Hi Tye, Yes, You are correct. Thanks. We have to copy the string (using XPUSH) into perl stack. Our problem will be like this, we have to call the perl subroutine with some 200 to 300 string of huge size during every invocation. Please see the below C code used to call the perl subroutine.

please note that the macros are not in the order.
dSP;
SAVETEMPS;
PUSKMARK;
XPUSHs(SV equivalent for the First string);
XPUSHs(SV equivalent for the second string);
:
:
:
XPUSHs(SV equivalent for the Nth string);
call_pv("pkg1::Process",G_SCALAR);
something goes here
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If we have something like passing the address of the strings as in the C calls

void Process(char *p)
{
 // some processing
}

main()
{
char Str[500];
strcpy(Str,"slkdjaslkdjsljdlkjas");
Process(&Str);
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Is there any way to push the address of the string using XPUSHs() and that string can be used by the perl script?. Regards, Poorna