DirectX не запускается проект!

#include <Windows.h>
#include <d3d9.h>
#pragma comment(lib, "d3d9.lib") 
#pragma comment(lib, "d3dx9.lib") 
//directX 3D initialize
LPDIRECT3D9 pDirect3D = NULL;
LPDIRECT3DDEVICE9 pDirect3dDevice = NULL;
HRESULT InitialDirect3D(HWND hwnd)
{
    if (NULL == (pDirect3D = Direct3DCreate9(D3D_SDK_VERSION)))
        return E_FAIL;
    D3DDISPLAYMODE Display;
    if (FAILED(pDirect3D -> GetAdapterDisplayMode(D3DADAPTER_DEFAULT, &Display)))
        return E_FAIL;
    D3DPRESENT_PARAMETERS Direct3DParametr;
    ZeroMemory(&Direct3DParametr, sizeof(Direct3DParametr));
    Direct3DParametr.Windowed = TRUE;
    Direct3DParametr.SwapEffect = D3DSWAPEFFECT_DISCARD;
    Direct3DParametr.BackBufferFormat = Display.Format;
    
if(FAILED(pDirect3D -> CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hwnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING, &Direct3DParametr, &pDirect3dDevice)))
     return E_FAIL;
    return S_OK;
}
VOID RenderingDirect3D()
{
    if (pDirect3dDevice == NULL)
     return;
    pDirect3dDevice -> Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(255,255,0), 1.0f, 0);
    pDirect3dDevice -> BeginScene();
    pDirect3dDevice -> EndScene();
    pDirect3dDevice -> Present(NULL, NULL, NULL, NULL);
}
VOID DelteDirect3D()
{
    if (pDirect3dDevice != NULL)
        pDirect3dDevice -> Release();
    if (pDirect3dDevice != NULL)
        pDirect3D -> Release();
}
LRESULT CALLBACK MainWinProc(HWND hwnd,
                             UINT msg,
                             WPARAM wparam,
                             LPARAM lparam)
{
    switch(msg)
    {
    case WM_PAINT:
        //--------
        RenderingDirect3D();
        ValidateRect(hwnd, NULL);
        //--------
        break;
    case WM_DESTROY:
        {
            PostQuitMessage(0);
            return 0;
        }
        break;
        return (DefWindowProc(hwnd, msg, wparam, lparam));
    }
}
int WINAPI WinMain(HINSTANCE hinstance,
                 HINSTANCE hprevinstance,
                 LPSTR lpCmdLine,
                 int nCmdShow
                 )
{
    WNDCLASSEX windowsclass;
    HWND hwnd;
    MSG msg;
    windowsclass.cbSize = sizeof(WNDCLASSEX);
    windowsclass.style = CS_VREDRAW|CS_HREDRAW|CS_OWNDC|CS_DBLCLKS;
    windowsclass.lpfnWndProc = MainWinProc;
    windowsclass.cbClsExtra = 0;
    windowsclass.cbWndExtra = 0;
    windowsclass.hInstance = hinstance;
    windowsclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    windowsclass.hCursor = LoadCursor(NULL, IDC_ARROW);
    windowsclass.hbrBackground = (HBRUSH)GetStockObject(GRAY_BRUSH);
    windowsclass.lpszMenuName = NULL;
    windowsclass.lpszClassName = "WINDOWSCLASS";
    //------
    if (!RegisterClassEx(& windowsclass))
        return (0);
    //------
    if (!(hwnd = CreateWindowEx(NULL, "WINDOWSCLASS", "Инициализация DirectX3D", WS_OVERLAPPED|WS_VISIBLE, 300, 150, 500, 400,NULL, NULL, hinstance, NULL)))
return (0);
    if (SUCCEEDED(InitialDirect3D(hwnd)))
    {
        ShowWindow(hwnd, nCmdShow);
        UpdateWindow(hwnd);
        while(GetMessage(&msg, NULL, 0, 0))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }
}

//обнули класс-окна
//так
WNDCLASSEX windowsclass = {0};
//или
ZeroMemory(&windowsclass, sizeof(windowsclass));