unable to redirect output thro' system in windows

hello xperts,
this ? follows the link

https://www.experts-exchange.com/Programming/Programming_Languages/C/Q_20733105.html

the code i have is this....

#include<stdio.h>
#include<stdlib.h>
int main( void )
{
      int ret = -1;
      printf("Hello World.\n");
       
        ret = system("dir > c://test1.txt");
      printf(" my val is %d\n", ret);
      
      ret = system(" c:\\h1.exe > c:\\wierd");
      printf(" my val is %d\n", ret);
      
       ret = system(" c:\\h1.exe >> c:\\wierd.txt");
      printf(" my val is %d\n", ret);
      
      system("pause");
      system("cls");
//      getchar();
      printf("after");
      return 0;
}


Iam trying to execute the above code in  Windows
the thing is the re-direction is not happ.  via system
But the re-direction takes place when i try it manually in the command prompt
the return value of all the above statements is 0.
As SunnyCoder had suggested in dat link..  i did have a huge code where the system was present in an if
but since things werent happ. i tried out d above sample code.

BTW is it got to do with the Library's way of implementing dis function?
But since this is a part of ANSI C library stdlib.h  shudnt this be supported by all and shudnt the behavior be same
coz i  have tried dis out in *nix b4 and i have never encountered problems  like this

TIA
not_an_xpert :-(