CListBox::GetHorizontalExtent
Retrieves from the list box the width in pixels by which it can be scrolled horizontally.
int GetHorizontalExtent( ) const;
Return Value
The scrollable width of the list box, in pixels.
Remarks
This is applicable only if the list box has a horizontal scroll bar.
Example
// Find the longest string in the list box.
CString str;
CSize sz;
int dx=0;
CDC* pDC = m_myListBox.GetDC();
for (int i=0;i < m_myListBox.GetCount();i++)
{
m_myListBox.GetText( i, str );
sz = pDC->GetTextExtent(str);
if (sz.cx > dx)
dx = sz.cx;
}
m_myListBox.ReleaseDC(pDC);
// Set the horizontal extent only if the current extent is not large enough.
if (m_myListBox.GetHorizontalExtent() < dx)
{
m_myListBox.SetHorizontalExtent(dx);
ASSERT(m_myListBox.GetHorizontalExtent() == dx);
}
Requirements
Header: afxwin.h