import win32gui
import win32process
from ctypes import *
from ctypes.wintypes import *

class MemPy:

    PROCESS_ALL_ACCESS = 0x1F0FFF
    rPM = ctypes.WinDLL('kernel32', use_last_error=True).ReadProcessMemory

    def __init__(self):
        self.hwnd = win32gui.FindWindow(None, 'Calculator')
        self.threadid, self.pid = win32process.GetWindowThreadProcessId(self.hwnd)
        self.process = windll.kernel32.OpenProcess(self.PROCESS_ALL_ACCESS, 0, self.pid)
        print(self.pid)
        self.rPM.argtypes = [HANDLE, LPCVOID, LPVOID, c_size_t, POINTER(c_size_t)]
        self.rPM.restyper = BOOL

    def readMemory(self, address):
        buffer = create_string_buffer(b'',4)
        nread = c_size_t()
        bytesRead = c_size_t()
        if self.rPM(self.process, hex(address), buffer, bytesRead, byref(nread)):
            print("[*] {}\t{}".format(hex(address), buffer.value))
        else:
            print('[!] Error: ', get_last_error())

mxl = MemPy()
mxl.readMemory(0x005DE724)

# Where 0x005DE724 is the address of the result bar.