A simple windows program

Not used for a long timeC LanguageWrite windowsProgramNow, I am very interested today. Let's write an exercise as a trainer. If you want to learn about VC, you need to understand the system's API. In the future, I will take a look at the "windows programming" book to improve my internal strength. :)

# Include <windows. h>

Lresult callback wndproc (hwnd, uint, wparam, lparam );

Int winapi winmain (hinstance, hinstance hprevinstance,

Pstr szcmdline, int icmdshow)

{

Static tchar szappname [] = text ("hellowin ");

Hwnd;

MSG;

Wndclaswndclass;

Wndclass. Style = cs_hredraw | cs_vredraw;

Wndclass. lpfnwndproc = wndproc;

Wndclass. cbclsextra = 0;

Wndclass. cbwndextra = 0;

Wndclass. hinstance = hinstance;

Wndclass. hicon = loadicon (null, idi_application );

Wndclass. hcursor = loadcursor (null, idc_arrow );

Wndclass. hbrbackground = (hbrush) getstockobject (white_brush );

Wndclass. lpszmenunam = NULL;

Wndclass. lpszclassname = szappname;

If (! Registerclass (& wndclass ))

{

MessageBox (null, text ("this program requires Windows NT! "),

Szappname, mb_iconerror );

Return 0;

}

Hwnd = createwindow (szappname, // window class name

Text ("the hello program"), // window caption

Ws_overlappedwindow, // window style

Cw_usedefault, // initial X position

Cw_usedefault, // initial y position

Cw_usedefault, // initial X size

Cw_usedefault, // initial y size

Null, // parent window handle

Null, // Window menu handle

Hinstance, // program instance handle

Null); // creation Parameters



Showwindow (hwnd, icmdshow );

Updatewindow (hwnd );



While (getmessage (& MSG, null, 0, 0 ))

{

Translatemessage (& MSG );

Dispatchmessage (& MSG );

}

Return msg. wparam;

}

Lresult callback wndproc (hwnd, uint message, wparam, lparam)

{

HDC;

Paintstruct pS;

Rect;



Switch (Message)

{

Case wm_create:

Playsound (text ("hellowin.wav"), null, snd_filename | snd_async );

Return 0;

Case wm_paint:

HDC = beginpaint (hwnd, & PS );



Getclientrect (hwnd, & rect );



Drawtext (HDC, text ("Hello, Windows 98! "),-1, & rect,

Dt_singleline | dt_center | dt_vcenter );

Endpaint (hwnd, & PS );

Return 0;



Case wm_destroy:

Postquitmessage (0 );

Return 0;

}

Return defwindowproc (hwnd, message, wparam, lparam );

}