IP Address Control Example

#include <windows.h>
#include <commctrl.h>

#pragma comment(lib,"comctl32.lib")

#define IDC_IPADDRESS   1001
#define IDC_BUTTON      1002

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

int APIENTRY WinMain(HINSTANCE hInst,
                     HINSTANCE,
                     LPSTR,
                     int nCmdShow)
{
    INITCOMMONCONTROLSEX icc;
    icc.dwSize = sizeof(icc);
    icc.dwICC = ICC_INTERNET_CLASSES;
    InitCommonControlsEx(&icc);

    WNDCLASS wc = {0};
    wc.lpfnWndProc   = WndProc;
    wc.hInstance     = hInst;
    wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)(COLOR_BTNFACE + 1);
    wc.lpszClassName = TEXT("IPAddressExample");

    RegisterClass(&wc);

    HWND hwnd = CreateWindow(
        TEXT("IPAddressExample"),
        TEXT("Windows API IP Address Control"),
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        400,
        180,
        NULL,
        NULL,
        hInst,
        NULL);

    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);

    MSG msg;

    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return (int)msg.wParam;
}

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

    switch (msg)
    {
        case WM_CREATE:

            CreateWindow(
                TEXT("STATIC"),
                TEXT("IP Address:"),
                WS_CHILD | WS_VISIBLE,
                20,
                20,
                100,
                20,
                hwnd,
                NULL,
                GetModuleHandle(NULL),
                NULL);

            hIP = CreateWindowEx(
                WS_EX_CLIENTEDGE,
                WC_IPADDRESS,
                NULL,
                WS_CHILD | WS_VISIBLE,
                20,
                45,
                150,
                25,
                hwnd,
                (HMENU)IDC_IPADDRESS,
                GetModuleHandle(NULL),
                NULL);

            // Set default IP address: 192.168.1.100
            SendMessage(
                hIP,
                IPM_SETADDRESS,
                0,
                MAKEIPADDRESS(192,168,1,100));

            CreateWindow(
                TEXT("BUTTON"),
                TEXT("Read IP"),
                WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
                200,
                43,
                80,
                28,
                hwnd,
                (HMENU)IDC_BUTTON,
                GetModuleHandle(NULL),
                NULL);

            return 0;

        case WM_COMMAND:

            if (LOWORD(wParam) == IDC_BUTTON)
            {
                DWORD dwIP;

                if (SendMessage(hIP,
                                IPM_GETADDRESS,
                                0,
                                (LPARAM)&dwIP) == 4)
                {
                    BYTE b1 = FIRST_IPADDRESS(dwIP);
                    BYTE b2 = SECOND_IPADDRESS(dwIP);
                    BYTE b3 = THIRD_IPADDRESS(dwIP);
                    BYTE b4 = FOURTH_IPADDRESS(dwIP);

                    TCHAR szText[100];

                    wsprintf(
                        szText,
                        TEXT("%u.%u.%u.%u"),
                        b1,
                        b2,
                        b3,
                        b4);

                    MessageBox(
                        hwnd,
                        szText,
                        TEXT("IP Address"),
                        MB_OK);
                }
                else
                {
                    MessageBox(
                        hwnd,
                        TEXT("Please enter a complete IP address."),
                        TEXT("Error"),
                        MB_ICONEXCLAMATION);
                }
            }

            return 0;

        case WM_DESTROY:

            PostQuitMessage(0);
            return 0;
    }

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