在 process.start() 之前设置进程窗口大小和位置

Question

我正在使用一个表单来启动新的 Flash 进程，使用 Process.start() 和 MoveWindow() 来调整进程窗口的大小和位置。问题是在调用 MoveWindow() 之前，您可以在一瞬间看到默认大小和位置的窗口。我想知道是否有办法在实际进程开始之前设置窗口的位置和大小。

Process flash = new Process();
flash.StartInfo.WindowStyle = ProcessWindowStyle.Normal;
flash.StartInfo.FileName = "C:\\RED\\bin\\android.swf";
flash.Start();
Thread.Sleep(300);
mainForm.MoveWindow(flash.MainWindowHandle, posX, 0, 1920, 1080, true);

Answer 1

使用CreateProcess。我同样需要为该职位创建另一个流程。

我已经定义了如下的 PInvoke。

public class Kernel32
{
    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct STARTUPINFO
    {
        public uint cb;
        public string lpReserved;
        public string lpDesktop;
        public string lpTitle;
        public uint dwX;
        public uint dwY;
        public uint dwXSize;
        public uint dwYSize;
        public uint dwXCountChars;
        public uint dwYCountChars;
        public uint dwFillAttribute;
        public uint dwFlags;
        public short wShowWindow;
        public short cbReserved2;
        public IntPtr lpReserved2;
        public IntPtr hStdInput;
        public IntPtr hStdOutput;
        public IntPtr hStdError;
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct PROCESS_INFORMATION
    {
        public IntPtr hProcess;
        public IntPtr hThread;
        public int dwProcessId;
        public int dwThreadId;
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct SECURITY_ATTRIBUTES
    {
        public int nLength;
        public IntPtr lpSecurityDescriptor;
        public int bInheritHandle;
    }

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct STARTUPINFOEX
    {
        public STARTUPINFO StartupInfo;
        public IntPtr lpAttributeList;
    }

    [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
    public static extern bool CreateProcess(
       string lpApplicationName,
       string lpCommandLine,
       ref SECURITY_ATTRIBUTES lpProcessAttributes,
       ref SECURITY_ATTRIBUTES lpThreadAttributes,
       bool bInheritHandles,
       uint dwCreationFlags,
       IntPtr lpEnvironment,
       string lpCurrentDirectory,
       [In] ref STARTUPINFO lpStartupInfo,
       out PROCESS_INFORMATION lpProcessInformation);
}

并像下面这样使用它。

const uint NORMAL_PRIORITY_CLASS = 0x0020;
const uint CREATE_UNICODE_ENVIRONMENT = 0x0400;
const uint STARTF_USESHOWWINDOW = 0x0001;
var pInfo = new Kernel32.PROCESS_INFORMATION();
var sInfo = new Kernel32.STARTUPINFO();
sInfo.dwX = (uint)hostingApp.X; // X Position 
sInfo.dwY = (uint)hostingApp.Y; // Y Position 
sInfo.dwXSize = (uint)hostingApp.Width; // Width
sInfo.dwYSize = (uint)hostingApp.Height; // Height
sInfo.dwFlags = STARTF_USESHOWWINDOW;
var pSec = new Kernel32.SECURITY_ATTRIBUTES();
var tSec = new Kernel32.SECURITY_ATTRIBUTES();
pSec.nLength = System.Runtime.InteropServices.Marshal.SizeOf(pSec);
tSec.nLength = System.Runtime.InteropServices.Marshal.SizeOf(tSec);

    var create_result = Kernel32.CreateProcess(
        fileName,                   // lpApplicationName
        " " + arguments,            // lpCommandLine
        ref pSec,                   // lpProcessAttributes
        ref tSec,                   // lpThreadAttributes
        false,                      // bInheritHandles
        NORMAL_PRIORITY_CLASS | CREATE_UNICODE_ENVIRONMENT,      // dwCreationFlags
        IntPtr.Zero,                // lpEnvironment
        null,                       // lpCurrentDirectory
        ref sInfo,                  // lpStartupInfo
        out pInfo);                 // lpProcessInformation


    var process = Process.GetProcessById(pInfo.dwProcessId);

希望这会有所帮助。

Answer 2

查看ProcessStartInfo.WindowStyle。您应该能够将其设置为以 Hidden 开头，直到您移动并调整其大小，然后将其恢复正常。

见here:

隐藏的窗口样式。窗口可以是可见的，也可以是隐藏的。系统通过不绘制它来显示一个隐藏的窗口。如果一个窗口被隐藏，它实际上是被禁用的。隐藏窗口可以处理来自系统或其他窗口的消息，但它不能处理来自用户的输入或显示输出。通常，应用程序可能会在自定义窗口外观时隐藏新窗口，然后将窗口样式设置为 Normal。要使用 ProcessWindowStyle.Hidden，ProcessStartInfo.UseShellExecute 属性必须为 false。

流程开始后如何更改样式，请看这个问题：

Toggle Process.StartInfo.WindowStyle = ProcessWindowStyle.Hidden at runtime