Win32.01. the simplest Windows Application

1 /*
2 The simplest Windows ApplicationProgram
3 As you may think, this is the simplest windows application. It only starts a form, but it has basic functions such as maximization, minimization, Window Scaling, and closing.
4 This is a standard Windows application, on which we can expand to implement more complex applications, such as adding new controls, menus, multiple forms, and even plotting.
5
6 For Windows programs, you must register the window class (10 parameters, including the window handler). Then, createwindow, showwindow, and updatewindow implement the window.
7 And then enable message loop (transmission, distribution). Note that the message processing function must process the wm_destroy message.
8 For more information about the message processing mechanism of windows, Hou Jie's book "an in-depth introduction to MFC" is also available for reference.
9
10 Program from programming windows, author chales Petzold, this program is just a memo. 2010-07-18 Phoenix @ Home
11 */
12 # Include < Windows. h >
13
14 Lresult callback wndproc (hwnd, uint message, wparam, lparam)
15 {
16 Switch (Message)
17 {
18 Case Wm_destroy:
19 Postquitmessage ( 0 );
20 Return   0 ;
21 }
22 Return Defwindowproc (hwnd, message, wparam, lparam );
23 }
24
25 Int _ Stdcall winmain (hinstance, hinstance hprevinstance, lpstr lpcmdline, Int Nshowcmd)
26 {
27 Tchar szappname [] = L " Simplewindow " ;
28 MSG;
29 Hwnd hwndmain;
30 Wndclass;
31
32 // The wndclass structure has 10 members. You must set all the members to register successfully.
33 Wndclass. lpszclassname = Szappname;
34 Wndclass. hicon = Loadicon (null, idi_application );
35 Wndclass. hcursor = Loadcursor (null, idc_arrow );
36 Wndclass. lpfnwndproc = Wndproc; // Message Processing Process of the specified window
37 Wndclass. hinstance = Hinstance;
38 Wndclass. cbclsextra =   0 ;
39 Wndclass. cbwndextra =   0 ;
40 Wndclass. Style = Cs_hredraw | Cs_vredraw;
41 Wndclass. lpszmenuname = NULL;
42 Wndclass. hbrbackground = (Hbrush) getstockobject (white_brush );
43
44 If ( ! Registerclass ( & Wndclass )) // Registration window class
45 {
46 MessageBox (null, text ( " This program requires Windows NT. " ), Text ( " Windows NT required " ), Mb_iconstop );
47 Return   0 ;
48 }
49
50 // Createwindow, showwindow, updatewindow: create a window, display and update the window view
51 Hwndmain = Createwindow (szappname, text ( " The simple Windows Application " ), Ws_overlappedwindow,
52 Cw_usedefault,
53 Null, null, hinstance, null );
54 Showwindow (hwndmain, nshowcmd );
55 Updatewindow (hwndmain );
56
57 // Message loop: starts a message loop.
58 While (Getmessage ( & MSG, null, 0 , 0 ))
59 {
60 Translatemessage ( & MSG );
61 Dispatchmessage ( & MSG );
62 }
63
64 Return MSG. wparam;
65 }