[Código-GUI] Cambiar titulo - JaAViEr

#include <windows.h>
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
char szClassName[ ] = "windowsclass";
HINSTANCE miinstance;

int WINAPI WinMain (HINSTANCE hThisInstance, HINSTANCE hPrevInstance, LPSTR lpszArgument, int nCmdShow)
{
    HWND hwnd;
    MSG messages;
    WNDCLASSEX wincl;
    miinstance=hThisInstance;

    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure;
    wincl.style = CS_DBLCLKS;
    wincl.cbSize = sizeof (WNDCLASSEX);

    wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
    wincl.lpszMenuName = NULL;
    wincl.cbClsExtra = 0;
    wincl.cbWndExtra = 0;
    wincl.hbrBackground = CreateSolidBrush(RGB(192,192,192));

    if (!RegisterClassEx (&wincl))return 0;

    hwnd = CreateWindowEx (
        0,
        szClassName,
        "Change Title::Javier",
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        400,
        200,
        HWND_DESKTOP,
        NULL,
        hThisInstance,
        NULL);

    ShowWindow (hwnd, nCmdShow);

    while (GetMessage (&messages, NULL, 0, 0))
    {
        TranslateMessage(&messages);
        DispatchMessage(&messages);
    }
    return messages.wParam;
}


LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
        char texto[50],textos[50];
            case WM_CREATE:
            static HWND mensaje = CreateWindowEx(1, "STATIC", "Inicio : ", WS_CHILD|WS_VISIBLE, 0, 0, 80, 25, hwnd, 0, miinstance, NULL);
            static HWND mensajex = CreateWindowEx(1, "STATIC", "Fin : ", WS_CHILD|WS_VISIBLE, 0, 25, 80, 25, hwnd, 0, miinstance, NULL);
            static HWND string = CreateWindowEx(1, "EDIT", NULL, WS_CHILD|WS_VISIBLE|WS_TABSTOP, 100, 0, 210, 24, hwnd, 0, miinstance, NULL);
            static HWND strings = CreateWindowEx(1, "EDIT", NULL, WS_CHILD|WS_VISIBLE|WS_TABSTOP, 100, 25, 210, 24, hwnd, 0, miinstance, NULL);
            static HWND boton = CreateWindowEx(0, "BUTTON", "Listo!", WS_CHILD|WS_VISIBLE|WS_TABSTOP|WS_BORDER, 0, 60, 80, 20, hwnd, 0, miinstance, NULL);
            break;
     case WM_COMMAND:
              GetWindowText(string,texto,50);
         GetWindowText(strings,textos,50);
     if((HWND)lParam==boton){
hwnd = FindWindow(NULL, texto);
if (hwnd != 0)
{
    SetWindowText(hwnd, textos);
    MessageBox(hwnd, "Titulo Cambiado !", "Resultado", MB_OK);
}else{
    MessageBox(hwnd, "Titulo No Encontrado !", "Resultado", MB_OK);
}
}
     break;
        case WM_DESTROY:
            PostQuitMessage (0);
            break;
        default:
            return DefWindowProc (hwnd, message, wParam, lParam);
    }
    return 0;
}