Question

Is there a way to check if the Vertical Scroll Bar is visible on a certain ListView object?

I got a Windows Forms with a listView on it, on the resize event i would like to catch if the listview has its Vertical Scroll Bar visible!

Answer 1

If this is WPF a sample exist here which at the base of the solution hooks on to ListView.LayoutUpdated.

If this is WinForms you could make use of pinvoke and GetWindowLong…

  static public class WndInfo
  {
    [DllImport("user32.dll", SetLastError = true)]
    static extern int GetWindowLong(IntPtr hWnd, int nIndex);

    ...
    public static bool IsWindowTopMost(IntPtr Handle)
    {
      return (GetWindowLong(Handle, GWL_EXSTYLE) & WS_EX_TOPMOST) != 0;
    }
    ...
  }

VB code exists using GetWindowLong to check if a ScrollBar exist which you could port to C#.