Hi Olaf, I found a phenomenon:

In VB6 IDE, if RC5.Subclass or vbWidgets-related code is used in the VB6-Forms, after the VB6-Forms exit and return to design mode, at this time, if I open the VB6 Object-Browser window and drag the sub-window dividing line with the mouse, then the mouse is always in the "splitting-dragging" state, and cannot exit from the Object-Browser window, resulting in the entire VB6 IDE windows being frozen.

This phenomenon has occurred many times.