Winform 判断控件是否出现滚动条
private const int WS_HSCROLL = 0x100000;
private const int WS_VSCROLL =
0x200000;
private const int GWL_STYLE = (-16);
[System.Runtime.InteropServices.DllImport("user32",CharSet =
System.Runtime.InteropServices.CharSet.Auto)]
private static extern int
GetWindowLong(IntPtr hwnd, int nIndex);
/// <summary>
/// 判断是否出现垂直滚动条
/// </summary>
/// <param
name="ctrl">待测控件</param>
/// <returns>出现垂直滚动条返回true,否则为false</returns>
internal static bool
IsVerticalScrollBarVisible(Control ctrl)
{
if
(!ctrl.IsHandleCreated)
return false;
return
(GetWindowLong(ctrl.Handle, GWL_STYLE) & WS_VSCROLL) != 0;
}
/// <summary>
/// 判断是否出现水平滚动条
/// </summary>
/// <param
name="ctrl">待测控件</param>
/// <returns>出现水平滚动条返回true,否则为false</returns>
internal static bool
IsHorizontalScrollBarVisible(Control ctrl)
{
if
(!ctrl.IsHandleCreated)
return false;
return
(GetWindowLong(ctrl.Handle, GWL_STYLE) & WS_HSCROLL) != 0;
}