Hello together,

unfortunately we have the same problem (black screen during opening of windows) on most of the Windows 10 machines since we use Themes (PB2021 1506).

the good news: DisableProcessWindowsGhosting fixes the problem.

But than we have other problems.

Can anyone confirm the following facts?
The problem with the black screen does not occur on windows 11! We can't reproduce the problem on any Windows 11 device so far (though we have very few Windows 11 devices in use).

Thanks and best regards

Heiko

Hi Ben;

   Just an FYI to those who use my STD Framework. This is already all built-in. Just set the INI file for the App/Framework as follows ....

The framework will then take care of executing the "DisableProcessWindowsGhosting" SDK API.

Regards ... Chris

The black screen issue during long-running processes happens to me when using PB themes. Even when running the app locally. (PB2019 R2) You could try disabling the window ghosting feature by invoking DisableProcessWindowsGhosting() from user32.dll as a workaround.

AFAIK Windows marks a window as unresponsive if the UI thread doesn't receive messages for more than 5 seconds. A way to avoid unresponsive windows altogether would be using shared objects to run long-running loops or database retrieves in a seperate thread. This might require larger architectural changes to your code, though.

Hi Rahul et Al;

  I have now seen a few reports about this happening. It is not happening very often. However, no rationale yet as to pin-point the cause of the blank screens as the noted PB App's execution criteria are as diverse as their environments that they run under. 

 If you can, please open a Support Case for this blank screen issue and provide as much information as possible about the PB App design, compilation settings, O/S environment, PB version & build, etc so that Appeon can start to narrow down the cause (environment vs PB App).

Regards .. Chris

Here's a picture of the phenomenon.

Hi Rahul,

I think that you might need to make sure, first of all, that all RDP settings are correct. Then, as Chris said, you might want to make sure that no Retrieve is placed on the Open() or Constructor() events. 

Here you may find a Code Sample from CodeXchange the shows some techniques for what you are looking for: User Interfaces for Long Running Processes

I hope this helps.

Regards,

We're seeing this with PowerBuilder 2019 R2, connecting with RDP.  The window's title bar is displayed, but the MDI area goes completely black until the retrieval completes.  Has anyone else seen this, and if so, what was the solution.

Hi Rahul;

   This sounds like it might be a Citrix / RDP configuration issue. I would like to suggest that you talk with a Citrix/RDP support person on this aspect and see if they have any suggestions as to what is causing this issue. Sounds to me like maybe a resource related issue.

Regards ... Chris