PVS-Studio warning V514 for ReactOS

VOID
GetDriveNameWithLetter(LPWSTR szText, UINT Length, WCHAR Drive)
{
  ...
  TempLength = LoadStringW(shell32_hInstance,
    IDS_DRIVE_FIXED, &szText[Length+1],
    (sizeof(szText)/sizeof(WCHAR))- Length - 2);
  ...
}

"sizeof(szText)/sizeof(WCHAR)" - the pointer size is divided by the WCHAR size. The programmer seems to have intended to do some different thing.

This suspicious code was found in ReactOS project by PVS-Studio static code analyzer.
Warning message is:
V514 Dividing sizeof a pointer 'sizeof (szText)' by another value. There is a probability of logical error presence. shell32 drive.c 126

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/