propsheet: run our own message loop for modal propsheets

[Robert Shearman]

Huw D M Davies wrote:

>        Huw Davies <huw at codeweavers.com>
>        For modal propsheets we should run our own message loop rather than
>        use a modal dialogbox just like Windows does.  This helps apps that
>        subclass the propsheet's wndproc.
>  
>

>+static INT do_loop(PropSheetInfo *psInfo)
>+{
>+    MSG msg;
>+    INT ret = 0;
>+    HWND hwnd = psInfo->hwnd;
>+
>+    while(IsWindow(hwnd) && !psInfo->ended && (ret = GetMessageW(&msg, NULL, 0, 0)))
>+    {
>+        if(ret == -1)
>+            break;
>+
>+        if(!IsDialogMessageW(hwnd, &msg))
>+        {
>+            TranslateMessage(&msg);
>+            DispatchMessageW(&msg);
>+        }
>+    }
>+    if(ret == 0) ret = -1;
>+
>+    DestroyWindow(hwnd);
>+    return ret;
>+}
>

If you get a WM_QUIT message while in the loop, then you have to repost 
it so that the application sees it and shuts down properly.

-- 
Rob Shearman