The TreeView_Expand macro expands or collapses the list of child items, if any, associated with the specified parent item. You can use this macro or explicitly send the TVM_EXPAND message.
BOOL TreeView_Expand(
| hwnd, | |
| hitem, | |
| flag | |
| ); |
Parameters
hwnd
Handle to the tree-view control.
hitem
Handle to the parent item to expand or collapse.
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. |
Return Values
Returns TRUE if any change took place or FALSE otherwise.
Remarks
This macro does not send the TVN_ITEMEXPANDING and TVN_ITEMEXPANDED notification messages to the parent window.
See Also