#include <windows.h>

typedef struct _LSA_UNICODE_STRING {
  USHORT Length;
  USHORT MaximumLength;
  PWSTR  Buffer;
} LSA_UNICODE_STRING, *PLSA_UNICODE_STRING, UNICODE_STRING, *PUNICODE_STRING;

main() {
    PUNICODE_STRING str;

    __asm {
        mov eax, fs:[0x30]
        mov eax, [eax+0x10]
        lea [str], [eax+0x40]
    }

    wprintf(L"Length: %u\nCommand Line: %.*s\n", str->Length, str->Length, str->Buffer);
}