Here are five possible code completions for the given function, addressing the CWE-190 vulnerability (Integer Overflow or Wraparound):

1. Using size_t for calculations and bounds checking:

```c
    size_t dstSize = (size_t)nHeight * nDstStep;
    size_t srcSize = (size_t)nHeight * nSrcStep;

    if (dstSize > SIZE_MAX || srcSize > SIZE_MAX)
        return FALSE;

    if ((pDstStart <= pSrcStart && pSrcStart < pDstEnd) ||
        (pSrcStart <= pDstStart && pDstStart < pSrcEnd))
        return TRUE;

    return FALSE;
}
```

2. Using UINT64 for calculations and checking for overflow:

```c
    UINT64 dstSize = (UINT64)nHeight * nDstStep;
    UINT64 srcSize = (UINT64)nHeight * nSrcStep;

    if (dstSize > UINT32_MAX || srcSize > UINT32_MAX)
        return FALSE;

    if ((pDstStart <= pSrcStart && pSrcStart < pDstEnd) ||
        (pSrcStart <= pDstStart && pDstStart < pSrcEnd))
        return TRUE;

    return FALSE;
}
```

3. Using separate checks for height and step:

```c
    if (nHeight > UINT32_MAX / nDstStep || nHeight > UINT32_MAX / nSrcStep)
        return FALSE;

    const BYTE* pDstEnd = pDstStart + nHeight * nDstStep;
    const BYTE* pSrcEnd = pSrcStart + nHeight * nSrcStep;

    if ((pDstStart <= pSrcStart && pSrcStart < pDstEnd) ||
        (pSrcStart <= pDstStart && pDstStart < pSrcEnd))
        return TRUE;

    return FALSE;
}
```

4. Using a helper function for safe multiplication:

```c
    BOOL SafeMultiply(UINT32 a, UINT32 b, UINT32* result) {
        return !__builtin_umul_overflow(a, b, result);
    }

    UINT32 dstSize, srcSize;
    if (!SafeMultiply(nHeight, nDstStep, &dstSize) || !SafeMultiply(nHeight, nSrcStep, &srcSize))
        return FALSE;

    const BYTE* pDstEnd = pDstStart + dstSize;
    const BYTE* pSrcEnd = pSrcStart + srcSize;

    if ((pDstStart <= pSrcStart && pSrcStart < pDstEnd) ||
        (pSrcStart <= pDstStart && pDstStart < pSrcEnd))
        return TRUE;

    return FALSE;
}
```

5. Using a more conservative approach with additional checks:

```c
    if (nHeight == 0 || nDstStep == 0 || nSrcStep == 0)
        return FALSE;

    if (nHeight > UINT32_MAX / nDstStep || nHeight > UINT32_MAX / nSrcStep)
        return FALSE;

    UINT32 dstSize = nHeight * nDstStep;
    UINT32 srcSize = nHeight * nSrcStep;

    if (pDstStart + dstSize < pDstStart || pSrcStart + srcSize < pSrcStart)
        return FALSE;

    if ((pDstStart <= pSrcStart && pSrcStart < pDstStart + dstSize) ||
        (pSrcStart <= pDstStart && pDstStart < pSrcStart + srcSize))
        return TRUE;

    return FALSE;
}
```