CreateProcess doesn't pass command line arguments

Question

Hello I have the following code but it isn\'t working as expected, can\'t figure out what the problem is.

Basically, I\'m executing a process (a .NET process) and pa

Answer 1

If the first parameter to CreateProcess() is non-NULL, it will use that to locate the image to launch.

If it is NULL, it will parser the 2nd argument to try to get the executable to launch from the 1st token.

In either case, the C runtime will use the second argument to populate the argv array. So the first token from that parameter shows up in argv[0].

You probably want something like the following (I've change the smtp.exe program to echoargs.exe - a simple utility I have to help figure out just this kind of issue):

int main(int argc, char* argv[])
{
    PROCESS_INFORMATION ProcessInfo; //This is what we get as an [out] parameter

    STARTUPINFO StartupInfo; //This is an [in] parameter
    char cmdArgs[] = "echoargs.exe name@example.com";

    ZeroMemory(&StartupInfo, sizeof(StartupInfo));
    StartupInfo.cb = sizeof StartupInfo ; //Only compulsory field


    if(CreateProcess("C:\\util\\echoargs.exe", cmdArgs, 
        NULL,NULL,FALSE,0,NULL,
        NULL,&StartupInfo,&ProcessInfo))
    { 
        WaitForSingleObject(ProcessInfo.hProcess,INFINITE);
        CloseHandle(ProcessInfo.hThread);
        CloseHandle(ProcessInfo.hProcess);

        printf("Yohoo!");
    }  
    else
    {
        printf("The process could not be started...");
    }

    return 0;
}

Here's the output I get from that program:

echoargs.exe name@example.com
[0]: echoargs.exe
[1]: name@example.com

Yohoo!