The In numbers should be sent from the worksheet to the calculation server. The reason for this is that the In numbers should display immediate once the cell is executed. So the In numbers should appear before server result is returned.
The Out numbers should be sent from the calculation server to the worksheet. It should match the In number of the cell. The returned Out number is the authority on the In number. The Out number should also be used in Worksheet to keep track of the execution number.
The In numbers should be sent from the worksheet to the calculation server. The reason for this is that the In numbers should display immediate once the cell is executed. So the In numbers should appear before server result is returned.
The Out numbers should be sent from the calculation server to the worksheet. It should match the In number of the cell. The returned Out number is the authority on the In number. The Out number should also be used in Worksheet to keep track of the execution number.