Thread: Simple win32 window class

There is no compilation errors. Though, the program is unable to create window after registering it. Any suggestions?

Code:

#include <windows.h>
#include <string>
using namespace std;

#define DisplayError(text, caption) MessageBox(NULL, text,caption, MB_ICONEXCLAMATION | MB_OK)

class Wnd
{
    WNDPROC WinControls;
    WNDCLASSEX wc;
    HWND hwnd;
    MSG Msg;
    string  WindowName;
    bool child;

    public:

		Wnd() { }

   void start(char * Tile , WNDPROC  Procedure  )
    {
        WindowName =  Tile;

    }

    bool WndPrepare( HINSTANCE hInstance, int menuID, bool Menubuild = false )
    {
        WNDCLASSEX wcex;

        wcex.cbSize = sizeof(WNDCLASSEX);
        wcex.style          = CS_NOCLOSE | CS_DBLCLKS;
        wcex.lpfnWndProc    = WinControls;
        wcex.cbClsExtra     = 0;
        wcex.cbWndExtra     = 0;
        wcex.hInstance      = hInstance;
        wcex.hIcon          = LoadIcon(NULL, IDI_APPLICATION);
        wcex.hCursor        = LoadCursor(NULL, IDC_ARROW);
        wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);
        if( Menubuild)
        wcex.lpszMenuName   = MAKEINTRESOURCE(menuID);
        else
        wcex.lpszMenuName   = NULL;
        wcex.lpszClassName  = (LPCWSTR)WindowName.c_str();
        wcex.hIconSm        = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_APPLICATION));

        if(!RegisterClassEx(&wcex))
        {
            DisplayError( L"HUGE ERROR MAN WINDOW CAN'T REGISTER)", L"ALERT" );
            return false;
        }
            return true;
    }

    void WndBuild( HINSTANCE * hInstance, int nCmdShow)
    {
        hwnd = CreateWindowEx(WS_EX_CLIENTEDGE, L"NarraDream",(LPCWSTR)WindowName.c_str(), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 240, 120, NULL, NULL, *hInstance, NULL);
        if(!hwnd)
        {
            DisplayError(L"Could not create Window",L"ALERT");
        }

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

    int Run(void)
    {
        while (GetMessage(&Msg, NULL, 0, 0) > 0)
        {
        TranslateMessage(&Msg);
        DispatchMessage(&Msg);
        }

        return (int)  Msg.wParam;
    }
};


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

        case WM_CLOSE:
            DestroyWindow(hwnd);
        break;
        case WM_DESTROY:
            PostQuitMessage(0);
        break;
        default:
            return DefWindowProc(hwnd, msg, wParam, lParam);
    }

    return 0;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,LPSTR lpCmdLine, int nCmdShow)
{
 Wnd wnd;
	 
  wnd.start("hey", WinProc);

 wnd.WndPrepare(0, false);

 wnd.WndBuild(&hInstance,nCmdShow);
  return ( wnd.Run() );

}