/// <summary>
/// 设置控件的工作区的高度和宽度。
/// </summary>
/// <param name="hWnd">控件句柄。</param>
/// <param name="value">一个 System.Drawing.Size，表示控件的工作区的维数。</param>
public static void SetClientSize(IntPtr hWnd, Size value)
{
NativeMethods.RECT lpRect = new NativeMethods.RECT(0, 0, value.Width, value.Height);
int dwStyle = UnsafeNativeMethods.GetWindowLong(hWnd, NativeMethods.GWL_STYLE);
int dwExStyle = UnsafeNativeMethods.GetWindowLong(hWnd, NativeMethods.GWL_EXSTYLE);
UnsafeNativeMethods.AdjustWindowRectEx(ref lpRect, dwStyle, false, dwExStyle);
SetSize(hWnd, lpRect.Size);
}
/// <summary>
/// 获取指定窗口包含的滚动条。
/// </summary>
/// <param name="hWnd">窗口句柄。</param>
/// <returns>返回值见 System.Windows.Forms.ScrollBars 定义</returns>
public static int GetScrollBars(IntPtr hWnd)
{
int wndStyle = UnsafeNativeMethods.GetWindowLong(hWnd, NativeMethods.GWL_STYLE);
bool hsVisible = (wndStyle & NativeMethods.WS_HSCROLL) != 0;
bool vsVisible = (wndStyle & NativeMethods.WS_VSCROLL) != 0;
if (hsVisible)
{
return(vsVisible ? 3 : 1);
}
else
{
return(vsVisible ? 2 : 0);
}
}
/// <summary>
/// 获取一个值，该值指示是否将控件显示为顶级窗口。
/// </summary>
/// <param name="hWnd">控件句柄。</param>
/// <returns>如果为 true，则将控件显示为顶级窗口；否则，为 false。</returns>
public static bool GetTopLevel(IntPtr hWnd)
{
int dwStyle = UnsafeNativeMethods.GetWindowLong(hWnd, NativeMethods.GWL_STYLE);
return((dwStyle & NativeMethods.WS_CHILD) == 0);
}
/// <summary>
/// 获取控件是否TopMost(判断控件是否为“TopMost”类型的窗口，这种类型的窗口总是在其它窗口的前面)
/// </summary>
/// <param name="hWnd">要判断的窗口</param>
public static bool IsTopMost(IntPtr hWnd)
{
return((UnsafeNativeMethods.GetWindowLong(hWnd, NativeMethods.GWL_EXSTYLE) & NativeMethods.WS_EX_TOPMOST) != 0);
}
/// <summary>
/// 获取指定窗口是否有左滚动条样式。
/// </summary>
/// <param name="hWnd">窗口句柄。</param>
/// <returns>窗口有左滚动条样式返回 true，否则返回 false。</returns>
public static bool GetLeftScrollBar(IntPtr hWnd)
{
int wndExStyle = UnsafeNativeMethods.GetWindowLong(hWnd, NativeMethods.GWL_EXSTYLE);
return((wndExStyle & NativeMethods.WS_EX_LEFTSCROLLBAR) != 0);
}
