1. Graphics Laboratory Korea University
Windows Programming
Graphics Laboratory
Korea University

2. Microsoft Visual C++ 6.0

3. File  New

4. New Project

5. Win32 Application (1/2)

6. Win32 Application (2/2)

7. Workspace

8. New File

9. Workspace  FileView

10. “main.cpp”

11. #include <windows.h>
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
// global variables
char *szClassName = "Draw2DClass";
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE, LPSTR, int) {
// Registers the window class
WNDCLASSEX wcex;
wcex.cbSize = sizeof(wcex);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = (WNDPROC)WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(NULL,IDI_APPLICATION);
wcex.hIconSm = NULL;
wcex.hCursor = LoadCursor(NULL,IDC_ARROW);
wcex.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = szClassName;
RegisterClassEx(&wcex);
// Create the main window
HWND hWnd = CreateWindow(szClassName, "Draw in 2D", WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, 800, 600,
NULL, NULL, hInstance, NULL);
if (!hWnd) return FALSE;
ShowWindow(hWnd, SW_SHOWDEFAULT);
UpdateWindow(hWnd);
// Main message loop
MSG msg;
while (GetMessage(&msg, NULL, 0, 0))
TranslateMessage(&msg);
DispatchMessage(&msg); }
UnregisterClass(szClassName, wcex.hInstance);
return msg.wParam;

12. Window Message Handling/*
* WndProc: to process messages for the main window */
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
HDC hdc;
PAINTSTRUCT ps;
switch (message)
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
// TODO: Add any drawing code here...
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
default:
return DefWindowProc(hWnd, message, wParam, lParam); }
return 0;

13. Build

14. Execute

15. Draw Points /* * WndProc: to process messages for the main window */
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
HDC hdc;
PAINTSTRUCT ps;
register int i, j;
switch (message)
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
// TODO: Add any drawing code here...
for(i=-5; i<=5; i++)
for(j=-5; j<=5; j++)
SetPixel(hdc, 400+i, 300+j, RGB(255, 0, 0));
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
default:
return DefWindowProc(hWnd, message, wParam, lParam); }
return 0;

16. Result – Draw Points

17. Mouse Event Handing (1/2)
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
HDC hdc;
PAINTSTRUCT ps;
register int i, j;
switch (message)
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
// TODO: Add any drawing code here...
for(i=-5; i<=5; i++)
for(j=-5; j<=5; j++)
SetPixel(hdc, 400+i, 300+j, RGB(255, 0, 0));
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
case WM_LBUTTONDOWN:
case WM_LBUTTONUP:
case WM_MOUSEMOVE:
default:
return DefWindowProc(hWnd, message, wParam, lParam); }
return 0;

18. Mouse Event Handing (1/2)
int point[2] = { -5, -5 };
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
HDC hdc;
PAINTSTRUCT ps;
register int i, j;
switch (message)
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
// TODO: Add any drawing code here...
for(i=-5; i<=5; i++)
for(j=-5; j<=5; j++)
SetPixel(hdc, point[0]+i, point[1]+j, RGB(255, 0, 0));
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
case WM_LBUTTONDOWN:
point[0] = LOWORD(lParam);
point[1] = HIWORD(lParam);
InvalidateRect(hWnd, NULL, FALSE);
default:
return DefWindowProc(hWnd, message, wParam, lParam); }
return 0;

19. Result – Mouse Event Handling

20. Insert  Resource

21. Resources

22. Menu (1/6)

23. Menu (2/6)

24. Menu (3/6)

25. Menu (4/6)

26. Menu (5/6)

27. Menu (6/6)

28. Save Resources

29. Include Resources (1/3)

30. Include Resources (2/3)

31. Include Resources (3/3)

32. Result – Menu

33. Menu Event Handling

34. Result – Menu Event Handling

35. Miscellanies Check / Uncheck a item of menu
CheckMenuItem(GetMenu(hWnd), ID_PRIM_LINE, MF_CHECKED);
CheckMenuItem(GetMenu(hWnd), ID_PRIM_LINE, MF_UNCHECKED);
Enable / Disable a item of menu
EnableMenuItem(GetMenu(hWnd), ID_PRIM_LINE, MF_ENABLED);
EnableMenuItem(GetMenu(hWnd), ID_PRIM_LINE, MF_GRAYED);
COLORREF GetPixel( int x, int y ) const;
COLORREF SetPixel( int x, int y, COLORREF crColor );

36. RGB Color Model R G B Color Colors are additive 0.0 0.0 0.0 Black 1.0
Red
0.0
1.0
0.0
Green
0.0
0.0
1.0
Blue
1.0
1.0
0.0
Yellow
1.0
0.0
1.0
Magenta
0.0
1.0
1.0
Cyan
1.0
1.0
1.0
White

37. Insert  Resource

38. Dialog Box (1/5)

39. Dialog Box (2/5)

40. Dialog Box (3/5)

41. Dialog Box (4/5)

42. Dialog Box (5/5)

43. New Menu

44. Dialog Callback Function (1/2)

45. Dialog Callback Function (2/2)

46. Dialog Creation

47. Result – Dialog Box

48. Debug