I am having a problem I need to Rewrite the program so input, processing, and output are each performed by calls to Sub procedures.

Private Sub btnCompute_Click(...) Handles btnCompute.Click
‘Information about trees
Dim num As Integer = 7

To rewrite the program using sub procedures for input, processing, and output, you will need to create separate sub procedures for each task. Here's how you can do it:

1. Create a sub procedure for input:
- Declare the necessary variables for input, such as "num."
- Move the code that asks for user input inside this sub procedure.
- Assign the input values to the variables.

Example:
```
Private Sub GetInput()
' Information about trees
Dim num As Integer = Integer.Parse(txtNum.Text)
End Sub
```

2. Create a sub procedure for processing:
- Move the code that performs calculations or any other processing inside this sub procedure.
- If required, pass the necessary variables as parameters to this sub procedure.
- Update the code inside this sub procedure to use the passed variables instead of the variables used directly.

Example:
```
Private Sub ProcessData(currentNum As Integer)
' Processing code here
End Sub
```

3. Create a sub procedure for output:
- Move the code that displays the output or performs any other output-related tasks inside this sub procedure.
- If required, pass the necessary variables as parameters to this sub procedure.
- Update the code inside this sub procedure to use the passed variables instead of the variables used directly.

Example:
```
Private Sub DisplayOutput(currentNum As Integer)
' Output code here
End Sub
```

4. Adjust the event handler:
- Modify the event handler, in this case, `btnCompute_Click`, to call the new sub procedures.
- Call the sub procedures in the appropriate order, such as first calling `GetInput`, then `ProcessData`, and finally `DisplayOutput`.
- Pass the required variables between the sub procedures, if necessary.

Example:
```
Private Sub btnCompute_Click(...) Handles btnCompute.Click
GetInput()
ProcessData(num)
DisplayOutput(num)
End Sub
```

Remember to adjust the code inside the sub procedures according to your specific requirements. This will help separate the different tasks and make the program more modular and maintainable.