How to create a radio button and see if it's checked?

Question

How to create a radio button and see if it's checked?

• Windows Vista
• Dev-C++
• Win32 API
• WM styles

Answer 1

To find out whether a radio button (or check box) is checked, send the BM_GETCHECK message to the control and check the return value. You will need the HWND of your control; to get that from the control ID, call GetDlgItem().

Answer 2

Use CreateWindow() or CreateWindowEx() with the button style BS_RADIOBUTTON or BS_AUTORADIOBUTTON to create one. E.g.:

HWND radioButtonHandle = CreateWindow(
    TEXT("BUTTON"), TEXT("my radio button"), 
    WS_CHILD | WS_VISIBLE | BS_RADIOBUTTON,
    /* ... */);