workaround for a bug where sometimes a background window steals the focus

ddraw.rc

@@ -2,7 +2,7 @@
 #define vxstr(a,b,c,d) str(a##.##b##.##c##.##d)
 #define str(s) #s
 
-#define VERSION 1,1,7,0
+#define VERSION 1,1,7,1
 
 1 VERSIONINFO
 FILEVERSION VERSION

src/main.c

@@ -590,6 +590,24 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
             }
             return 0;
 
+        //workaround for a bug where sometimes a background window steals the focus
+        case WM_WINDOWPOSCHANGING:
+        {
+            if (ddraw->locked)
+            {
+                WINDOWPOS *pos = (WINDOWPOS *)lParam;
+                
+                if (pos->flags == SWP_NOMOVE + SWP_NOSIZE)
+                {
+                    mouse_unlock();
+                    
+                    if (GetForegroundWindow() == ddraw->hWnd)
+                        mouse_lock();
+                }
+            }
+            break;
+        }
+
         case WM_MOUSELEAVE:
             mouse_unlock();
             return 0;