isrbxactive

Checks whether the Roblox game window currently has OS focus:

HWND foreground = GetForegroundWindow();
HWND roblox = FindWindowA(NULL, "Roblox");
return foreground == roblox;

Returns true if the player is actively viewing the Roblox window, false if it's minimized, occluded, or another application has focus. The check is a single Win32 API call — essentially free.

Used as a guard before sending input events. Simulated mouse/keyboard input targets the focused window, so sending clicks while Roblox is unfocused would interact with the wrong application. Always check isrbxactive() before calling mouse or keyboard functions.