Using WM_HSCROLL with a child dialog

[Time_Runner]

I have tried to change the WM_VSCROLL into a WM_HSCROLL however regardless of what I do the HSCROLL will move my page top to bottom instead of left to right. What am I doing wrong?

[Gintaras]

Member function ChildDialog.__DlgProc

Code:

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,ScrollWindowEx hDlg ppos-pos 0 0 0 0 0 SW_SCROLLCHILDREN|SW_ERASE|SW_INVALIDATE

Also change this code (here is unchanged)
Member function ChildDialog.Message

Code:

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,if(r.bottom<rc.bottom)
,,SCROLLINFO si.cbSize=sizeof(si)
,,si.fMask=SIF_RANGE|SIF_PAGE
,,si.nMax=rc.bottom
,,si.nPage=r.bottom
,,SetScrollInfo m_hdlgc SB_HORZ &si 0
,,m_scmax=si.nMax-si.nPage
,,m_scpage=si.nPage

[Time_Runner]

Also change this code (here is unchanged)
Member function ChildDialog.Message

Code:

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,if(r.bottom<rc.bottom)
,,SCROLLINFO si.cbSize=sizeof(si)
,,si.fMask=SIF_RANGE|SIF_PAGE
,,si.nMax=rc.bottom
,,si.nPage=r.bottom
,,SetScrollInfo m_hdlgc SB_HORZ &si 0
,,m_scmax=si.nMax-si.nPage
,,m_scpage=si.nPage

I do not understand. If I leave this code alone then the macro works fine. If I change this code then the SCROLL bar will not show. Am I still missing something?

[Gintaras]

Don't delete that code. Edit something in it, because now it is for vertical scrollbar.