我如何管理 windows 使用 Win32 API 打开的应用程序（记事本、Word、Outlook、Chrome 等）

Question

我们如何管理我们运行使用 Win32 api 的应用程序的 wndproc 函数？我使用的软件语言是Go

我试了不止一种方法都做不到。你能帮忙吗？

I am learning the HANDLE (HWND) value of notepad application with Microsoft Spy ++

Then I watch the changes on Notepad ++ over SPY ++.

就像Spy++一样，请帮我管理一下我写的自定义WNPROC函数。

func main() {

    hwnd := w32.HWND(3736818)
    go SetWindowLongTest(w32.HWND(hwnd))
    time.Sleep(99999 * time.Second)
}


func SetWindowLongTest(hwnd w32.HWND) {
    result, err := win.SetWindowLongPtr(win.HWND(hwnd), win.GWL_WNDPROC, syscall.NewCallback(MyNewWndProc))
    if err != nil {
        fmt.Println("SetWindowLongPtr", err)
    }
    fmt.Println(result)
}



func MyNewWndProc(hwnd w32.HWND, uMsg uint, wParam w32.WPARAM, lParam w32.LPARAM) uintptr {
    fmt.Println(uMsg)
    fmt.Println("myNewWndProc", hwnd)
    return 0
}

  Result: 
    PS C:\Users\Cingozr\go\src> go run .\main.go
    SetWindowLongPtr Access is denied.
    0

方法二：

func main() {

    hwnd := w32.HWND(3736818)
    go SetClassLongTest(w32.HWND(hwnd))
    time.Sleep(99999 * time.Second)
}

func SetClassLongTest(hwnd w32.HWND) {
    result, err := w32.SetClassLongPtrW(hwnd, -24, syscall.NewCallback(MyNewWndProc))
    if err != nil {
        fmt.Println("SetClassLongPtrW Err", err)
    }
    fmt.Println("SetClassLongPtrW", result)

}

func MyNewWndProc(hwnd w32.HWND, uMsg uint, wParam w32.WPARAM, lParam w32.LPARAM) uintptr {
    fmt.Println(uMsg)
    fmt.Println("myNewWndProc", hwnd)
    return 0
}

Result:
PS C:\Users\Cingozr\go\src> go run .\main.go
SetClassLongPtrW Err Access is denied.
SetClassLongPtrW 0

Answer 1

答案是您不能将 window 过程 cross-process 替换为 SetWindowLongPtr 并且 SetClassLongPtr.

Calling SetWindowLongPtr with the GWLP_WNDPROC index creates a subclass of the window class used to create the window. An application can subclass a system class, but should not subclass a window class created by another process.

Calling SetClassLongPtr with the GCLP_WNDPROC index creates a subclass of the window class that affects all windows subsequently created with the class. An application can subclass a system class, but should not subclass a window class created by another process.

另外，SetWindowLongPtr的hwnd参数也有UIPI限制：

The SetWindowLongPtr function fails if the process that owns the window specified by the hWnd parameter is at a higher process privilege in the UIPI hierarchy than the process the calling thread resides in.

Windows XP/2000: The SetWindowLongPtr function fails if the window specified by the hWnd parameter does not belong to the same process as the calling thread.

如果要监控window条消息，建议使用SetWindowsHookEx。您可以阅读此文档：Using Hooks

您也可以 create your own window，使用相同的 WNDCLASSEX（目标中的 GetClassLongPtr window）和样式（目标中的 GetWindowLongPtr window）。

或者你已经知道自己在做什么，试试dll注入。

我如何管理 windows 使用 Win32 API 打开的应用程序（记事本、Word、Outlook、Chrome 等）

How can I manage windows of applications opened using Win32 API (Notepad, Word, Outlook, Chrome etc.)

hook

winapi

go

win32-process

setwindowlong