# 🏁 Uniface 10.4: Summary, Best Practices & Resources for the activate Statement

🎯 Conclusion: activate as the Key to Flexible Uniface Development

The activate statement is the central tool for executing operations on component instances in Uniface. It offers you:

Flexibility: Dynamically call operations synchronously, asynchronously, or statelessly.
Error Control: Return values and error codes enable robust error handling.
Modularity: By passing parameters, lists, and entities, you can elegantly model complex scenarios.

Always check $status and $procerror:

This lets you detect errors early and react appropriately.
Use qualifiers consciously:

Apply /async, /stateless, or /list as needed to achieve the desired execution mode.
Call operations with variables:

This increases the reusability and flexibility of your code.
Avoid negative return values:

In your own operations, avoid returning negative values, as Uniface interprets these as errors.
Use exception handling:

Utilize try/catch to catch and handle exceptions cleanly.
Always check parameters and arguments:

The number and type of arguments must match the declared parameters.