Python使用Windows API创建窗口

import win32gui
from win32con import *
def WndProc(hwnd,msg,wParam,lParam):
if msg == WM_PAINT:
hdc,ps = win32gui.BeginPaint(hwnd)
rect = win32gui.GetClientRect(hwnd)
win32gui.DrawText(hdc,'GUI Python',len('GUI Python'),rect,DT_SINGLELINE|DT_CENTER|DT_VCENTER)
win32gui.EndPaint(hwnd,ps)
if msg == WM_DESTROY:
win32gui.PostQuitMessage(0)
return win32gui.DefWindowProc(hwnd,msg,wParam,lParam)
wc = win32gui.WNDCLASS()
wc.hbrBackground = COLOR_BTNFACE + 1
wc.hCursor = win32gui.LoadCursor(0,IDI_APPLICATION)
wc.lpszClassName = "Python no Windows"
wc.lpfnWndProc = WndProc
reg = win32gui.RegisterClass(wc)
hwnd = win32gui.CreateWindow(reg,'Python',WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,0,0,0,None)
win32gui.ShowWindow(hwnd,SW_SHOWNORMAL)
win32gui.UpdateWindow(hwnd)
win32gui.PumpMessages()