[RESOLVED] CreateWindowEx fails with 1407 error cannot find window class

When i try to create a listview (in red in the code) i have the 1407 error that means cannot find window class but the listbox is created !!!, i am using visual c++ 6.0.

Code:

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#include "stdafx.h"
#include <stdio.h>
#include <windows.h>
#include <windowsx.h>
#include <winuser.h>
#include <commctrl.h>
#define WIN32_LEAN_AND_MEAN
/*  Declare Windows procedure*/
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
/*  Make the class name into a global variable  */
char szClassName[ ] = "tools";

HWND IDC_LIST_SMS, IDC_STATUS_BAR, IDC_BOX_SMS;
HWND Ghwnd;
HINSTANCE HInst;
int WINAPI WinMain (HINSTANCE hThisInstance,
                    HINSTANCE hPrevInstance,
                    LPSTR lpszArgument,
                    int nFunsterStil)

{
    HWND hwnd;              /* This is the handle for our window */
    MSG messages;            /* Here messages to the application are saved */
    WNDCLASSEX wincl;        /* Data structure for the windowclass */

    /* The Window structure */
    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure;      /* This function is called by windows */
    wincl.style = CS_DBLCLKS;                /* Catch double-clicks */
    wincl.cbSize = sizeof (WNDCLASSEX);

    /* Use default icon and mouse-pointer */
    wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
    wincl.lpszMenuName = NULL;                /* No menu */
    wincl.cbClsExtra = 0;                      /* No extra bytes after the window class */
    wincl.cbWndExtra = 0;                      /* structure or the window instance */
    /* Use Windows's default color as the background of the window */
    wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;

    /* Register the window class, and if it fails quit the program */
    if (!RegisterClassEx (&wincl))
        return 0;

    /* The class is registered, let's create the program*/
    hwnd = CreateWindowEx (
          0,                  /* Extended possibilites for variation */
          szClassName,        /* Classname */
          "Gsm tools",      /* Title Text */
          WS_OVERLAPPEDWINDOW, /* default window */
          CW_USEDEFAULT,      /* Windows decides the position */
          CW_USEDEFAULT,      /* where the window ends up on the screen */
          640,                /* The programs width */
          480,                /* and height in pixels */
          HWND_DESKTOP,        /* The window is a child-window to desktop */
          NULL,                /* No menu */
          hThisInstance,      /* Program Instance handler */
          NULL                /* No Window Creation data */
          );
    Ghwnd = hwnd;     
    HInst = hThisInstance;
   
    /* Make the window visible on the screen */
    ShowWindow (hwnd, nFunsterStil);

    /* Run the message loop. It will run until GetMessage() returns 0 */
    while (GetMessage (&messages, NULL, 0, 0))
    {
        /* Translate virtual-key messages into character messages */
        TranslateMessage(&messages);
        /* Send message to WindowProcedure */
        DispatchMessage(&messages);
    }

    /* The program return-value is 0 - The value that PostQuitMessage() gave */
    return messages.wParam;
}

LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)                  /* handle the messages */
    {
        case WM_CREATE:
            RECT Rect;
            GetClientRect(hwnd, &Rect);
          IDC_LIST_SMS = CreateWindowEx(0L, WC_LISTVIEW, "", WS_VISIBLE | WS_CHILD | LVS_REPORT,  0, 0, Rect.right-Rect.left - 300, Rect.bottom - Rect.top - 20, hwnd, NULL, HInst, NULL);
            if(IDC_LIST_SMS ==NULL)
            {
                char coderrno[126];
                sprintf(coderrno,"%d",GetLastError());
                MessageBox(NULL,coderrno,"",MB_OK);
            }
            IDC_BOX_SMS = CreateWindowEx(0L, "ListBox", "", WS_VISIBLE | WS_CHILD | LBS_EXTENDEDSEL | LBS_OWNERDRAWVARIABLE | LBS_HASSTRINGS ,Rect.right-Rect.left - 300 , 0, 300, Rect.bottom - Rect.top - 20, hwnd, NULL, HInst, NULL);
......
    }
}

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Don't you call InitCommonControlsEx before creating list control? You must!
See How to Create a List-View Control

Thank you very much, i didn't code in win32 since 6 years, i forgot some basics ;).