How to run masm.exe under WinXP?
"masm.exe is not valid Win32 application"
help
i don't know version 6.1, but why don't you upgrade to the latest version?
Don't use MASM.EXE use ML.EXE. IIRC, MASM.EXE is a DOS application that just calls ML.EXE. And yes, get the MASM32 package which has ML.EXE v6.14.