How to enable themes in Lazarus?

[LazaruX]

Hi, I am not sure my question will be clear.

Question 1
In the past Lazarus was only able to produce programs with the redmond theme (=like Win95, Win98, Win2000). Now it also supports "themes", this means the components have the style that is set on the system.
Is there a way to manually force one or the other?

Question 2
I am trying to use a TPageControl and a TButton on my form and I notice that the TPageControl has the Redmond theme (=like windows 9x) and the button the system theme, why?

[Fred vS]

Questions 1 + 2  => In project Options => enable manifest themes

Fre;D

[LazaruX]

When I do that I get a "Debugger Error" window

Code: [Select]

The GDB command:
"-exec-run"
returned the error:
",msg="Error creating process D:/Develop/Lazarus/Project/Test.exe, (error 740).""



[Fred vS]

When I do that I get a "Debugger Error" window

I think that... you have to show us your code... 

Fre;D

[LazaruX]

Hi Fred,
thanks for your replies. Well my code is just a simple form with some Components on it. No coding part yet.
I read that GDB32bit on Windows 64 bit gives some problems Is this related?
I am developing on Windows 8.1 Update 1 64 bit.

[LazaruX]

No idea why, but I reinstalled Lazarus and now it seems to be working. My question still remains: how can I manually force the change of themes during execution?
At the moment I just see that if the manifest file is there it uses the system theme, if it's not there it uses the redmond theme. I see other applications (example: ActiveXperts Network Monitor) have an option to change across multiple themes. How can I do that in Lazarus?

[taazz]

No idea why, but I reinstalled Lazarus and now it seems to be working. My question still remains: how can I manually force the change of themes during execution?

You can't lcl does not allow you to control the look and feel it forces the default theme the OS uses when you enable it from the option that fred mentioned you simple instruct the OS that you application can handle the new themes and allow you to shaw the new look and fill after that everything goes through the ThemeManager but it does not support custom theming at all.