Yep, that was the problem. Thanks!

But like I expected there is still another problem with using sscanf_s.

In Dev-Cpp the following Code worked:

DLLFUNC void string_test()
{
char buffer[50];
short reseiver;

sprintf_s(buffer,50,"%d",10);
sscanf_s(buffer,"%d",&reseiver);
}

But if I use this function in GS i get this runtime error:
Debug Error!

Run-Time Check Failure #2 - Stack around the variable 'reseiver' was corrupted.

What am I doing wrong?

[edit]I found out that this problem only occurs in a dll. If I build the whole thing as console application everything works. Maybe some settings are affecting this.

Dark_Samurai