Commonly Used Routines for Null-terminated Strings

The null-terminated string handling routines cover several functional areas. Within these areas, some are used for the same purpose, the differences being whether or not they use a particular criteria in their calculations. The following tables list these routines by these functional areas:

Comparison
Case conversion
Modification
Sub-string
Copying

Where appropriate, the tables also provide columns indicating whether the routine is case-sensitive, uses the current locale, and/or supports multi-byte character sets.

Null-terminated string comparison routines

Routine	Case-sensitive	Uses locale settings	Supports MBCS
AnsiStrComp	yes	yes	yes
AnsiStrIComp	no	yes	yes
AnsiStrLComp	yes	yes	yes
AnsiStrLIComp	no	yes	yes
StrComp	yes	no	no
StrIComp	no	no	no
StrLComp	yes	no	no
StrLIComp	no	no	no

Null-terminated case conversion routines

Routine	Uses locale settings	Supports MBCS
AnsiStrLower	yes	yes
AnsiStrUpper	yes	yes
StrLower	no	no
StrUpper	no	no

String modification routines

Routine

StrCat

StrLCat

Sub-string routines

Routine	Case-sensitive	Supports MBCS
AnsiStrPos	yes	yes
AnsiStrScan	yes	yes
AnsiStrRScan	yes	yes
StrPos	yes	no
StrScan	yes	no
StrRScan	yes	no

Null-terminated string copying

Routine

StrCopy

StrLCopy

StrECopy

StrMove

StrPCopy

StrPLCopy