Unable to use Menu about imgui HOT 3 CLOSED

There is a lot of useful documentation (in form of source comments) in the header file itself if you navigate to the function declarations. Small excerpt:

    IMGUI_API bool          BeginMenu(const char* label, bool enabled = true);                  // create a sub-menu entry. only call EndMenu() if this returns true!
    IMGUI_API void          EndMenu();                                                          // only call EndMenu() if BeginMenu() returns true!

In short: your unconditional call to EndMenu() is wrong.

from imgui.

WOOW, Thank you. I didn't expect it to be this simple. HAHA.
Well thank you very much for your quick response.
I'll close this issue now.

from imgui.

That's not the only thing though. As you can see in the documentation, BeginMenu() is for sub-menues only, not for menu bars. A few lines higher in the header you will find the correct functions to use if you want a menu bar (and according to your window flag that seems to be your intention) instead of a sub-menu widget.

Also always a good reference for how things work: ImGui::ShowDemoWindow(). That function is there to showcase features and is basically a reference source on how to use them. And it starts with a menu bar.

from imgui.