Shaping the windows

I just found this very cool code! I found out that MFC is good of course, but an empty Win32 would be much better, there are so much more opportunities in it. Although I can't see the dialog itself and arrange all the control elements on the form, I can do it through the code.
Therefore, I found a code to actually change the shape of the window. You would only need an original bmp image with a shape. In bmp format, the compiler sees white as blank space, so I can actually draw the shape of my window. I would just need the following code:

BOOL CreateMainWnd(HINSTANCE hInstance)
{
    HFONT buttonfont;    /*create windows and set fonts*/
    hwMain = CreateWindowEx(0,"Window Shaping","Window Shaping", WS_OVERLAPPED,50,50,450,350,0,0,hInstance,0);
    hwStatica = CreateWindowEx(0,"Button","Sant Bani",WS_CHILD | WS_VISIBLE | SS_CENTER, 100,88,50,20,hwMain,0,hInstance,0);
    hwStaticb = CreateWindowEx(0,"Button","Exit",WS_CHILD | WS_VISIBLE | SS_CENTER, 194,88,50,20,hwMain,0,hInstance,0);
    buttonfont = CreateFont(16,0,FW_DONTCARE,FW_DONTCARE,FW_DONTCARE,
        FALSE,FALSE,FALSE,ANSI_CHARSET,OUT_DEFAULT_PRECIS,
        CLIP_DEFAULT_PRECIS,DEFAULT_QUALITY,FF_DONTCARE,"Arial");
   
    SendMessage(hwStatica,WM_SETFONT,reinterpret_cast(buttonfont),MAKELPARAM(1, 0));
    SendMessage(hwStaticb,WM_SETFONT,reinterpret_cast(buttonfont),MAKELPARAM(1, 0));
   
    SetWindowPos(hwMain,HWND_TOPMOST,50,50,626,374, NULL);
   
    ShowWindow(hwMain,1);

    if(!hwMain)
        return FALSE;
    return TRUE;
}

LRESULT CALLBACK WindowProc(HWND hWnd, UINT wMsg, WPARAM wParam, LPARAM lParam)
{
    switch(wMsg) {
    case WM_DESTROY:
        PostQuitMessage(0);    /*destroy window*/
        return 0;
        break;
    case WM_PAINT:
        HDC hdcTemp, bpHDC;
        PAINTSTRUCT sentinel;
        BITMAP bm;
        bpHDC = BeginPaint(hwMain, &sentinel);
        if(work)    /*if its our first time painting, shape the window*/
        {
            ShowWindow(hwMain,0);    /* window not visible until shaped*/
            Mold(bpHDC);
            ShowWindow(hwMain,1);
        }
        hdcTemp = CreateCompatibleDC(bpHDC);    /*load and bitblt image to our hdc*/
        hwBmp = LoadBitmap(hInst,MAKEINTRESOURCE(102));
        SelectObject(hdcTemp,static_cast(hwBmp));
        GetObject(static_cast(hwBmp),sizeof(bm),&bm);
        BitBlt(bpHDC,0,-30,bm.bmWidth,bm.bmHeight,hdcTemp,0,0,SRCCOPY);
        DeleteDC(bpHDC);    /*delete uneeded objects to free up memory*/
        DeleteDC(hdcTemp);
        EndPaint(hwMain,&sentinel);
        return 0;
        break;
    case WM_COMMAND:
/*put a couple of buttons there, just for fun*/
        if(wParam == BN_CLICKED)
        {
            if(reinterpret_cast(lParam) == hwStatica)
                ShellExecute(NULL, "open", "http://www.santbani.org", NULL, NULL, SW_SHOWNORMAL);
            else if(reinterpret_cast(lParam) == hwStaticb)
                DestroyWindow(hwMain);
        }
    return 0;
    break;
    case WM_LBUTTONDOWN:
        SendMessage(hwMain,WM_SYSCOMMAND,SC_MOVE,0);    /*tell the window the user wants to move the window*/
    break;
    default:
        return DefWindowProc(hWnd,wMsg,wParam,lParam);
    }
return FALSE;
}

And all the other usual code routines.
I also found out I need to include "windows.h" in any windows application I do. There is also a huge code for just creating a new window and showing it on the screen, which I am trying to understand by lines now. It seems not so hard, but really cool!