有一个WinForms设置为可调整大小在Windows 8中，的 DesktopBounds 属性告诉正确的值：

Having a WinForms form with form border style set to Sizable on Windows 8, the DesktopBounds property tells the correct values:

相反，具有 FixedDialog 的形式边框样式时，该值是错误的：

In contrast, when having a form border style of FixedDialog, the values are wrong:

在Windows XP中，值始终是正确的：

On Windows XP, the values are always correct:

我的问题是：

如何获得一个窗口的实际大小，包括完整的非客户区？

How to get the real size of a Window including the complete non-client area?

更新1：

似乎是关系到这太问题。我会尝试，看看这是否会解决我的问题也在这里。

Seems that it is related to this SO question. I'll try and see whether this would solve my issue here, too.

更新2：

只是为了完整性，这里有来自VMware的Windows 7的结果：

Just for completeness, here are the results from a VMware Windows 7:

更新3：

终于找到，其中包括使用的 DwmGetWindowAttribute 功能一起的 DWMWA_EXTENDED_FRAME_BOUNDS 值。我会后下面的答案。

Finally found a solution which involves using the DwmGetWindowAttribute function together with the DWMWA_EXTENDED_FRAME_BOUNDS value. I'll post an answer below.

推荐答案

要回答我的问题，我终于发现，其中包括使用的 DwmGetWindowAttribute 功能一起的 DWMWA_EXTENDED_FRAME_BOUNDS 值

To answer my own question, I finally found a solution which involves using the DwmGetWindowAttribute function together with the DWMWA_EXTENDED_FRAME_BOUNDS value

答案的灵感来自于这个来源$ C ​​$ C 其中presents功能，似乎工作的所有系统。其核心是一个功能

The answer was inspired by this source code which presents a function that seems to work on all system. The core is a function

public static Rectangle GetWindowRectangle(IntPtr handle)
{
    if (Environment.OSVersion.Version.Major < 6)
    {
        return GetWindowRect(handle);
    }
    else
    {
        Rectangle rectangle;
        return DWMWA_EXTENDED_FRAME_BOUNDS(handle, out rectangle) 
                   ? rectangle 
                   : GetWindowRect(handle);
    }
}

下面是的code 的全引擎收录。