Go/Golang Trying to get window information via syscall. (As in EnumWindows, etc.)

Question

Thanks for reading and any comments you may have.

Context:

• I've been a UI/R&D dev (prototyping, etc.) for over 20 years and just started server/backend development.
• I'm very new to Go - less than 2 months - and have 1) run through much of GoByExample and 2) set up a primitive, working web server on an Amazon EC2 instance.
• I created a UI in another language which serves a HUD (Heads Up Display) for another 3rd party application - a game which spawns multiple windows. (Think multiple poker tables running in multiple windows.)
• I connected the HUD to a Go client I created.
• I use Go to grab OS information because of limitations in the first language.
• I want to continue to use Go because I really enjoy it.
• I'm on a Windows 7 machine.

Goal(s):

• Big picture: When a User moves a window, I want the HUD to move with it.
• To do this I need information about the main windows whos WindowText starts with "Game".

• The ideal would be something like this:

  windows: [ { windowHwnd:hwnd, windowText:windowText, windowX:x, windowY:y, windowWidth:width, windowHeight:height },
  .
  .
  .
  { windowHwnd:hwnd, windowText:windowText, windowX:x, windowY:y, windowWidth:width, windowHeight:height } ]
  

Steps I've taken:

• I've grabbed and modified github.com/AllenDang/w32 which I think formats syscall for Go.
  • When I need an unlisted function from user32.go, I add it.
• Tried using GetForegroundWindow and GetWindowText with result, then GetWindow( hwnd, previous ) to just walkthrough everything
• Read through:
  • syscall docs (http://golang.org/pkg/syscall/)
  • syscall/dll_windows.go
  • syscall/env_windows.go
  • syscall/exec_windows.go
  • syscall/syscall.go
  • syscall/syscall_windows.go
  • syscall/syscall_windows_386.go
  • syscall/syscall_windows_amd86.go
  • syscall/syscall_windows_test.go
  • syscall/zsyscall_windows_386.go
  • syscall/zsyscall_windows_amd86.go
  • syscall/ztypes_windows.go
  • syscall/ztypes_windows_386.go
  • syscall/ztypes_windows_amd86.go
• Every potential Window Function at Windows Dev Center
• Searched StackExchange, Google, DuckDuckGo
• I can see there's something (TestEnumWindows)
  • line 125 in runtime/syscall_windows_test.go (http://golang.org/src/pkg/runtime/syscall_windows_test.go)
  • Though this function doesn't exist in syscall_windows_test.go

Questions:

• Better solution? In my ignorance I could easily be overlooking some method like: GiveGeoffreyExactlyWhatHeWants()
• Am I in the right ballpark?
• Is this doable in Go?
• What's the right direction to head?
• Is this something anybody else needs?

Answer 1

It is not clear what you want , but perhaps http://play.golang.org/p/YfGDtIuuBw will help. It uses EnumWindows to find window with a particular title.

Alex