Tab Control Demo

To create a tab control, specify WC_TABCONTROL as the window class and register the control by specifying the ICC_TAB_CLASSES flag in the accompanying INITCOMMONCONTROLSEX structure before calling InitCommonControlsEx().

#define _WIN32_WINNT 0x0501
#include <windows.h>
#include <commctrl.h>

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


#define ID_TABCTRL 1
#define ID_EDIT    2
#define BTN_ADD 3
#define BTN_DEL 4
#define BTN_CLR 5

#define MAX_TAB_LEN 15

HWND hTab;
HWND hEdit;

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

int WINAPI WinMain(
    HINSTANCE hInstance,
    HINSTANCE hPrevInstance,
    LPSTR lpCmdLine,
    int nCmdShow)
{

    MSG msg;
    WNDCLASS wc;
    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_BTNFACE+1);
    wc.lpszMenuName = NULL;
    wc.lpszClassName = TEXT("TabControlClass");
    RegisterClass(&wc);

    CreateWindow(
        TEXT("TabControlClass"),
        TEXT("Tab Control Demo"),
        WS_OVERLAPPEDWINDOW |
        WS_VISIBLE,
        100,
        100,
        400,
        230,
        NULL,
        NULL,
        hInstance,
        NULL);

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

LRESULT CALLBACK WndProc(
    HWND hwnd,
    UINT msg,
    WPARAM wParam,
    LPARAM lParam)
{
    switch(msg)
    {

    case WM_CREATE:
    {
        INITCOMMONCONTROLSEX icex;
        
        // Load tab control class
        icex.dwSize =
            sizeof(INITCOMMONCONTROLSEX);
        icex.dwICC =
            ICC_TAB_CLASSES;
        InitCommonControlsEx(&icex);
        
        // Create tab control
        hTab = CreateWindowEx(
            0,
            WC_TABCONTROL,
            NULL,
            WS_CHILD |
            WS_VISIBLE |
            WS_CLIPSIBLINGS,

            10,
            10,
            210,
            150,
            hwnd,
            (HMENU)ID_TABCTRL,
            NULL,
            NULL);

        // Edit box for tab name
        hEdit = CreateWindow(
            TEXT("EDIT"),
            NULL,
            WS_CHILD |
            WS_VISIBLE |
            WS_BORDER |
            ES_AUTOHSCROLL,
            250,
            20,
            100,
            25,
            hwnd,
            (HMENU)ID_EDIT,
            NULL,
            NULL);

        // Limit text length
        SendMessage(
            hEdit,
            EM_LIMITTEXT,
            MAX_TAB_LEN,
            0);

        CreateWindow(
            TEXT("BUTTON"),
            TEXT("Add"),
            WS_CHILD |
            WS_VISIBLE |
            BS_PUSHBUTTON,
            250,
            55,
            100,
            25,
            hwnd,
            (HMENU)BTN_ADD,
            NULL,
            NULL);

        CreateWindow(
            TEXT("BUTTON"),
            TEXT("Delete"),
            WS_CHILD |
            WS_VISIBLE |
            BS_PUSHBUTTON,
            250,
            90,
            100,
            25,
            hwnd,
            (HMENU)BTN_DEL,
            NULL,
            NULL);

        CreateWindow(
            TEXT("BUTTON"),
            TEXT("Clear"),
            WS_CHILD |
            WS_VISIBLE |
            BS_PUSHBUTTON,
            250,
            125,
            100,
            25,
            hwnd,
            (HMENU)BTN_CLR,
            NULL,
            NULL);
        break;
    }

    case WM_COMMAND:
    {
        switch(LOWORD(wParam))
        {
        case BTN_ADD:
        {
            TCHAR text[32];

            GetWindowText(
                hEdit,
                text,
                32);

            if(lstrlen(text)>0)
            {

                TCITEM item;
                ZeroMemory(
                    &item,
                    sizeof(item));
                item.mask =
                    TCIF_TEXT;
                item.pszText =
                    text;
                int count;
                count =
                    TabCtrl_GetItemCount(hTab);

                TabCtrl_InsertItem(
                    hTab,
                    count,
                    &item);
            }
            break;
        }

        case BTN_DEL:
        {
            int pos;
            pos =
              TabCtrl_GetCurSel(hTab);
            if(pos != -1)
            {
                TabCtrl_DeleteItem(
                    hTab,
                    pos);
            }
            break;
        }

        case BTN_CLR:
        {
            TabCtrl_DeleteAllItems(
                hTab);
            break;
        }
        }
        break;
    }

    case WM_NOTIFY:
    {

        LPNMHDR hdr;
        hdr=(LPNMHDR)lParam;
        if(hdr->idFrom == ID_TABCTRL)
        {
            if(hdr->code == TCN_SELCHANGE)
            {
                MessageBox(
                    hwnd,
                    TEXT("Tab changed"),
                    TEXT("Notification"),
                    MB_OK);
            }
            
            if(hdr->code == TCN_SELCHANGING)
            {
                // Tab is about to change
            }
        }
        break;
    }
    case WM_DESTROY:
        PostQuitMessage(0);
        break;

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

    return 0;
}