Jinoh Kang (@iamahuman) commented about dlls/comctl32/commctrl.c:
while (ichCurrent && IsDelimiter(lpch[ichCurrent - 1]))
ichCurrent--;
/* skip word */
while (ichCurrent && !IsDelimiter(lpch[ichCurrent - 1]))
ichCurrent--;
/* special case: if there's a single leading delimiter, skip it */
if (ichCurrent == 1 && IsDelimiter(lpch[ichCurrent - 1]))
ichCurrent--;
ret = ichCurrent;
break;
case WB_RIGHT:
if (!lpch || ichCurrent < 0 || ichCurrent > cch)
{
if (cch > ret)
ret = cch;
```suggestion:-1+0 ret = cch; ```