1 /*header file*/ 2 #include 
     
       3  4 int main(int argc,TCHAR argv[]) 5 { 6     //file handle 7     HANDLE hFile; 8     DWORD dwWritten; 9     //char array ,store system dir10     TCHAR szSystemDir[MAX_PATH];11     //get system dir12     GetSystemDirectory(szSystemDir,MAX_PATH);13 14     //make file systemroot.txt15     hFile = CreateFile("systemroot.txt",16         GENERIC_WRITE,17     0,NULL,CREATE_ALWAYS,18     FILE_ATTRIBUTE_NORMAL,19     NULL);20     //IF the create file21     if(hFile != INVALID_HANDLE_VALUE)22     {23         //write the system dir info to file24         if(!WriteFile(hFile,szSystemDir,lstrlen(szSystemDir),&dwWritten,NULL))25         {26             return GetLastError();27         }28     }29     CloseHandle(hFile);30     return 0;31 32 }