For the upcoming Starcraft© Guardian™ banlist (1.16.21), I intend to (in addition to entering text) have a convenient option to blacklist a player by the menu underneath the associated game slot. There's a quick dirty way to do this, of course. Hooking 0041AF10, then adding a reference to your string at (*(dword)(ecx + 3Ah) + *(byte *)(ecx + 46h)).
But this requires hooking, which is ugly, and even worse, would cause StarCraft to fail CheckRevision.
 
I refuse to use this 'solution' as it lowers my standards of quality software.
Instead, I am currently trying to figure out how to add a menu item by calling 0041B760h but it requires the construction of that struct i mentioned (Since it's passed via ecx like a thiscall, it's probably a reference to 'this').
Interestingly, this is the same function that inserts a line of text into the game lobby chatbox.
 
So far I've documented a bit of it:

word 0h   = unknown, maybe reference ID?
word 2h   = x
word 4h   = cx
word 6h   = y
word 8h   = cy
word Ah   = unknown, variable val, maybe this has something to do with the y?
word Ch   = unknown, constant 0xA000 though
word Eh   = unknown, constant 0x10 though
dword 10h = unknown, 0
dword 14h = unknown, 0
dword 18h = Flags, currently A0020411h
dword 1Ch = unknown, 0
word 20h  = unknown, variable, smallish value (35 - 63)
word 22h  = unknown, constant 13
word 24h  = unknown, constant 1
word 26h  = unknown, variable, higher order byte seems > than lower order (are these bytes?)
word 28h  =
dword 3Ah = Pointer to the string table of the current menu
byte 46h = current menu slot being referenced
byte 47h = upper bound of slots #s?
byte 4Ch = direction of menu drawing (always 0, for backwards draw)

 
I'm hesitant on calling it because I _don't_ know what the majority of these members actually are.
Anyone else feel like looking into it and contributing?

This.... is simply amazing. I don't know what else to say.
Thank you so much, you're probably the best resource I'll ever encounter.
Are you the main contributor to that google code project?
 
The storm function listing really helps out too. So, I guess that's why I could never ban the players, because i was just dropping them instead! (I was doing Ordinal106(slotindex, 3), and i gave it the misnomer of SNetIssueCommand)
 
Also no, that's a whoops on my part. I thought the current version was 1.16.2 *shrug*

I recently created a dialog class.
  See   http://code.google.com/p/bwapi/source/browse/trunk/bwapi/BWAPI/Source/BW/Dialog.h
 
  It can be detached from the project's code easily. There are 4 offsets   required, no hooks. You can create dialogs and controls, including two   premade dialogs, a "window"(movable with title/minimize/close), and a   "canvas"(alternative to drawing hooks). I've created a function that can   draw text to a bitmap surface as well (for the canvas, but can have   other uses).
 
  It's too bad I didn't make this sooner, I don't know if you still plan   to do this or not.