Just curious, Does that fix solve the dialog being placed in wrong position?
I didn't test it yet. But when I loaded the XRC file into XRCEd, it threw me couple of missing parameters error.
18:41:44: Required parameter label of wxButton missing
18:41:44: Required parameter label of wxButton missing
18:41:44: Required parameter min of wxSlider missing
18:41:44: Required parameter label of wxButton missing
18:41:44: Required parameter label of wxButton missing
Regards,
Biplab