I am attempting to host a VST plug-in's UI inside a QDialog (Qt 4.6.3). To date, on Window, everything goes well. But on Mac OS X nothing seems within the window, and clicks within the dialog don't have any effect either (no action is drawn in the plug-in). Here's an excerpt from the code I personally use:

MyQDialog* lDialog = new MyQDialog(NULL)

mEffect->dispatcher(mEffect, effEditOpen, , , (void*)(lDialog->winId()), )

Did I forget something specific to Mac OS X? Thank you for any help.