Setting process window size and location before process.start()

Question

I am using a form to start new flash processes using Process.start() and MoveWindow() to resize and change the process window location. The problem is before MoveWindow() is cal

Answer 1

Use CreateProcess. I had a same need for creating another process with the position.

I have defined the PInvoke like below.

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);
}

And use it like below.

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);

Hope this helps.