Closing Modal Form stops Task Bar

[Doug Bell]

Hi,
Can someone explain what is happening here or how to get around it?

I have a main form "PurchaseOrders". Selecting an Order from the DataGrid
and Details button opens a Modal Form "OrderDetails" displaying the Order
Lines.

Dim mOrderDetails AS FormOrderDetails = New FormOrderDetails
mOrderDetails.ShowDialog()

That works fine.

When the Modal Form is closed whether by X or by the Save or Cancel buttons
the form closes passing focus back to the main form.

The problem is that when the focus is passed back to the main form the
Windows Task Bar will no longer pop-up (unhide). If the form is minimised
and then re-selected it all works fine again.

Thanks

Doug