如何在 C# 中使用 GetNextWindow()？
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How can I use GetNextWindow() in C#?
提问by Timwi
The Microsoft WinAPI documentation appears to suggest that user32.dll contains a function called GetNextWindow()which supposedly allows one to enumerate open windows in their Z order by calling this function repeatedly.
Microsoft WinAPI 文档似乎表明 user32.dll 包含一个被调用的函数GetNextWindow()，据称该函数允许通过重复调用此函数以 Z 顺序枚举打开的窗口。
Pinvokeusually gives me the necessary DllImportstatement to use WinAPI functions from C#. However, for GetNextWindow()it doesn't have an entry. So I tried to construct my own:
Pinvoke通常会为我DllImport提供使用 C# 中的 WinAPI 函数的必要语句。但是，因为GetNextWindow()它没有条目。所以我尝试构建自己的：
[DllImport("user32.dll")]
static extern IntPtr GetNextWindow(IntPtr hWnd, uint wCmd);
Unfortunately, when trying to call this, I get an EntryPointNotFoundExceptionsaying:
不幸的是，当试图调用它时，我得到了一个EntryPointNotFoundException说法：
Unable to find an entry point named 'GetNextWindow' in DLL 'user32.dll'.
This seems to apply only to GetNextWindow(); other functions that are listed on Pinvoke are fine. I can call GetTopWindow()and GetWindowText()without throwing an exception.
这似乎只适用于GetNextWindow(); Pinvoke 上列出的其他功能都很好。我可以调用GetTopWindow()并且GetWindowText()不会抛出异常。
Of course, if you can suggest a completely different way to enumerate windows in their current Z order, I'm happy to hear that too.
当然，如果您可以提出一种完全不同的方法来按当前 Z 顺序枚举窗口，我也很高兴听到这个消息。
采纳答案by David Brown
GetNextWindow()is actually a macro for GetWindow(), rather than an actual API method. It's for backward compatibility with the Win16 API.
GetNextWindow()实际上是GetWindow()的宏，而不是实际的 API 方法。它是为了与 Win16 API 向后兼容。
[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr GetWindow(IntPtr hWnd, uint uCmd);
enum GetWindow_Cmd : uint {
GW_HWNDFIRST = 0,
GW_HWNDLAST = 1,
GW_HWNDNEXT = 2,
GW_HWNDPREV = 3,
GW_OWNER = 4,
GW_CHILD = 5,
GW_ENABLEDPOPUP = 6
}
(From Pinvoke.net)
（来自Pinvoke.net）
回答by Richard Szalay
GetNextWindow is a c++ macro that calls GetWindow, so you cannot call it from .NET. Call GetWindow instead.
GetNextWindow 是一个调用 GetWindow 的 C++ 宏，因此您不能从 .NET 调用它。改为调用 GetWindow。
From MSDN:
从MSDN：
Using this function is the same as calling the GetWindow function with the GW_HWNDNEXT or GW_HWNDPREV flag set
使用此函数与调用设置了 GW_HWNDNEXT 或 GW_HWNDPREV 标志的 GetWindow 函数相同
