FAQ : running program inside program (spawn)

Hi,
I am trying to use "spawn" function and/or "system()". I was successfull in running "system()" but I always had to put the child program at a specific location (I do not know how to change path to point to the location of child program). So I then switched to using "spawn()".
I am usig pretty simple arguments and settings and yet I get the error "Invalid Argument " (when I use perror). Please have a look at code below and if someone can tell me why?. I have tried several permuations and referred documentation in VC++ help as well but I can't seem to figure out right now
Note: child program = "test_system.exe"
Code:

Code:

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char mode[]="_P_WAIT";
        char path[]="C:\test_system.exe";
        char path1[]="sdfor.exe";
        char args[]="NULL";
        //char path[]="test_system\test_system.exe";
        printf("STart exe file\n");
        i=spawnlp(mode,path,"test_system.exe",NULL);
        perror("The message for error\n");
        printf("%d",i);
        printf("End of exe file\n");

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I hope I have used code tags the right way if not please let me know and I will repost


Thanks
Nipun

Go read the manual page for spawnlp again, and pay attention to all warning messages.

The first parameter should be just _P_WAIT
Not a pointer to a string containing "_P_WAIT"

Thanks for the reply Salem,
However that was not the only problem. I admit I didn't pay attention to mode and assumed it to be asking pointer to string. But more important is this observation which might help others who are new to using "spawn"
My path file contained(if one sees in the code i posted above) C:\dir1\file.exe in my case it is
C:\test_system\test_system.exe

so it take "\t " as a tab and not as '\t' I rectified it by putting
C:\\test_system\\test_system.exe and ofcourse _P_WAIT instead of "_P_WAIT"

Hope this helps some other people as well
Nipun

> so it take "\t " as a tab and not as '\t' I rectified it by putting
Well yes, that's just normal 'C' quoting mechanism for escape characters in any string, nothing peculiar to strings being passed to spawn