Program to run automatically in c

hi friends,
How will the path inside the '\' before again add.
thanks.

Codes:

Code:

#include<stdio.h>
void main(int argc,char *argv[])
{
     char *appPath=argv[0]; /*How will the path inside the '\' before again add '\' */
     HKEY hKey;
     RegCreateKeyEx(
            HKEY_LOCAL_MACHINE,
            "Software\\Microsoft\\Windows\\CurrentVersion\\Run",
      0,
      NULL,
      REG_OPTION_NON_VOLATILE,
     KEY_ALL_ACCESS,
      NULL,
      &hKey,
      0);
    RegSetValueExA(
     hKey,
     "this demo",
    0,
     REG_SZ,
    (CONST BYTE*) appPath,
     50);
    RegCloseKey(hKey);
}

 

I don't understand the question. It makes no sense in English. Could you rephrase it?