1. Dave O'BILOG
  2. PowerBuilder
  3. Friday, 28 May 2021 08:51 AM UTC



It's possible to do nothing in my application  while a datwindow retrieve is not finished ?



Sivaprakash BKR Accepted Answer Pending Moderation
  1. Saturday, 29 May 2021 12:02 PM UTC
  2. PowerBuilder
  3. # 1


One solution could be, 

In open event, disable all buttons, readonly all dws.

In retrieve end event, enable all buttons, remove readonly for all dws.

See whether suits your requirement.  


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John Fauss Accepted Answer Pending Moderation
  1. Friday, 28 May 2021 13:21 PM UTC
  2. PowerBuilder
  3. # 2

Hi, Dave - 

PowerBuilder applications are single-threaded by default, so when your app is waiting for a database request to complete, the main (and only) execution thread waits. It is possible to create a special type of non-visual object that can be executed in its own thread, and there can be many of these objects executing simultaneously... but it's a somewhat advanced topic with a non-intuitive implementation and there's very little documentation/tutorial information available, that I know of.

Typically, this feature is used to spin off the execution of long-running tasks, such as a database query or execution of a stored procedure, or to offload the writing and/or reading of files, tasks that commonly tie up the main execution thread that is mainly devoted to managing the app's GUI.

If you're interested in learning more, I suggest you begin by examining the four PB Help topics that begin with "SharedObjectxxxxxx". SharedObjectGet provides some explanation of the capabilities.

Best regards,

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