It works now. Stingray should be compiled as MFC Dll Stingray dll and project settings should indicate that these libraries should be used. Something like _SFLDLL, _OVDLL.... in preprocessor definition should be put

I have the same problem with the same method in BOOL SEC_TREECLASS::ModifyTreeCtrlStyleEx inside, the first line is DWORD dwTreeStyleEx = GetTreeCtrlStyleEx(); but it jumps into SetTreeCtrlStyleEx() How did you manage to overcome your problem?

It's not that easy - the dialog B is a modaless dialog and its parent is a MainFrame...

I have a view from wh:eek:ere I call an Object A property dialog (modal). In that Dailog I call an Object B property dialog (non modal). It may happen that the Object A is destroyed in the Object B property dialog. So it looks logical to close the Object A property dialog automatically by sending it a message to close itself. OK, I know how to write and handle messages in general but i don't know how to send a message to the Object A property dialog. Should i store a pointer to this dialog and then call a SendMessage? Looks absurd... SendMessageToDescendants() called for AfxGetMainWnd() doesn't work... Any explanation would be appreciated.