如何在列表框上右键单击创建上下文菜单？

Question

I have a window with a listbox which I would like to right click an entry in the list box and have certain options displayed in a context menu. I've looked online but it seems as if I can only get examples in MFC C++, or simply c#.

Is this possible in standard Win32 c++? I can handle a right click on the listbox via the WM_CONTEXTMENU message, but how can I make a menu appear?

Answer 1

I figured it out, thanks to Bhargav Bhat's comment about the related question.

Handle right click on the listbox via checking for WM_CONTEXTMENU in your WndProc.

Grab the handle to the window via the wParam parameter, compare it to your listbox to see if the user right clicked the listbox.

From there, create the popupmenu via CreatePopupMenu().

Insert/Append into the menu via InsertMenu()/AppendMenu().

Finally, call TrackPopupMenu().

case WM_CONTEXTMENU:
        if ((HWND)wParam == m_hListBox) {
            m_hMenu = CreatePopupMenu();
            InsertMenu(m_hMenu, 0, MF_BYCOMMAND | MF_STRING | MF_ENABLED, 1, "Hello");
            TrackPopupMenu(m_hMenu, TPM_TOPALIGN | TPM_LEFTALIGN, GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam), 0, m_hWnd, NULL); 
        }