MASM Naming Conventions

In MASM (Microsoft Assembler, for ia32 systems), specifying the C or STDCALL naming convention in PROC and PROTO statements preserves case sensitivity if no CASEMAP option exists. The MASM OPTION CASEMAP directive (and the command line option /C) also sets case sensitivity and overrides naming conventions specified within PROTO and PROC statements:

• CASEMAP: NONE (equivalent to /Cx) preserves the case of identifiers in PUBLIC, COMM, EXTERNDEF, EXTERN, PROTO, and PROC declarations.
• CASEMAP: NOTPUBLIC (equivalent to /Cp) preserves the case of all user identifiers; this is the default.
• CASEMAP: ALL (equivalent to /Cu) translates all identifiers to uppercase.