diff --git a/hw/xwin/winmultiwindowwindow.c b/hw/xwin/winmultiwindowwindow.c
index 21b818b89..2d9a46e40 100644
--- a/hw/xwin/winmultiwindowwindow.c
+++ b/hw/xwin/winmultiwindowwindow.c
@@ -493,6 +493,8 @@ winCreateWindowsWindow (WindowPtr pWin)
   winPrivScreenPtr	pScreenPriv = pWinPriv->pScreenPriv;
   WinXSizeHints         hints;
   WindowPtr		pDaddy;
+  DWORD dwStyle, dwExStyle;
+  RECT rc;
 
   winInitMultiWindowClass();
 
@@ -517,6 +519,8 @@ winCreateWindowsWindow (WindowPtr pWin)
         iY = CW_USEDEFAULT;
     }
 
+  winDebug("winCreateWindowsWindow - %dx%d @ %dx%d\n", iWidth, iHeight, iX, iY);
+
   if (winMultiWindowGetTransientFor (pWin, &pDaddy))
     {
       if (pDaddy)
@@ -538,16 +542,35 @@ winCreateWindowsWindow (WindowPtr pWin)
       }
     }
 
-  /* Create the window */
-  /* Make it OVERLAPPED in create call since WS_POPUP doesn't support */
+  /* Make it WS_OVERLAPPED in create call since WS_POPUP doesn't support */
   /* CW_USEDEFAULT, change back to popup after creation */
-  hWnd = CreateWindowExA (WS_EX_TOOLWINDOW,	/* Extended styles */
+  dwStyle = WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
+  dwExStyle = WS_EX_TOOLWINDOW;
+
+  /*
+     Calculate the window coordinates containing the requested client area,
+     being careful to preseve CW_USEDEFAULT
+  */
+  rc.top = (iY != CW_USEDEFAULT) ? iY : 0;
+  rc.left = (iX != CW_USEDEFAULT) ? iX : 0;
+  rc.bottom = rc.top + iHeight;
+  rc.right = rc.left + iWidth;
+  AdjustWindowRectEx(&rc, dwStyle, FALSE, dwExStyle);
+  if (iY != CW_USEDEFAULT) iY = rc.top;
+  if (iX != CW_USEDEFAULT) iX = rc.left;
+  iHeight = rc.bottom - rc.top;
+  iWidth = rc.right - rc.left;
+
+  winDebug("winCreateWindowsWindow - %dx%d @ %dx%d\n", iWidth, iHeight, iX, iY);
+
+  /* Create the window */
+  hWnd = CreateWindowExA (dwExStyle,		/* Extended styles */
 			  WINDOW_CLASS_X,	/* Class name */
 			  WINDOW_TITLE_X,	/* Window name */
-			  WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
+			  dwStyle,		/* Styles */
 			  iX,			/* Horizontal position */
 			  iY,			/* Vertical position */
-			  iWidth,		/* Right edge */ 
+			  iWidth,		/* Right edge */
 			  iHeight,		/* Bottom edge */
 			  hFore,		/* Null or Parent window if transient*/
 			  (HMENU) NULL,		/* No menu */
@@ -569,6 +592,10 @@ winCreateWindowsWindow (WindowPtr pWin)
   SetWindowLongPtr(hWnd, GWL_STYLE, WS_POPUP | WS_CLIPCHILDREN | WS_CLIPSIBLINGS);
   SetWindowPos (hWnd, 0, 0, 0, 0, 0,
 		SWP_FRAMECHANGED | SWP_NOZORDER | SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
+
+  /* Adjust the X window to match the window placement we actually got... */
+  winAdjustXWindow (pWin, hWnd);
+
   /* Make sure it gets the proper system menu for a WS_POPUP, too */
   GetSystemMenu (hWnd, TRUE);
 
diff --git a/hw/xwin/winmultiwindowwndproc.c b/hw/xwin/winmultiwindowwndproc.c
index b559cd8cf..1a3be78d5 100644
--- a/hw/xwin/winmultiwindowwndproc.c
+++ b/hw/xwin/winmultiwindowwndproc.c
@@ -1008,6 +1008,64 @@ winTopLevelWindowProc (HWND hwnd, UINT message,
       winAdjustXWindow (pWin, hwnd);
       return 0; /* end of WM_SIZE handler */
 
+    case WM_STYLECHANGING:
+      /*
+        When the style changes, adjust the Windows window size so the client area remains the same size,
+        and adjust the Windows window position so that the client area remains in the same place.
+      */
+      {
+        RECT newWinRect;
+        DWORD dwExStyle;
+        DWORD dwStyle;
+        DWORD newStyle = ((STYLESTRUCT *)lParam)->styleNew;
+        WINDOWINFO wi;
+
+        dwExStyle = GetWindowLongPtr (hwnd, GWL_EXSTYLE);
+        dwStyle = GetWindowLongPtr (hwnd, GWL_STYLE);
+
+        winDebug("winTopLevelWindowProc - WM_STYLECHANGING from %08x %08x\n", dwStyle, dwExStyle);
+
+        if (wParam == GWL_EXSTYLE)
+          dwExStyle = newStyle;
+
+        if (wParam == GWL_STYLE)
+          dwStyle = newStyle;
+
+        winDebug("winTopLevelWindowProc - WM_STYLECHANGING to %08x %08x\n", dwStyle, dwExStyle);
+
+        /* Get client rect in screen coordinates */
+        wi.cbSize = sizeof(WINDOWINFO);
+        GetWindowInfo(hwnd, &wi);
+
+        winDebug("winTopLevelWindowProc - WM_STYLECHANGING client area {%d, %d, %d, %d}, {%d x %d}\n", wi.rcClient.left, wi.rcClient.top, wi.rcClient.right, wi.rcClient.bottom, wi.rcClient.right - wi.rcClient.left, wi.rcClient.bottom - wi.rcClient.top);
+
+        newWinRect = wi.rcClient;
+        if (!AdjustWindowRectEx(&newWinRect, dwStyle, FALSE, dwExStyle))
+          winDebug("winTopLevelWindowProc - WM_STYLECHANGING AdjustWindowRectEx failed\n");
+
+        winDebug("winTopLevelWindowProc - WM_STYLECHANGING window area should be {%d, %d, %d, %d}, {%d x %d}\n", newWinRect.left, newWinRect.top, newWinRect.right, newWinRect.bottom, newWinRect.right - newWinRect.left, newWinRect.bottom - newWinRect.top);
+
+        /*
+          Style change hasn't happened yet, so we can't adjust the window size yet, as the winAdjustXWindow()
+          which WM_SIZE does will use the current (unchanged) style.  Instead make a note to change it when
+          WM_STYLECHANGED is received...
+        */
+        pWinPriv->hDwp = BeginDeferWindowPos(1);
+        pWinPriv->hDwp = DeferWindowPos(pWinPriv->hDwp, hwnd, NULL, newWinRect.left, newWinRect.top, newWinRect.right - newWinRect.left, newWinRect.bottom - newWinRect.top, SWP_NOACTIVATE | SWP_NOZORDER);
+      }
+      return 0;
+
+    case WM_STYLECHANGED:
+      {
+        if (pWinPriv->hDwp)
+          {
+            EndDeferWindowPos(pWinPriv->hDwp);
+            pWinPriv->hDwp = NULL;
+          }
+        winDebug("winTopLevelWindowProc - WM_STYLECHANGED done\n");
+      }
+      return 0;
+
     case WM_MOUSEACTIVATE:
 
       /* Check if this window needs to be made active when clicked */
diff --git a/hw/xwin/winwindow.h b/hw/xwin/winwindow.h
index cf2f93f0a..ebe43091f 100644
--- a/hw/xwin/winwindow.h
+++ b/hw/xwin/winwindow.h
@@ -79,6 +79,7 @@ typedef struct
   HWND			hWnd;
   winPrivScreenPtr	pScreenPriv;
   Bool			fXKilled;
+  HDWP                  hDwp;
 
   /* Privates used by primary fb DirectDraw server */
   LPDDSURFACEDESC	pddsdPrimary;