vmware detection

unsigned vmware(void)
{
__asm{
        mov eax, 0x564d5868
        mov cl, 0xa
        mov dx, 0x5658
        in eax, dx
        cmp ebx, 0
        jne matrix
        xor eax, eax
        ret
        matrix:
        mov eax, 1};
}
  if(vmware()) try