Hi, Pawel -

What I've done in similar situations is to set the Visible property of the window to False in the painter, then at some point in the window's Open or in a window control's Constructor (or a ue_PostConstructor user event posted from the control's Constructor event), set the window's visible property to True after all setup/initialization has completed. Then the user doesn't see the window in partially-opened state. I also usually issue SetPoint(Hourglass!) to make the user aware there is activity being performed, even if they cannot (yet) see it.

You just have to be sure that at some point you always make the window visible. I also use this technique when the window has to perform one or more checks to see if it is permissible to open. If not, issue a message and close the window without the user ever having seen it.

HTH, John