Edit Box Control Example

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#include <windows.h>

#define ID_EDIT    1
#define ID_BUTTON  2

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInstance,
                   HINSTANCE hPrevInstance,
                   LPSTR lpCmdLine,
                   int nCmdShow)
{
    WNDCLASSEX wc;
    MSG msg;

    // Define the window class
    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = 0;
    wc.lpfnWndProc = WndProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wc.lpszMenuName = NULL;
    wc.lpszClassName = TEXT("MyWindowClass");
    wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

    RegisterClassEx(&wc);

    // Create the main window
    CreateWindowEx(
        WS_EX_CLIENTEDGE,
        TEXT("MyWindowClass"),
        TEXT("Edit Box Demo"),
        WS_OVERLAPPEDWINDOW | WS_VISIBLE,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        700,
        350,
        NULL,
        NULL,
        hInstance,
        NULL);

    // Message loop
    while (GetMessage(&msg, NULL, 0, 0) > 0)
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return (int)msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd,
                         UINT msg,
                         WPARAM wParam,
                         LPARAM lParam)
{
    static HWND hwndEdit;
    static HWND hwndButton;
    static HWND hwndStatic;

    switch (msg)
    {
        case WM_CREATE:

            // Create the edit box
            hwndEdit = CreateWindow(
                TEXT("EDIT"),
                TEXT(""),
                WS_CHILD | WS_VISIBLE | WS_BORDER,
                20,
                60,
                250,
                30,
                hwnd,
                (HMENU)ID_EDIT,
                NULL,
                NULL);

            // Create the static text control
            hwndStatic = CreateWindow(
                TEXT("STATIC"),
                TEXT("Enter text below"),
                WS_CHILD | WS_VISIBLE | WS_BORDER | SS_LEFT,
                20,
                20,
                250,
                30,
                hwnd,
                NULL,
                NULL,
                NULL);

            // Create the button
            hwndButton = CreateWindow(
                TEXT("BUTTON"),
                TEXT("Set Title"),
                WS_CHILD | WS_VISIBLE,
                20,
                100,
                100,
                30,
                hwnd,
                (HMENU)ID_BUTTON,
                NULL,
                NULL);

            break;

        case WM_COMMAND:

            // Check if the button was clicked
            if (LOWORD(wParam) == ID_BUTTON &&
                HIWORD(wParam) == BN_CLICKED)
            {
                const int MAX_TEXT = 100;
                TCHAR textValue[MAX_TEXT];

                // Get text from the edit box
                GetWindowText(hwndEdit, textValue, MAX_TEXT);

                // Display the text in the static control
                SetWindowText(hwndStatic, textValue);
            }

            break;

        case WM_DESTROY:

            PostQuitMessage(0);
            break;

        default:

            return DefWindowProc(hwnd, msg, wParam, lParam);
    }

    return 0;
}