint npos, cscrollbar* pscrollbar);  declare_message_map() 

code control in mainclass.cpp in oncreate() method creating scrollbar:

m_hscrollbar.create(sbs_horz | ws_child| ws_visible , crect(rcbottomstrip.left  , rcbottomstrip.bottom  , rcbottomstrip.right , rcbottomstrip.bottom  + (theight*3)/125),this, 315);  m_hscrollbar.setscrollrange(0, 2048);  scrollinfo scrollinfo; scrollinfo.cbsize = sizeof(scrollinfo); scrollinfo.fmask = sif_range;         scrollinfo.nmin = 0;                 scrollinfo.nmax = 1128;               scrollinfo.npage = 100;               scrollinfo.npos = 0;                 scrollinfo.ntrackpos = 0;           m_hscrollbar.setscrollinfo(&scrollinfo); m_hscrollbar.showscrollbar(true); m_hscrollbar.enablewindow(); m_hscrollbar.enableautomation(); 

in onhscroll method return scroll position , moving scrollbar:

int curpos = m_hscrollbar.getscrollpos(); m_hscrollbar.setscrollpos(curpos); 

i replaced cscrollbar , used hwnd instead. code changed this:

//mainclass.h

hwnd m_wndhscrollbar; 

//mainclass.cpp

m_wndhscrollbar = (createwindowex(                      0,                      // no extended styles                      scrollbar,           // scroll bar control class                      (ptstr) null,           // no window text                      ws_child | ws_visible   // window styles                           | sbs_horz,         // horizontal scroll bar style                      left,              // horizontal position                      bottom, // vertical position                      right,             // width of scroll bar                      height,               // height of scroll bar                     m_hwnd,             // handle main window                      (hmenu) id_hscrollbar,           // no menu                      getmodulehandle(null),                // instance owning window                      (pvoid) null            // pointer not needed                  ));