WM_KILLFOCUS logic

The WM_KILLFOCUS message is sent to a window when it loses focus, meaning that another window becomes the active window. You can handle this message in your window procedure to perform specific actions when your window loses focus.

Here is an example of the logic you can implement for handling the WM_KILLFOCUS message:

cppCopy code
LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)

{

    switch (uMsg)

    {

        case WM_KILLFOCUS:

        {

            // Perform actions when the window loses focus

            // This could include updating UI, saving data, etc.

            break;

        }



        // Other message cases...



        default:

            return DefWindowProc(hwnd, uMsg, wParam, lParam);

    }



    return 0;

}

In this example, when the WM_KILLFOCUS message is received, you can add the necessary code inside the case block to handle the specific actions you want to take when the window loses focus.

Note that the logic you implement will depend on your specific requirements. You can update UI elements, save data, or perform any other necessary operations based on your application's needs.

Make sure to handle other relevant messages appropriately in your window procedure to handle all necessary interactions with the window and its state.