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
    UINT32 SafeMultiply(UINT32 a, UINT32 b)
    {
        UINT64 result = (UINT64)a * b;
        if (result > UINT32_MAX)
            return 0;
        return (UINT32)result;
    }

    UINT32 dstSize = SafeMultiply(nHeight, nDstStep);
    UINT32 srcSize = SafeMultiply(nHeight, nSrcStep);

    if (dstSize == 0 || srcSize == 0)
        return FALSE;

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

    return FALSE;
}
```

5. Using a macro for safe multiplication:

```c
    #define SAFE_MULTIPLY(a, b, result) \
        do { \
            UINT64 tmp = (UINT64)(a) * (b); \
            if (tmp > UINT32_MAX) { \
                return FALSE; \
            } \
            result = (UINT32)tmp; \
        } while (0)

    UINT32 dstSize, srcSize;
    SAFE_MULTIPLY(nHeight, nDstStep, dstSize);
    SAFE_MULTIPLY(nHeight, nSrcStep, srcSize);

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

    return FALSE;
}
```