Access InStr() function to SQL Server equivalent

What is the SQL Server equivalent to Access InStr() function?

TargetField: String expression being searched
SearchValue: String expression being sought
StartPosition: Starting position for each search (optional)

Access SQL

InStr(TargetField, SearchValue)InStr(StartPosition, TargetField, SearchValue)

SQL Server

CHARINDEX(SearchValue, TargetField)CHARINDEX(SearchValue, TargetField, StartPosition)