HRESULT FoldersTree_GetData(HWND hwnd, void **ptr);
[in] HWND hwnd
Handle of the control.
[in] void **ptr
Pointer to the variable which receives the data.
Returns the user data associated with a FoldersTree control.
Do not use SetWindowLong
to set such data, because this
is used internally by FoldersTree control implementation.
See also: FoldersTree_SetData, FoldersTree_GetItemData.