如何获取hWnd的窗口打开ShellExecuteEx .. hProcess？

问题描述

这个简单的问题似乎充满了侧面的问题。

eg。新进程是否打开多个窗口;它有闪屏吗？

有简单的方法吗？ （我正在开始一个新的Notepad ++实例）

This "simple" issue seems to be fraught with side issues.
eg. Does the new process open multiple windows; Does it have a splash screen?
Is there a simple way? (I'm starting a new instance of Notepad++)

...
std::tstring  tstrNotepad_exe = tstrProgramFiles + _T("\\Notepad++\\notepad++.exe");

SHELLEXECUTEINFO SEI={0};
sei.cbSize       = sizeof(SHELLEXECUTEINFO);
sei.fMask        = SEE_MASK_NOCLOSEPROCESS;
sei.hwnd         = hWndMe;  // This app's window handle
sei.lpVerb       = _T("open");
sei.lpFile       = tstrNotepad_exe.c_str();
sei.lpParameters = _T(" -multiInst -noPlugins -nosession -notabbar ";
sei.lpDirectory  = NULL;
sei.nShow        = SW_SHOW;
sei.hInstApp     = NULL;
if( ShellExecuteEx(&sei) )
{ // I have sei.hProcess, but how best to utilize it from here?
}
...

推荐答案

首先使用 WaitForInputIdle 暂停您的程序，直到应用程序启动并等待用户输入（主窗口应该已经创建），然后使用 EnumWindows 和 GetWindowThreadProcessId 以确定系统中的哪些窗口属于创建的进程。

First use WaitForInputIdle to pause your program until the application has started and is waiting for user input (the main window should have been created by then), then use EnumWindows and GetWindowThreadProcessId to determine which windows in the system belong to the created process.

例如：

struct ProcessWindowsInfo
{
    DWORD ProcessID;
    std::vector<HWND> Windows;

    ProcessWindowsInfo( DWORD const AProcessID )
        : ProcessID( AProcessID )
    {
    }
};

BOOL __stdcall EnumProcessWindowsProc( HWND hwnd, LPARAM lParam )
{
    ProcessWindowsInfo *Info = reinterpret_cast<ProcessWindowsInfo*>( lParam );
    DWORD WindowProcessID;

    GetWindowThreadProcessId( hwnd, &WindowProcessID );

    if( WindowProcessID == Info->ProcessID )
        Info->Windows.push_back( hwnd );

    return true;
}

....

if( ShellExecuteEx(&sei) )
{
    WaitForInputIdle( sei.hProcess, INFINITE );

    ProcessWindowsInfo Info( GetProcessId( sei.hProcess ) );

    EnumWindows( (WNDENUMPROC)EnumProcessWindowsProc,
        reinterpret_cast<LPARAM>( &Info ) );

    // Use Info.Windows.....
}

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