[VB6] ucShellTree - Full-featured Shell Tree UserControl

[fafalone]

It should... it expands the folder in response to a TVN_ITEMEXPANDING notification; I'd think the API would send that? Are you changing the item state or using TVM_EXPAND? MSDN says it raises the message for the latter, but I'm not clear if the former would.

It also notes that if you expanded it once, a subsequent message wouldn't send the notification again... so if you tried to expand it, then list files copied after that into that folder, it wouldn't attempt to load them unless you cleared the TVIS_EXPANDEDONCE flag on the item:

When an item is first expanded by a TVM_EXPAND message, the action generates TVN_ITEMEXPANDING and TVN_ITEMEXPANDED notification codes and the item's TVIS_EXPANDEDONCE state flag is set. As long as this state flag remains set, subsequent TVM_EXPAND messages do not generate TVN_ITEMEXPANDING or TVN_ITEMEXPANDED notifications. To reset the TVIS_EXPANDEDONCE state flag, you must send a TVM_EXPAND message with the TVE_COLLAPSE and TVE_COLLAPSERESET flags set. Attempting to explicitly set TVIS_EXPANDEDONCE will result in unpredictable behavior.

Is it generating an ItemExpand event? Also, what's the return code? The control does reject that message under some circumstances; I had put a flag to work around a certain bug, but hadn't considered the case of manipulating it externally through API. If TVM_EXPAND is returning 1, that's the problem.