Check TreeView ScrollBar Visibility

Question

How can i check if the Vertical ScrollBar in a TreeView is Visible?

Answer 1

You must do some p/invoke to get the style of TreeView.

    private const int GWL_STYLE = -16;
    private const int WS_VSCROLL = 0x00200000;
    [DllImport("user32.dll", ExactSpelling = false, CharSet = CharSet.Auto)]
    private static extern int GetWindowLong(IntPtr hWnd, int nIndex);

    bool VScrollVisible()
    {
        int style = GetWindowLong(myTreeView.Handle, GWL_STYLE);
        return  ((style & WS_VSCROLL) != 0);
    }