HWND WINAPI DoCreateTabControl(HWND hwndParent) 
{ 
    RECT rcClient; 
    HWND hwndTab; 
    TCITEM tie; 
    int i; 

    // Get the dimensions of the parent window's client area, and 
    // create a tab control child window of that size. 
    GetClientRect(hwndParent, &rcClient); 
    InitCommonControls(); 
    hwndTab = CreateWindow( 
        WC_TABCONTROL, L"", 
        WS_CHILD | WS_CLIPSIBLINGS | WS_VISIBLE, 
        0, 0, rcClient.right, rcClient.bottom, 
        hwndParent, NULL, g_hinst, NULL 
        ); 
    if (hwndTab == NULL) 
        return NULL; 

    // Add tabs for each day of the week. 
    tie.mask = TCIF_TEXT | TCIF_IMAGE; 
    tie.iImage = -1; 
    tie.pszText = g_achTemp; 

    for (i = 0; i < 4; i++) { 
        //LoadString(g_hinst, ""IDS_FIRSTDAY + i, 
          //      g_achTemp, sizeof(g_achTemp)/sizeof(g_achTemp[0])); 

        if (TabCtrl_InsertItem(hwndTab, i, &tie) == -1) { 
            DestroyWindow(hwndTab); 
            return NULL; 
        } 
    } 

	TC_ITEM ti;

	ti.mask = TCIF_TEXT | TCIF_PARAM;
	ti.pszText = L"texto";
	ti.lParam = (LPARAM)  CreateWindowEx (0, L"STATIC", L"label", WS_VISIBLE | WS_CHILD,
				50, 50, 100,100, hwndTab,
				(HMENU) NULL, (HINSTANCE) GetModuleHandle (NULL), NULL);

	TabCtrl_InsertItem(hwndTab, 2, &ti);

    return hwndTab; 
}

Wollte in das 2te Tab Control das Label setzen - funzt aber so nicht - hat jemand vielleicht Beispielprogrammcode rumliegen oder sieht jemand was ich falsch mache?

Hier der ganze Code zum Rumspielen:

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

// Global variables 

HINSTANCE g_hinst;    // handle to application instance 
wchar_t g_achTemp[256];  // temporary buffer for strings 
//HWND g_hwndMain;      // main application window 
//HWND g_hwndTab;       // tab control 
//HWND g_hwndDisplay;   // handle to static control in 
//                      //   tab control's display area 

LRESULT CALLBACK WindowProc(HWND hwnd,
UINT msg,
WPARAM wparam,
LPARAM lparam)
{
        switch(msg)
        {
                case WM_DESTROY:
                PostQuitMessage(0);
                return 0;
                default: break;
        }

        return (DefWindowProc(hwnd, msg, wparam, lparam));
}

// DoCreateTabControl - creates a tab control, sized to fit the 
//     specified parent window's client area, and adds some tabs. 
// Returns the handle to the tab control. 
// hwndParent - parent window (the application's main window). 

HWND WINAPI DoCreateTabControl(HWND hwndParent) 
{ 
    RECT rcClient; 
    HWND hwndTab; 
    TCITEM tie; 
    int i; 

    // Get the dimensions of the parent window's client area, and 
    // create a tab control child window of that size. 
    GetClientRect(hwndParent, &rcClient); 
    InitCommonControls(); 
    hwndTab = CreateWindow( 
        WC_TABCONTROL, L"", 
        WS_CHILD | WS_CLIPSIBLINGS | WS_VISIBLE, 
        0, 0, rcClient.right, rcClient.bottom, 
        hwndParent, NULL, g_hinst, NULL 
        ); 
    if (hwndTab == NULL) 
        return NULL; 

    // Add tabs for each day of the week. 
    tie.mask = TCIF_TEXT | TCIF_IMAGE; 
    tie.iImage = -1; 
    tie.pszText = g_achTemp; 

    for (i = 0; i < 4; i++) { 
        //LoadString(g_hinst, ""IDS_FIRSTDAY + i, 
          //      g_achTemp, sizeof(g_achTemp)/sizeof(g_achTemp[0])); 

        if (TabCtrl_InsertItem(hwndTab, i, &tie) == -1) { 
            DestroyWindow(hwndTab); 
            return NULL; 
        } 
    } 

	TC_ITEM ti;

	ti.mask = TCIF_TEXT | TCIF_PARAM;
	ti.pszText = L"texto";
	ti.lParam = (LPARAM)  CreateWindowEx (0, L"STATIC", L"label", WS_VISIBLE | WS_CHILD,
				50, 50, 100,100, hwndTab,
				(HMENU) NULL, (HINSTANCE) GetModuleHandle (NULL), NULL);

	TabCtrl_InsertItem(hwndTab, 2, &ti);

    return hwndTab; 
} 

int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE  hPrevInstance,
LPSTR lpCmdline,
int nCmdShow)
{
	g_hinst = hInstance;

        WNDCLASSEX winclass;
        winclass.cbSize = sizeof(WNDCLASSEX);
        winclass.style = CS_VREDRAW | CS_HREDRAW | CS_OWNDC | CS_DBLCLKS;
        winclass.lpfnWndProc = WindowProc;
        winclass.cbClsExtra = 0;    // extra class info space
        winclass.cbWndExtra = 0;    // extra window info space
        winclass.hInstance = hInstance; // assign the application instance
        winclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
        winclass.hCursor = LoadCursor(NULL, IDC_ARROW);
        winclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
        winclass.lpszMenuName = NULL; // the name of the menu to attach
        winclass.lpszClassName = L"WINCLASS1"; // the name of the class itself
        winclass.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

        RegisterClassEx(&winclass);

		HWND hwnd;
        if((hwnd = CreateWindowEx(NULL,
        L"WINCLASS1",
        L"Fenstertitel",
        WS_OVERLAPPEDWINDOW | WS_VISIBLE,
        0,
        0,
        400,
        400,
        NULL, // handle to parent
        NULL, // handle to menu
        hInstance, // instance of this application
        NULL)) == NULL)
        return 0;

		DoCreateTabControl(hwnd);
        //UpdateWindow();

        MSG msg;
        while(GetMessage(&msg, NULL, 0, 0))
        {
                // translate any accelerator keys
                TranslateMessage(&msg);

                // send the message to the window proc
                DispatchMessage(&msg);
        }

        return 0;
}

Nee so geht das nicht :p ... Man erstellt erst das Tab-Control, fügt dann Items
hinzu, setzt dann Dialoge, auf denen man zu guter Letzt die Child-Controls
plaziert.

Hier ist n Turorial .

ich will keine Resourcen verwenden - nur reines WinAPI

Wo ist das Problem ?

if((nCurSel >= 0) && (nCurSel <= 1))
  ShowWindow(phDlg[nCurSel], SW_HIDE);

wtf? das ist doch nicht ernst gemeint - oder - ich soll alle Controls verstecken und nur die Anzeigen die auf dem jeweiligen Tab sichtbar sein sollen - das kanns doch nicht sein - hat dieses Tab Control nicht selber eigene Verwaltungfunktionen für sowas?

Du kannst sie auch alle platt machen (DestroyWindow) um Speicher zu sparen und später wieder erstellen...aber um diesen Mechanismus kommste mit reiner WinAPI nit herum :p .