Windows应用程序结构

解决”char []"转换为"LPCWSTR"：

①利用L" "或_T(" ")

②项目——属性——常规——字符集——使用多字节字符集

#include<windows.h>
#include<tchar.h>

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);


int WINAPI WinMain(HINSTANCE hInsance, HINSTANCE PreInstance, LPSTR lpCmdLine, int nCmdShow)
{
    HWND hwnd;
    HINSTANCE hInstance;
    MSG msg;
    char lpszClassName[] = "窗口";
    WNDCLASS wc;
    wc.style = 0;
    wc.lpfnWndProc = WndProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    wc.lpszMenuName = NULL;
    wc.lpszClassName = "lpszClassName";

    RegisterClass(&wc);

    hwnd = CreateWindow(lpszClassName, "Windows", WS_OVERLAPPEDWINDOW, 120, 50, 800, 600, NULL, NULL, hInstance, NULL);

    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);

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

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_LBUTTONDOWN:
    {
        MessageBeep(0);
    }
    break;

    case WM_DESTROY:
        PostQuitMessage(0);
        break;

    default:
        return DefWindowProc(hwnd, message, wParam, lParam);
    }
    return 0;
}

#include<windows.h>
#include<tchar.h>
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInsance, HINSTANCE PreInstance, LPSTR lpCmdLine, int nCmdShow)
//{
//    HWND hwnd;
//    HINSTANCE hInstance;
//    MSG msg;
//    char lpszClassName[] = "窗口";
//    WNDCLASS wc;
//    wc.style = 0;
//    wc.lpfnWndProc = WndProc;
//    wc.cbClsExtra = 0;
//    wc.cbWndExtra = 0;
//    wc.hInstance = hInstance;
//    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
//    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
//    wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
//    wc.lpszMenuName = NULL;
//    wc.lpszClassName = "lpszClassName";
//
//    RegisterClass(&wc);
//
//    hwnd = CreateWindow(lpszClassName, "Windows", WS_OVERLAPPEDWINDOW, 120, 50, 800, 600, NULL, NULL, hInstance, NULL);
//
//    ShowWindow(hwnd, nCmdShow);
//    UpdateWindow(hwnd);
//
//    while (GetMessage(&msg, NULL, 0, 0))
//    {
//        TranslateMessage(&msg);
//        DispatchMessage(&msg);
//    }
//    return msg.wParam;
//}

{
    HWND hwnd1;
    HWND hwnd2;
    HWND hwnd3;

    HINSTANCE hInstance;

    MSG msg;

    char lpszClassName1[] = "窗口1";
    WNDCLASS wc1;
    wc1.style = 0;
    wc1.style = 0;
        wc1.lpfnWndProc = WndProc;
        wc1.cbClsExtra = 0;
        wc1.cbWndExtra = 0;
        wc1.hInstance = hInstance;
        wc1.hIcon = LoadIcon(NULL, IDI_APPLICATION);
        wc1.hCursor = LoadCursor(NULL, IDC_ARROW);
        wc1.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
        wc1.lpszMenuName = NULL;
        wc1.lpszClassName = "lpszClassName";

        RegisterClass(&wc1);

        char lpszClassName2[] = "窗口2";
        WNDCLASS wc2;
        wc2.style = 0;
        wc2.style = 0;
        wc2.lpfnWndProc = WndProc;
        wc2.cbClsExtra = 0;
        wc2.cbWndExtra = 0;
        wc2.hInstance = hInstance;
        wc2.hIcon = LoadIcon(NULL, IDI_APPLICATION);
        wc2.hCursor = LoadCursor(NULL, IDC_ARROW);
        wc2.hbrBackground = (HBRUSH)GetStockObject(GRAY_BRUSH);
        wc2.lpszMenuName = NULL;
        wc2.lpszClassName = "lpszClassName";

        RegisterClass(&wc2);

        hwnd1 = CreateWindow(lpszClassName1, "Windows1", WS_OVERLAPPEDWINDOW, 120, 50, 800, 600, NULL, NULL, hInstance, NULL);
        hwnd2 = CreateWindow(lpszClassName2, "Windows2", WS_OVERLAPPEDWINDOW, 120, 50, 800, 600, NULL, NULL, hInstance, NULL);
        hwnd3 = CreateWindow(lpszClassName1, "Windows3", WS_OVERLAPPEDWINDOW, 120, 50, 800, 600, NULL, NULL, hInstance, NULL);

        ShowWindow(hwnd1, nCmdShow);
        UpdateWindow(hwnd1);

        ShowWindow(hwnd2, nCmdShow);
        UpdateWindow(hwnd2);

        ShowWindow(hwnd3, nCmdShow);
        UpdateWindow(hwnd3);

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

}

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_LBUTTONDOWN:
    {
        MessageBeep(0);
    }
    break;

    case WM_DESTROY:
        PostQuitMessage(0);
        break;

    default:
        return DefWindowProc(hwnd, message, wParam, lParam);
    }
    return 0;
}

 Windows程序组成部分：

头文件、源文件（程序员）、动态链接库、资源

　　源文件：

　　主函数：WinMain:创建应用程序窗口和建立消息循环（4个API函数用来创建和显示应用程序窗口，3个用来建立消息循环）

int WINAPI WinMain
(
HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nCmdShow
);

int WINAPI WinMain(HINSTANCE hInsance, HINSTANCE PreInstance, LPSTR lpCmdLine, int nCmdShow)
{
    HWND hwnd1;

    HINSTANCE hInstance;

    MSG msg;

    char lpszClassName1[] = "窗口1";
    WNDCLASS wc1;
    wc1.style = 0;
    wc1.style = 0;
        wc1.lpfnWndProc = WndProc;
        wc1.cbClsExtra = 0;
        wc1.cbWndExtra = 0;
        wc1.hInstance = hInstance;
        wc1.hIcon = LoadIcon(NULL, IDI_APPLICATION);
        wc1.hCursor = LoadCursor(NULL, IDC_ARROW);
        wc1.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
        wc1.lpszMenuName = NULL;
        wc1.lpszClassName = "lpszClassName";

        RegisterClass(&wc1);

        hwnd1 = CreateWindow(lpszClassName1, "Windows1", WS_OVERLAPPEDWINDOW, 120, 50, 800, 600, NULL, NULL, hInstance, NULL);

        ShowWindow(hwnd1, nCmdShow);
        UpdateWindow(hwnd1);

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

}

 　　窗口函数：以参数的方式接受系统传递来的消息并对消息进行分类处理。

LPESULT CALLBACK WndProc
(
 HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam   
)

LRESULT CALLBACK WndProc
(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_LBUTTONDOWN:
    {
        MessageBeep(0);
    }
    break;

    case WM_DESTROY:
        PostQuitMessage(0);
        break;

    default:
        return DefWindowProc(hwnd, message, wParam, lParam);
    }
    return 0;
}

　　Windows系统、主函数、窗口函数之间的关系：

高内聚、低耦合：

利用函数或类的封装性来实现功能上的高内聚；利用指针或类似指针的索引的隔离功能来实现信息流的低耦合。