В чем 2 ошибки ?

#include <windows.h>
#include <string.h>

BOOL WINAPI DllMain(
HINSTANCE hinstDLL,
DWORD fdwReason,
LPVOID lpReserved)
{

switch(fdwReason)
{
case DLL_PROCESS_ATTACH:
break;
case DLL_THREAD_ATTACH:
break;
case DLL_THREAD_DETACH:
break;
case DLL_PROCESS_DETACH:
break;
}
return TRUE;
}


int _stdcall NUM(
SAFEARRAY **sfstrng,
int M)
{
double x;
int sum=0,
i;
SAFEARRAY *strng;
char **str,
*end;

if(!sfstrng)
return -1;
strng= *sfstrng;
if(!strng)
return -1;
str=(char **)strng->pvData;

for(i=0;i<=M-1;i++)
{
if(strlen(str)>0)
{
x=strtod(str,&end);
if(!(*end))
sum++;
}
}
return sum;
}

В чем 2 ошибки :???: