Hello,
I just stated getting in touch with EmWin.
When I create a Messagebox with
GUI_MessageBox("This text is shown\nin a message box",
"Caption/Title", GUI_MESSAGEBOX_CF_MOVEABLE);
how can I control what happens when I hit the OK button? Do I have to set a proper callback funktion? How can I do that?
In the most simple case, I just want the MessageBox to disappear when I click OK.
Thank you!

Thank you very much. It worked as soon as I added a Callback Function to WM_HBKWIN processing the WM_PAINT message.

I have another question:

Basing on the HBKWIN (which is the parent of all following windows), I create 2 windows:

WM_HWIN child1, child2;

Both divide the screen:

-------------------
| child 1 |
-------------------
| child 2 |
-------------------

As far as I understood the documentation, the whole content of a window is described in the callback-Function (case WM_PAINT).
Examples: Text, Bitmaps ...

Now I want to create a button in child1.
Question: How can I "connect" the button to child 1?
In other words, how does the button know when child1 is inactive?
I think it makes no sense using BUTTON_CreateEx() in the WM_PAINT section. How can I "refresh" the button when the child1 window is repainted? Should I just call the Callback Function of the button itself out of the child1 Callback function? Or is this done automatically?

I hope you can understand my question. What is the "usual" way to create a button in a specific window and how is the button refreshed?

Thank you very much!

Regards

Michael

Edit: When I use functions like GUI_DrawBitmap(). How can I control in which of the windows the bitmap is drawed?

Thank you for your reply. I got everything working over the weekend.

And now I'm starting to see the big advantages of emWin in relation to the time effort necessary to get used to it.

Regards