I think it would be useful to have a syntax highlighting file that would paint
-- all BASIC keywords in bold dark blue/navy (Dim, Long, String, Sub, Function, For/To/Step/Next, If/Then/Else/End If, While/Wend, etc.)
-- all C-style and C-like keywords in bold light orange (char, int, float, sizeof, typeof, etc.)
-- all assembly keywords/mnemonics in bold red (add, jmp, ecx, rbx, shr, cmp, ret, etc.)
-- all preprocessor metastatements in bold dark grey/#808080 (#define, #include, #ifdef, #endif, #undef, #autodim, #lookahead, etc.)
-- all single-line and block comments in bold italicized green (/* it's a comment */, // it's a comment, ' it's a comment)
-- all strings in bold light brown/maroon ("it's a string").
And if the editor cannot support that many keyword groups and colors, or if it doesn't support several concurrent formats of comments and/or block comments, or if it doesn't support bold and/or italicized font concurrently with normal text, then go find another editor or develop one.