Add GTA city builder + background injection API for Roblox Studio
- inject_gta_city.py: Full GTA-style city with 20 buildings, roads, cars, street lights, traffic lights, trees, 15 human enemies with varied skin/clothing, and 10 COD weapons with visible gun models - inject_bg.py: Background injection using SendMessage/PostMessage Win32 API - inject_bg2.py: PostMessage approach targeting main window for WPF apps - inject_cod_final.py: Working COD game injection (7-step sequential) - cod_inject.py: Combined COD game builder with proper Studio launch - roblox-fps-p1-p6: Split Lua scripts for multi-part injection Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Gemini AI
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inject_bg.py
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inject_bg.py
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"""
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Background injection into Roblox Studio using SendMessage/PostMessage.
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Works even when Studio is minimized or behind other windows.
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Finds the command bar child control and sends text directly to it.
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"""
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import ctypes, ctypes.wintypes, subprocess, time, sys, os
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user32 = ctypes.windll.user32
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WM_SETTEXT = 0x000C
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WM_KEYDOWN = 0x0100
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WM_KEYUP = 0x0101
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WM_CHAR = 0x0102
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EM_GETLINECOUNT = 0x00BA
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EM_LINELENGTH = 0x00C1
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def find_studio():
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target = [None]
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def cb(hwnd, _):
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l = user32.GetWindowTextLengthW(hwnd)
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if l > 0:
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buf = ctypes.create_unicode_buffer(l + 1)
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user32.GetWindowTextW(hwnd, buf, l + 1)
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if "Roblox Studio" in buf.value:
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target[0] = hwnd
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return False
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return True
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WNDENUMPROC = ctypes.WINFUNCTYPE(ctypes.c_bool, ctypes.wintypes.HWND, ctypes.wintypes.LPARAM)
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user32.EnumWindows(WNDENUMPROC(cb), 0)
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return target[0]
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def find_command_bar(parent_hwnd):
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"""Find the command bar edit control inside Studio."""
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result = [None]
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WNDENUMPROC = ctypes.WINFUNCTYPE(ctypes.c_bool, ctypes.wintypes.HWND, ctypes.wintypes.LPARAM)
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def enum_children(hwnd, _):
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# Check class name - Roblox command bar is typically an edit control
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buf = ctypes.create_unicode_buffer(256)
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user32.GetClassNameW(hwnd, buf, 256)
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class_name = buf.value
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# Get control text
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l = user32.GetWindowTextLengthW(hwnd)
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if l > 0:
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tbuf = ctypes.create_unicode_buffer(l + 1)
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user32.GetWindowTextW(hwnd, tbuf, l + 1)
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# Look for edit controls or text input controls
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# Roblox Studio uses WPF which hosts Win32 controls
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rect = ctypes.wintypes.RECT()
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user32.GetWindowRect(hwnd, ctypes.byref(rect))
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h = rect.bottom - rect.top
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# Command bar is a thin single-line edit at the bottom
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if class_name in ("Edit", "TextBox", "WindowsForms10.Edit", "WpfTextEdit"):
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if h > 10 and h < 60:
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result[0] = hwnd
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return False
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# Recurse into children
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user32.EnumChildWindows(hwnd, WNDENUMPROC(enum_children), 0)
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return True
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user32.EnumChildWindows(parent_hwnd, WNDENUMPROC(enum_children), 0)
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return result[0]
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def find_all_children(parent_hwnd):
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"""List all child windows for debugging."""
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children = []
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WNDENUMPROC = ctypes.WINFUNCTYPE(ctypes.c_bool, ctypes.wintypes.HWND, ctypes.wintypes.LPARAM)
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def enum_children(hwnd, _):
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buf = ctypes.create_unicode_buffer(256)
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user32.GetClassNameW(hwnd, buf, 256)
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class_name = buf.value
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l = user32.GetWindowTextLengthW(hwnd)
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text = ""
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if l > 0:
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tbuf = ctypes.create_unicode_buffer(l + 1)
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user32.GetWindowTextW(hwnd, tbuf, l + 1)
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text = tbuf.value
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rect = ctypes.wintypes.RECT()
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user32.GetWindowRect(hwnd, ctypes.byref(rect))
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w = rect.right - rect.left
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h = rect.bottom - rect.top
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visible = user32.IsWindowVisible(hwnd)
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enabled = user32.IsWindowEnabled(hwnd)
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children.append({
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'hwnd': hwnd,
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'class': class_name,
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'text': text[:50],
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'size': f"{w}x{h}",
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'pos': f"({rect.left},{rect.top})",
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'visible': visible,
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'enabled': enabled
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})
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return True
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user32.EnumChildWindows(parent_hwnd, WNDENUMPROC(enum_children), 0)
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return children
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def inject_background(code, target_hwnd):
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"""Inject Lua code into a specific child control using SendMessage."""
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# Put code on clipboard
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tmp = os.path.join(os.environ["TEMP"], "rbx.lua")
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with open(tmp, "w", encoding="utf-8") as f:
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f.write(code)
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subprocess.run(["powershell", "-Command", f"Get-Content '{tmp}' -Raw | Set-Clipboard"],
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capture_output=True, timeout=10)
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time.sleep(0.2)
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# Send Ctrl+A (select all) then Ctrl+V (paste) then Enter via PostMessage
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# PostMessage works on background windows
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VK_CONTROL = 0x11
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VK_A = 0x41
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VK_V = 0x56
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VK_RETURN = 0x0D
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# Select all: Ctrl+A
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user32.PostMessageW(target_hwnd, WM_KEYDOWN, VK_CONTROL, 0)
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user32.PostMessageW(target_hwnd, WM_KEYDOWN, VK_A, 0)
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time.sleep(0.02)
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user32.PostMessageW(target_hwnd, WM_KEYUP, VK_A, 0)
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user32.PostMessageW(target_hwnd, WM_KEYUP, VK_CONTROL, 0)
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time.sleep(0.05)
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# Paste: Ctrl+V
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user32.PostMessageW(target_hwnd, WM_KEYDOWN, VK_CONTROL, 0)
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user32.PostMessageW(target_hwnd, WM_KEYDOWN, VK_V, 0)
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time.sleep(0.02)
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user32.PostMessageW(target_hwnd, WM_KEYUP, VK_V, 0)
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user32.PostMessageW(target_hwnd, WM_KEYUP, VK_CONTROL, 0)
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time.sleep(0.5)
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# Execute: Enter
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user32.PostMessageW(target_hwnd, WM_KEYDOWN, VK_RETURN, 0)
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time.sleep(0.02)
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user32.PostMessageW(target_hwnd, WM_KEYUP, VK_RETURN, 0)
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time.sleep(2)
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# ═══════════════════════════════════════
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# MAIN
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# ═══════════════════════════════════════
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hwnd = find_studio()
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if not hwnd:
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print("ERROR: Roblox Studio not found!")
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sys.exit(1)
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print(f"Studio window: {hwnd}")
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# List all child windows to find command bar
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print("\nSearching for command bar control...")
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children = find_all_children(hwnd)
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# Filter for likely candidates: visible, enabled, small height (thin bar), near bottom
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print(f"Found {len(children)} child windows")
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# Get main window rect
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main_rect = ctypes.wintypes.RECT()
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user32.GetWindowRect(hwnd, ctypes.byref(main_rect))
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main_bottom = main_rect.bottom
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main_top = main_rect.top
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# Find candidates near bottom of window, visible, reasonable size
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candidates = []
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for c in children:
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if not c['visible']:
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continue
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try:
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h = int(c['size'].split('x')[1])
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w = int(c['size'].split('x')[0])
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except:
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continue
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if h < 5 or h > 80:
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continue
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if w < 100:
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continue
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# Parse position
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pos = c['pos'].strip('()')
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try:
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y = int(pos.split(',')[1])
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except:
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continue
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# Check if near bottom of main window
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if y > main_bottom - 100:
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candidates.append(c)
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print(f" CANDIDATE: hwnd={c['hwnd']} class={c['class']} text='{c['text']}' size={c['size']} pos={c['pos']}")
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if not candidates:
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print("\nNo command bar candidates found. Listing ALL visible children near bottom:")
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for c in children:
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if not c['visible']:
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continue
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pos = c['pos'].strip('()')
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try:
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y = int(pos.split(',')[1])
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except:
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continue
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if y > main_bottom - 150:
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print(f" hwnd={c['hwnd']} class={c['class']} text='{c['text']}' size={c['size']} pos={c['pos']}")
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# Try to test each candidate with a simple print
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test_code = 'print("BG_INJECT_OK")'
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print(f"\nTesting candidates with: {test_code}")
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for c in candidates:
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target = c['hwnd']
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print(f"\n Trying hwnd={target} class={c['class']}...")
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inject_background(test_code, target)
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print(f" Sent to {target}. Check Studio Output for 'BG_INJECT_OK'")
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