C＃ - user32.dll中 - GetWindowRect问题 [英] C# - user32.dll - GetWindowRect problem

问题描述

[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool GetWindowRect(HandleRef hWnd, out RECT lpRect);

[StructLayout(LayoutKind.Sequential)]
public struct RECT
{
    public int Left;        // x position of upper-left corner
    public int Top;         // y position of upper-left corner
    public int Right;       // x position of lower-right corner
    public int Bottom;      // y position of lower-right corner
}

foreach (Process pr in Process.GetProcesses())
{
    RECT rc;
    GetWindowRect(???, out rc);

我应该把为???？ 。它告诉我，我必须把一个HandleRef对象，但我不知道如何从工艺方法HandleRef对象。

What should I put for " ??? " ? . It tells me I have to put a HandleRef object but I do not know how to get HandleRef object from Process method.

推荐答案

如果你需要一个窗口，在过程窗口坐标已经有其他方式获得，不需要枚举进程的窗口句柄。

If you need window coordinates for a window already in your process, there are other ways to get a window handle that don't require enumerating processes.

有关的WinForms窗口，使用处理属性。

For WinForms windows, use the Handle property.

的 System.Windows.Forms.Control的... handle属性@ MSDN

有关WPF应用程序，使用 WindowInteropHelper

For WPF applications, use WindowInteropHelper

的System.Windows.Interop ... WindowInteropHelper类@ MSDN

如果你是试图枚举你不能直接从.NET访问窗口;从创建一个顶级窗口出你的代码的范围第三方控制说，你可能希望通过在Win32 EnumWindows的函数来枚举。

If you are trying to enumerate windows that you aren't able to access directly from .NET; say from a 3rd party control that creates a top-level window out of scope of your code, you may wish to enumerate via the win32 EnumWindows function.

EnumWindows的（Win32的）@ MSDN

签名的p / Invoke的EnumWindows的都可以在这里：

Signatures for P/Invoke for EnumWindows are available here:

的的User32.dll EnumWindows的@ pinvoke.net

补充：

看起来像要列举所有的窗户和放大器;相关进程。使用 EnumWindows的，然后调用 GetWindowThreadProcessId 来获得相关的过程和放大器;每个窗口非托管线程ID。

Looks like you want to enumerate all the windows & associated processes. Use EnumWindows, then call GetWindowThreadProcessId to get the associated Process & Unmanaged Thread ID for each window.

的 GetWindowThreadProcessId的（Win32）@ MSDN

的p / Invoke签名，请访问：

The P/Invoke signature is available here:

的User32.dll GetWindowThreadProcessId @ pinvoke.net

最后，你就可以用静态方法 GetProcessById A Process对象。

Last, you can get a Process object via the static method GetProcessById.

<一个HREF =http://msdn.microsoft.com/en-us/library/system.diagnostics.process.getprocessbyid%28v=VS.100%29.aspx> Process.GetProcessById @ MSDN

添加（＃2）：

下面是一个可以枚举窗口很短的控制台程序，过程和放大器;线程ID。有您的片段有一些区别。

Here's a short console program that can enumerate windows, process & thread ids. There are a few differences from your snippet.

1. 我使用的IntPtr，不是HandleRef。正如其他人所指出的，这可能会产生混淆的东西给你。


2. 我没有指定收益属性。如果这是必需的，你应该能够重新添加在


3. 我以管理员身份运行。有些事情可能，如果你是用户级权限运行运行不同

1. I use IntPtr, not HandleRef. As other people have pointed out, this may be confusing things for you.
2. I didn't specify a return attribute. If this is required, you should be able to add it back in.
3. I'm running as administrator; some things may run differently for you if you are running with user-level privileges.

的 C＃源代码示例@ gist.github

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