CListBox::GetHorizontalExtent

int GetHorizontalExtent( ) const;

Return Value

The scrollable width of the list box, in pixels.

Remarks

Retrieves from the list box the width in pixels by which it can be scrolled horizontally. This is applicable only if the list box has a horizontal scroll bar.

Example

// The pointer to my list box.
extern CListBox* pmyListBox;

// Find the longest string in the list box.
CString str;
CSize   sz;
int     dx=0;
CDC*    pDC = pmyListBox->GetDC();
for (int i=0;i < pmyListBox->GetCount();i++)
{
   pmyListBox->GetText( i, str );
   sz = pDC->GetTextExtent(str);

   if (sz.cx > dx)
      dx = sz.cx;
}
pmyListBox->ReleaseDC(pDC);

// Set the horizontal extent only if the current extent is not large enough.
if (pmyListBox->GetHorizontalExtent() < dx)
{
   pmyListBox->SetHorizontalExtent(dx);
   ASSERT(pmyListBox->GetHorizontalExtent() == dx);
}

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