TVM_EXPAND
The
TVM_EXPAND message expands or collapses the list of child items, if any,
associated with the specified parent item. You can send this message explicitly
or by using the TreeView_Expand macro.
TVM_EXPAND
wParam = (WPARAM) (UINT) flag;
lParam = (LPARAM) (HTREEITEM) hitem;
Parameters
flag
Action flag.
This parameter can be one of the following values:
|
Value |
Meaning |
|
TVE_COLLAPSE |
Collapses
the list. |
|
TVE_COLLAPSERESET |
Collapses
the list and removes the child items. Note that TVE_COLLAPSE must also be
specified. |
|
TVE_EXPAND |
Expands the
list. |
|
TVE_TOGGLE |
Collapses
the list if it is currently expanded or expands it if it is currently
collapsed. |
hitem
Handle to the
parent item to expand or collapse.
Return Values
Returns TRUE
if any change took place or FALSE otherwise.
Remarks
This message
does not send the TVN_ITEMEXPANDING and TVN_ITEMEXPANDED notification messages
to the parent window.
See Also