SetVisible

Changes the visibillity of a header or task.

Prototype:

SetVisible(BYTE IsVisible)

SetVisible(LONG HeaderID, BYTE IsVisible)

SetVisible(LONG HeaderID, LONG TaskID, BYTE IsVisible)

Arguments:

HeaderID	The unique ID of the header you want to change
TaskID	The ID of the task you want to change
IsVisible	If you set this value to true the item will become visible. If false, the item is hidden.

Note:

If you use the first prototype, the last added header or task will be affected.

If you uses the second prototype to hide or unhide a header, the tooltips for the tasks in the header will be refreshed.