command line argument

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VC6

C++

What is the technique for getting output using command line argument through vc++


here in following program that is:

#include "stdio.h"
main ( int argc, char *argv[ ] )
{
FILE *fs, *ft ;
char ch ;
if ( argc != 3 )
{
puts ( "Improper number of arguments" ) ;
exit( ) ;
}
fs = fopen ( argv[1], "r" ) ;
if ( fs == NULL )
{
puts ( "Cannot open source file" ) ;
exit( ) ;
}
ft = fopen ( argv[2], "w" ) ;
if ( ft == NULL )
{
puts ( "Cannot open target file" ) ;
fclose ( fs ) ;
exit( ) ;
}
while ( 1 )
{
ch = fgetc ( fs ) ;
if ( ch == EOF )
break ;
else
fputc ( ch, ft ) ;
}
fclose ( fs ) ;
fclose ( ft ) ;
}

when i run in vc++ compiler it always show to me about that "Improper number of arguments".
but how i will run through command prompt to copy one file to another, as it always shows the following statement.

is there any mistake i have.
plz tell me.....