python调用dll

调用CALLBACK标记的dll方法要用dll = ctypes.windll.LoadLibrary( 'test.dll' )

没有CALLBACK的方法用dll = ctypes.cdll.LoadLibrary( 'test.dll' )

 

例子：

from ctypes import *

d2d = cdll.LoadLibrary("Direct2dDll.dll")

print(d2d.DCreateWindow)



CALLBACK = CFUNCTYPE(c_int,c_int)



def py_cmp_func(a):

    print(str(a))

    return 0;

    

callBackFunc = CALLBACK(py_cmp_func)



d2d.SetCallBack(callBackFunc)

d2d.DCreateWindow()

// Direct2dDll.cpp : 定义 DLL 应用程序的导出函数。

//



#include "stdafx.h"

#include <Windows.h>

#include <stdio.h>

#include "Draw.h"



int (*CallBack)(int);



void SetCallBack(int (*fun)(int))

{

    (*fun)(0);

    CallBack = fun;

}



//

//  函数: WndProc(HWND, UINT, WPARAM, LPARAM)

//

//  目的: 处理主窗口的消息。

//

//  WM_COMMAND    - 处理应用程序菜单

//  WM_PAINT    - 绘制主窗口

//  WM_DESTROY    - 发送退出消息并返回

//

//

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)

{

    (*CallBack)((int)message);

    int wmId, wmEvent;

    PAINTSTRUCT ps;

    HDC hdc;



    switch (message)

    {

    case WM_PAINT:

        hdc = BeginPaint(hWnd, &ps);

        // TODO: 在此添加任意绘图代码...

        EndPaint(hWnd, &ps);

        break;

    case WM_DESTROY:

        PostQuitMessage(0);

        break;

    default:

        return DefWindowProc(hWnd, message, wParam, lParam);

    }

    return 0;

}



HWND DCreateWindow()

{

    HINSTANCE instance = GetModuleHandle(0);



    TCHAR szWindowClass[] = L"pw";            // 主窗口类名



    WNDCLASSEX wcex;



    wcex.cbSize = sizeof(WNDCLASSEX);

    printf("2");

    wcex.style            = CS_HREDRAW | CS_VREDRAW;

    wcex.lpfnWndProc    = WndProc;

    wcex.cbClsExtra        = 0;

    wcex.cbWndExtra        = 0;

    wcex.hInstance        = instance;

    wcex.hIcon            = 0;//LoadIcon(hInstance, MAKEINTRESOURCE(IDI_WIN32PROJECT1));

    wcex.hCursor        = LoadCursor(NULL, IDC_ARROW);

    wcex.hbrBackground    = (HBRUSH)(COLOR_WINDOW+1);

    wcex.lpszMenuName    = 0;//MAKEINTRESOURCE(IDC_WIN32PROJECT1);

    wcex.lpszClassName    = szWindowClass;

    wcex.hIconSm        = 0;//LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));



    RegisterClassEx(&wcex);

    printf("3");

    HWND hWnd = CreateWindow(szWindowClass, L"title", WS_OVERLAPPEDWINDOW,

                  CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, instance, NULL);

    printf("4");

    ShowWindow(hWnd, SW_MAXIMIZE);

    UpdateWindow(hWnd);



       

    MSG msg;

    // 主消息循环:

    while (GetMessage(&msg, NULL, 0, 0))

    {

        if (!TranslateAccelerator(msg.hwnd, 0, &msg))

        {

            TranslateMessage(&msg);

            DispatchMessage(&msg);

        }

    }



    return hWnd;

}