SysTreeView32 show folder contents and QM folder contents

[Gintaras]

Is it possible to collapse everything? And is it possible to enforce one item to be expanded at all times?
(I could not find "TVM_COLLAPSE", only expand.)

TVM_EXPAND can collapse, but not all. Need to send TVM_EXPAND for each expanded item (folder).

And is it possible to enforce one item to be expanded at all times?

under case TVN_ITEMEXPANDINGW:
if(is it my always expanded item) ret DT_Ret(hDlg 1)