How can I be notified when a new window is created on Win32?

问题

Is there a way using Win32, to register for notifications when a new window is created. I'm trying to keep a list of current open windows, but am now just polling the list of current windows using EnumWindows().

Anyone done something similar?

Thanks

I'm not sure if I'm doing this right, but I'm not able to get the SetWindowsHookEx method to fire.

anything come to mind?

here is my snip

[DllImport("user32.dll", SetLastError = true)]
private static extern IntPtr SetWindowsHookEx(HookType hook, HookProc callback, IntPtr hMod, uint dwThreadId);

[DllImport("user32.dll")]
private static extern int CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);
const int HSHELL_WINDOWCREATED = 1;

private static HookProc winDelegate = ShellHookProcDelegate;
internal static void RegisterWindowCreatedEvent()
{
    SetWindowsHookEx(HookType.WH_SHELL, winDelegate, IntPtr.Zero, 0);
}

private static int ShellHookProcDelegate(int code, IntPtr wParam, IntPtr lParam)
{
    if (code != HSHELL_WINDOWCREATED)
    {
        return CallNextHookEx(IntPtr.Zero, code, wParam, lParam);
    }

    //App specific code here

    return CallNextHookEx(IntPtr.Zero, code, wParam, lParam);
}

回答1:

Use SetWindowsHookEx to set up a WH_SHELL hook and look for the HSHELL_WINDOWCREATED event.

回答2:

Sure - you can write a CBT hook and watch for HCBT_CREATEWND. See also SetWindowsHookEx().

Note that this will allow you to be notified of all window creation, before the windows being created are even fully initialized. If all you need are unowned, top-level windows, RichieHindle's suggestion may work better...

回答3:

Detours will permit you to attach hooks to arbitrary Win32 functions. However, polling is probably a more reliable way to approach the problem: you don't have to worry about whether you've missed a particular window-creation method (how many are there in Win32? I bet more than one!), and, of course, you won't be rewriting the machine code for windows functions at runtime.

But, you know, your call.

回答4:

You could try WinEventHook library for autohotkey. Try modifying the notepad popup blocker example with the following:

HookProc( hWinEventHook, Event, hWnd, idObject, idChild, dwEventThread, dwmsEventTime ) { if Event ; EVENT_SYSTEM_FOREGROUND = 0x3 { WinGetTitle, title, ahk_id %hWnd% If (title = "your_window_name" msgbox, your window has been created } }

来源：https://stackoverflow.com/questions/1024756/how-can-i-be-notified-when-a-new-window-is-created-on-win32

标签

winapi

user32