Hiding command prompt while starting a process in C++

Question

I have to start a process from my C++ code. I am using CreateProcess() function and I have set the following flags in the startupinfo struct. But still the command prompt shows up which I have to close manually to proceed. Please tell me how I can hide this command prompt during th e start up of the process.

si.cb = sizeof(STARTUPINFO);
    si.dwFlags = STARTF_USESHOWWINDOW;
    si.wShowWindow = SW_HIDE;

the create process call looks like this:

CreateProcess( NULL,   // No module name (use command line)
        exe,            // Command line
        NULL,           // Process handle not inheritable
        NULL,           // Thread handle not inheritable
        FALSE,          // Set handle inheritance to FALSE
        CREATE_NEW_CONSOLE,              // No creation flags
        NULL,           // Use parent's environment block
        NULL,           // Use parent's starting directory 
        &si,            // Pointer to STARTUPINFO structure
        &pi );

exe is a string containing the process name to start.

Please tell me how to hide this command prompt during start up of the process. I tried the method described here but it doesn't work. I have a Windows 7 system.

Thanks, Rakesh.

Are you the author of the other program? If so, is the entry point main() or WinMain() ? — hmjd
– hmjd, Commented Sep 11, 2012 at 10:28
No, I am not the author of the other program, so I don't know which one of them is used. — Rakesh K
– Rakesh K, Commented Sep 11, 2012 at 10:34

rioki · Accepted Answer · 2012-09-11 11:03:02Z

1

As MSalters says, the CREATE_NEW_CONSOLE is not what you want. But you probably also want to pass CREATE_NO_WINDOW to the CreateProcess function. See the MSDN documentation on what you can pass to CreateProcess as flags.

answered Sep 11, 2012 at 11:03

rioki

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2 Comments

Rakesh K Over a year ago

I changed to CREATE_NO_WINDOW but still it doesn't solve my problem. Am I missing anything?

David Heffernan Over a year ago

CREATE_NO_WINDOW is enough. Sounds like the other program is creating the console with AllocConsole.

MSalters · Accepted Answer · 2012-09-11 10:49:45Z

1

You're passing CREATE_NEW_CONSOLE and you do NOT want a new console window. Seems like the answer is entirely obvious. Still, if the other process creates a console itself, then you cant prevent it. What happens if you start that process via Explorer?

answered Sep 11, 2012 at 10:49

MSalters

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1 Comment

Rakesh K Over a year ago

The other process does not start any command prompt when started from explorer.

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