string s1,s2;
int pos;
s1="c:\\abc\\aaa.exe\0\0\0\0\0\0\0\0\0\0\0\0\0";
pos=s1.indexof("\0");
s2=s1.substring(0,pos+1);
int pos;
s1="c:\\abc\\aaa.exe\0\0\0\0\0\0\0\0\0\0\0\0\0";
pos=s1.indexof("\0");
s2=s1.substring(0,pos+1);
string b=".exe";
int c;
c=a.IndexOf(b);a=a.Remove(c+4,a.Length()-c-4);