D:\cppCodes\HelloWindows\HelloWindows.c++
1 //++++++++++++++++++++++++++
2 // HelloWindows.cpp
3 //++++++++++++++++++++++++++
4
5
6 ///#include headers
7 #include <windows.h>
8
9 ///declare CALLBACK
10 LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
11
12 ///declare func/var
13 TCHAR szClassName[] = TEXT("hellowindows");//for RegisterClassEx then CreateWindow
14
15 ///WinMain
16 int WINAPI WinMain(HINSTANCE hInstCurr, HINSTANCE hPrevInstance, LPSTR lpszCmdParam, int nCmdShow)
17 {
18 ///declare
19 MSG msg;
20 BOOL bRet;
21 WNDCLASSEX WndClassEx;
22
23 ///Register WndProc
24 WndClassEx.cbSize = sizeof(WNDCLASSEX);
25 WndClassEx.style = CS_HREDRAW | CS_VREDRAW;
26 WndClassEx.lpfnWndProc = WndProc;
27 WndClassEx.cbClsExtra = 0;
28 WndClassEx.cbWndExtra = 0;
29 WndClassEx.hInstance = hInstCurr;//from WinMain
30 WndClassEx.hIcon = LoadIcon(NULL, IDI_APPLICATION);
31 WndClassEx.hCursor = LoadCursor(NULL, IDC_ARROW);
32 WndClassEx.hbrBackground =(HBRUSH)GetStockObject(WHITE_BRUSH); //(HBRUSH)(COLOR_3DSHADOW+1);
33 WndClassEx.lpszMenuName =NULL; // "MYMENU"; //xxx.rc need define the same name
34 WndClassEx.lpszClassName = szClassName; // = WndProc, Will run 1st CreatWindowEx
35 WndClassEx.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
36
37 ///register OK?
38 if(!RegisterClassEx(&WndClassEx))
39 {
40 MessageBox(0, "Could Not Register Window", "Oh Oh...", MB_ICONEXCLAMATION | MB_OK);
41 return -1;
42 }
43
44 ///Create Window
45 HWND hWndc;
46 hWndc = CreateWindow(
47 szClassName,// registered class name
48 TEXT("First Windows Program"),//message on title
49 WS_OVERLAPPEDWINDOW, //window type
50 CW_USEDEFAULT, // X loc.
51 CW_USEDEFAULT, // Y loc.
52 CW_USEDEFAULT, // width
53 CW_USEDEFAULT, // heigth
54 NULL, //parent window code,It is parent window when setting as NULL
55 NULL, //function window code,set NULL when using type function
56 hInstCurr, //just was registered and is current instance
57 NULL);
58
59 ///create OK?
60 if (!hWndc)
61 {
62 MessageBox(0, "Could Not Create Window", "Oh Oh...", MB_ICONEXCLAMATION | MB_OK);
63 return -1;
64 }
65
66 ///Show Window
67 ShowWindow(hWndc, nCmdShow);//nCmdShow from WinMain(HINSTANCE hInstCurr, HINSTANCE hPrevInstance, LPSTR lpszCmdParam, int nCmdShow)
68
69 ///Update Window
70 UpdateWindow(hWndc);// send WM_PAINT message to WinProc to plot window internal area
71
72 ///GetMessage to 0(WM_QUIT)
73 while ((bRet = GetMessage(&msg, NULL, 0, 0)) != 0)// =0 mean WM_QUIT
74 {
75 ///GetMsg OK?
76 if ( bRet == -1) { break; } // -1 mean abnormal, must abort the program
77
78 ///send message
79 TranslateMessage(&msg);// convert msg to chacter information
80 DispatchMessage(&msg);// send chacter information to WndProc
81
82 ///+
83 }//end while
84
85 ///program quit
86 return (int)msg.wParam;
87
88 ///main_end
89 }//end main
90
91 ///WndProc
92 LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wp, LPARAM lp)
93 {
94 ///declare struct
95 PAINTSTRUCT ps;
96 HDC hdc;// Handle of Device Context which is a data struct exist in GDI(Graphic Devices Interface)
97
98 ///switch msg
99 switch(msg)
100 {
101 ///WM PAINT (15)
102 case WM_PAINT://wondow message 15 is defined in winuser.h
103 {
104 ///BeginPaint
105 hdc = BeginPaint(hWnd, &ps);// pass hdc into GDI to run painting
106
107 ///Windows Display
108 //LPCTSTR lpszName = TEXT("Hello Windows world !");
109 LPCTSTR lpszName = "Hello Windows world !";
110 //char caName[] = "Hello Windows world !";
111 TextOut(hdc, 0, 0, lpszName, lstrlen(lpszName));
112 TextOut(hdc, 0, 20, lpszName, lstrlen(lpszName));
113 TextOut(hdc, 0, 40, lpszName, lstrlen(lpszName));
114
115 ///EndPaint
116 EndPaint(hWnd, &ps);
117
118 ///+
119 break;
120 }//end WM_PAINT
121
122 ///WM DESTROY
123 case WM_DESTROY:// =2
124 PostQuitMessage(0);
125 break;
126
127 ///default
128 default:
129 return (DefWindowProc(hWnd, msg, wp, lp));//leave to system
130
131 ///+
132 }//end Switch
133
134 ///+
135 return 0;// with msg procedure
136 }//end CALLBACK
137
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