user32: Fix maximized child windows.

dlls/user32/tests/win.c

@@ -5190,15 +5190,6 @@ static void test_fullscreen(void)
             /* Windows makes a maximized window slightly larger (to hide the borders?) */
             fixup = min(abs(rc.left), abs(rc.top));
             InflateRect(&rc, -fixup, -fixup);
-            /* FIXME: this doesn't work correctly in Wine for child windows yet */
-            if (style & WS_CHILD)
-            todo_wine
-            ok(rc.left >= mi.rcWork.left && rc.top <= mi.rcWork.top &&
-               rc.right <= mi.rcWork.right && rc.bottom <= mi.rcWork.bottom,
-               "%#x/%#x: window rect %d,%d-%d,%d must be in %d,%d-%d,%d\n",
-               ex_style, style, rc.left, rc.top, rc.right, rc.bottom,
-               mi.rcWork.left, mi.rcWork.top, mi.rcWork.right, mi.rcWork.bottom);
-            else
             ok(rc.left >= mi.rcWork.left && rc.top <= mi.rcWork.top &&
                rc.right <= mi.rcWork.right && rc.bottom <= mi.rcWork.bottom,
                "%#x/%#x: window rect %d,%d-%d,%d must be in %d,%d-%d,%d\n",

dlls/user32/winpos.c

@@ -658,6 +658,7 @@ void WINPOS_GetMinMaxInfo( HWND hwnd, POINT *maxSize, POINT *maxPos,
     HMONITOR monitor;
     INT xinc, yinc;
     LONG style = GetWindowLongW( hwnd, GWL_STYLE );
+    LONG adjustedStyle;
     LONG exstyle = GetWindowLongW( hwnd, GWL_EXSTYLE );
     RECT rc;
     WND *win;
@@ -671,10 +672,12 @@ void WINPOS_GetMinMaxInfo( HWND hwnd, POINT *maxSize, POINT *maxPos,
     if (style & WS_CHILD)
     {
         if ((style & WS_CAPTION) == WS_CAPTION)
-            style &= ~WS_BORDER; /* WS_CAPTION = WS_DLGFRAME | WS_BORDER */
+            adjustedStyle = style & ~WS_BORDER; /* WS_CAPTION = WS_DLGFRAME | WS_BORDER */
+        else
+            adjustedStyle = style;
 
         GetClientRect(GetAncestor(hwnd,GA_PARENT), &rc);
-        AdjustWindowRectEx(&rc, style, ((style & WS_POPUP) && GetMenu(hwnd)), exstyle);
+        AdjustWindowRectEx(&rc, adjustedStyle, ((style & WS_POPUP) && GetMenu(hwnd)), exstyle);
 
         MinMax.ptMaxSize.x = rc.right - rc.left;
         MinMax.ptMaxSize.y = rc.bottom - rc.top;