ToolTips on buttons in non modal dialog boxes

I'd like to show some tool tips on Bitmap Buttons in a non modal dialog box to explain their meaning in detail. I'd like to use CToolTipCtrl of MFC, but I don't see an elegant way of calling
CToolTipCtrl::RelayEvent(), because Dialog::PreTranslateMessage() isn't called in a non modal dialog and the mouse messages are handled by the buttons themselves. I'd like to handle the tool tips in the dialog if that'possible.

I'm also trying to implement tooltips on buttons for a non-modal dialog box. Haven't been able to get them working. Have you since found a solution?