Hi BKR;

FWIW: I can do an ApplyTheme() command at anytime and anywhere within an STD Framework based App and it activates the new Theme right away with no App issues. Of course, you still need to restart your PB App when turning themes off. ;-)

It would be interesting to hear back though from other Theme based PB App developers on there experiences.

Regards ... Chris

Thanks Chris,

As per Powerbuilder Reference @

https://docs.appeon.com/pb2021/powerscript_reference/ApplyTheme_func.html#:~:text=The%20ApplyTheme%20method%20should%20be%20called%20when%20all,precedence%20over%20those%20selected%20in%20the%20PowerBuilder%20painter.

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It's usage part

Usage



The ApplyTheme method should be called when all windows are closed, for example, it can be called in the Application Open event when all of the child windows are not yet opened.

The theme path and name set by the ApplyTheme function takes precedence over those selected in the PowerBuilder painter. See the following code examples for illustration.

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So far we haven't here tried it setting in any other window, except application open event.

Simply applying a different themes while the app is running doesn't work for me at all. (PB 2019 R3) What does work is applying an "empty" theme first (meaning a theme.json that has everything set to "drawing":false) and then applying the new theme. I think I vaguely remember this causing crashes under certain circumstances, though.