Example 3

                 push    ebp
                 mov     ebp, esp
                 mov     eax, [ebp+arg_0]
                 test    eax, eax
                 jnz     short loc_1

                 push    57h             ; dwErrCode
                 call    ds:SetLastError
                 xor     eax, eax
                 pop     ebp
                 retn    8
 ; ---------------------------------------------------------------------------

 loc_1:
                 mov     cl, [eax]
                 test    cl, cl
                 jz      short loc_3
                 mov     dl, [ebp+arg_4]
                 jmp     short loc_2
 ; ---------------------------------------------------------------------------

 loc_2:
                 cmp     cl, dl
                 jz      short loc_4
                 mov     cl, [eax+1]
                 inc     eax
                 test    cl, cl
                 jnz     short loc_2

 loc_3:
                 xor     eax, eax

 loc_4:
                 pop     ebp
                 retn    8