MFC（一）——Windows程序内部运行原理

1
2
3
4
5
6
7
8
typedef struct tagMSG{
    HWND hwnd;
    UINT message;
    WPARAM wParam;
    LPARAM lParam;
    DWORD time;
    POINT pt;
} MSG, *pMSG;

1
2
3
4
5
6
int WINAPI WinMain(
    HINSTANCE hInstance,
    HINSTANCE hPreInstance,
    LPSTR lpCmdLine,
    int nCmdShow
);

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
#include <windows.h>
#include <stdio.h>

LRESULT CALLBACK WinSumProc(
    HWND hwnd,
    UINT uMsg,
    WPARAM wParam,
    LPARAM lParam
);

int WINAPI WinMain(
    HINSTANCE hInstance,
    HINSTANCE hPreInstance,
    LPSTR lpCmdLine,
    int nCmdShow
) {
    WNDCLASS wndcls;
    wndcls.cbClsExtra = 0;
    wndcls.cbWndExtra = 0;
    wndcls.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
    wndcls.hCursor = LoadCursor(NULL, IDC_CROSS);
    wndcls.hIcon = LoadIcon(NULL, IDI_ERROR);
    wndcls.hInstance = hInstance;
    wndcls.lpfnWndProc = WinSumProc;
    wndcls.lpszClassName = "Flaming";
    wndcls.lpszMenuName = NULL;
    wndcls.style = CS_HREDRAW | CS_VREDRAW;
    RegisterClass(&wndcls);

    HWND hwnd;
    hwnd = CreateWindow("Flaming", "Hello,World", WS_OVERLAPPEDWINDOW, 0, 0, 600, 400, NULL, NULL, hInstance, NULL);

    ShowWindow(hwnd, SW_SHOWNORMAL);
    UpdateWindow(hwnd);

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

LRESULT CALLBACK WinSumProc(
    HWND hwnd,
    UINT uMsg,
    WPARAM wParam,
    LPARAM lParam
) {
    switch (uMsg) {
    case WM_CHAR:
        char szChar[20];
        sprintf(szChar, "char is %d", wParam);
        MessageBox(hwnd, szChar, "Flaming", 0);
        break;
    case WM_LBUTTONDOWN:
        MessageBox(hwnd, "mouse clicked", "Flaming", 0);
        HDC hdc;
        hdc = GetDC(hwnd);
        TextOut(hdc, 0, 50, "Hello,world", strlen("Hello,world"));
        ReleaseDC(hwnd, hdc);
        break;
    case WM_PAINT:
        HDC hDC;
        PAINTSTRUCT ps;
        hDC = BeginPaint(hwnd, &ps);
        TextOut(hDC, 0, 0, "Hello!", strlen("Hello!"));
        EndPaint(hwnd, &ps);
        break;
    case WM_CLOSE:
        if (IDYES == MessageBox(hwnd, "是否真的结束?", "Flaming", MB_YESNO)) {
            DestroyWindow(hwnd);
        }
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hwnd, uMsg, wParam, lParam);
    }
    return 0;
}