.NET (C#):当您只有进程句柄或 PID 时获取子窗口? [英] .NET (C#): Getting child windows when you only have a process handle or PID?

问题描述

一种特殊情况的问题:

• 我使用 System.Diagnostics.Process.Start(..)
启动一个进程
• 该过程会打开一个闪屏——这个闪屏成为主窗口.
• 启动画面关闭并显示真实"用户界面.主窗口(启动画面)现在无效.
• 我还有 Process 对象，我可以查询它的句柄、模块等.但主窗口句柄现在无效.

此时我需要获取进程的 UI(或 UI 句柄).假设我无法更改流程的行为以使其更容易(或更理智).

我在网上环顾四周，但我承认我没有找一个多小时.看起来应该有点微不足道:-(

解决方案

如果你不介意使用 Windows API，你可以使用 EnumWindowsProc，并使用 GetWindowThreadProcessId(以查看它是否在您的进程中)，以及然后也许 IsWindowVisible、GetWindowCaption 和 GetWindowTextLength 来确定您的进程中的哪个 hWnd 是您想要的.>

尽管如果您之前没有使用过这些功能，那么这种方法将是一个真正的痛苦，所以希望有一种更简单的方法.

Kind of a special case problem:

• I start a process with System.Diagnostics.Process.Start(..)
• The process opens a splash screen -- this splash screen becomes the main window.
• The splash screen closes and the 'real' UI is shown. The main window (splash screen) is now invalid.
• I still have the Process object, and I can query its handle, module, etc. But the main window handle is now invalid.

I need to get the process's UI (or UI handle) at this point. Assume I cannot change the behavior of the process to make this any easier (or saner).

I have looked around online but I'll admit I didn't look for more than an hour. Seemed like it should be somewhat trivial :-(

解决方案

If you don't mind using the Windows API, you could use EnumWindowsProc, and check each of the handles that that turns up using GetWindowThreadProcessId (to see that it's in your process), and then maybe IsWindowVisible, GetWindowCaption and GetWindowTextLength to determine which hWnd in your process is the one you want.

Though if you haven't used those functions before that approach will be a real pain, so hopefully there's a simpler way.

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