Tips & Tricks for your 4D Apps – April 2024 Edition

by Add Komoncharoensiri, Director of Technical Services at 4D Inc

Here we go with another set of tips and tricks.

The 4D Knowledge Base is a library of information about 4D technology where weekly tech tips and monthly tech notes are actively published. If you missed the last tips on the KB, that’s fine; here is a compilation from the past few weeks.

This blog post covers 17 tips:

1. 1. 1. Build4D Component: “_checkDestinationFolder” function in deletes folder contents
      2. Firewall Settings For QUIC Network Layer
      3.  Utility method that changes the mouse cursor based on the enabled state of an object
      4. “Current journal file not available” error message
      5. Error: Cannot load uncompiled component because the host has been opened in compiled mode
      6. Storage access scopes
      7. Enhancing the display of boolean data in a listbox column when it is display-only
      8. Value type returns different results for integers as variant parameters
      9. Expansion licenses are now merged into the master license after activation
      10. Associating Objects with a Combo Box
      11. Warning: Table.Form.Page.Picture refers to a resource PICT ID = -20XX (Binary Only)
      12. Error: Signed file error, the specified item could not be found in the keychain
      13. How to chain ternary conditional operator
      14. Using WP FREEZE FORMULAS to turn expressions into plain text
      15. Investigating the Project Mode Conversion Log
      16. Accessing DataStore function .getGlobalStamp() from 4D Remote or Remote Datastore Session
      17. SMTPTransporter connection broken error