채팅 추가

Assets/02_Scripts/Desktop/Win32.cs

@@ -47,6 +47,7 @@ internal static class Win32
     public const int SW_SHOW = 5;
 
     public const int VK_LBUTTON = 0x01;
+    public const int VK_ESCAPE = 0x1B;
     public const int VK_SHIFT = 0x10;
     public const int VK_CONTROL = 0x11;
     public const int VK_MENU = 0x12;   // Alt
@@ -105,6 +106,47 @@ public struct RECT
     [DllImport("user32.dll")] public static extern bool SetLayeredWindowAttributes(IntPtr hWnd, uint crKey, byte bAlpha, uint dwFlags);
     [DllImport("dwmapi.dll")] public static extern int DwmExtendFrameIntoClientArea(IntPtr hWnd, ref MARGINS pMarInset);
 
+    // --- 포커스 ---
+    [DllImport("user32.dll")] public static extern bool SetForegroundWindow(IntPtr hWnd);
+    [DllImport("user32.dll")] public static extern IntPtr SetFocus(IntPtr hWnd);
+    [DllImport("user32.dll")] public static extern bool IsWindow(IntPtr hWnd);
+    [DllImport("user32.dll")] public static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);
+    [DllImport("user32.dll")] public static extern bool AttachThreadInput(uint idAttach, uint idAttachTo, bool fAttach);
+    [DllImport("kernel32.dll")] public static extern uint GetCurrentThreadId();
+
     public static bool IsKeyDown(int vKey) => (GetAsyncKeyState(vKey) & 0x8000) != 0;
+
+    /// <summary>
+    /// 창을 확실히 활성화한다.
+    ///
+    /// SetForegroundWindow 는 그냥 부르면 자주 무시된다. 윈도우는 포그라운드를
+    /// 가로채는 것을 막으려고 "마지막 입력을 받은 프로세스"만 허용하는데, 우리 창은
+    /// WS_EX_NOACTIVATE 라 그 판정에서 밀리는 경우가 있다. 현재 포그라운드 창의
+    /// 입력 큐에 잠깐 붙었다 떼면 같은 스레드로 취급돼 통과한다.
+    /// </summary>
+    public static void ForceForeground(IntPtr hwnd)
+    {
+        if (hwnd == IntPtr.Zero) return;
+
+        IntPtr foreground = GetForegroundWindow();
+        if (foreground == hwnd)
+        {
+            SetFocus(hwnd);
+            return;
+        }
+
+        uint currentThread = GetCurrentThreadId();
+        uint foregroundThread = foreground != IntPtr.Zero
+            ? GetWindowThreadProcessId(foreground, out _)
+            : currentThread;
+
+        bool attached = foregroundThread != 0 && foregroundThread != currentThread &&
+                        AttachThreadInput(currentThread, foregroundThread, true);
+
+        SetForegroundWindow(hwnd);
+        SetFocus(hwnd);
+
+        if (attached) AttachThreadInput(currentThread, foregroundThread, false);
+    }
 }
 #endif