Visual Basic P-code support

[XVilka]

P-Code is a name for several of Microsoft's proprietary intermediate languages. They provided an alternate binary format to machine code. At various times, Microsoft have said p-code is an abbreviation for either packed code[1] or pseudo code.[2]

Microsoft p-code was used in Visual C++ and Visual Basic. Like other p-code implementations, Microsoft p-code enabled a more compact executable at the expense of slower execution.

https://decoded.avast.io/davidzimmer/vb6-p-code-disassembly/

• VB Runtime with symbols
• A closer look at the VB6 For Loop implementation
• Introducing a one byte NOP opcode
• Semi-VBDecompiler

[moste00]

Hello, I'm trying my hand at an initial implementation of this. Just saying here to avoid races and duplicated work.