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World of Shareware - Software Farm 2
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wosw_2.zip
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wosw_2
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CPROG
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WINPROGS.ZIP
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CONNECT.ZIP
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CONNECT.C
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1990-11-28
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115 lines
/* Connect.C - Connect the Dots Program
Petzold
*/
#include <windows.h>
#define MAXPOINTS 1000
long FAR PASCAL WndProc (HWND, WORD, WORD, LONG);
int PASCAL WinMain (HANDLE hInstance,
HANDLE hPrevInstance,
LPSTR lpszCmdParam,
int nCmdShow)
{
static char szAppName[] = "Connect";
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
if (!hPrevInstance)
{
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 = GetStockObject (WHITE_BRUSH);
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szAppName;
RegisterClass(&wndclass);
}
hwnd = CreateWindow (szAppName,
"Connect-the-Dots Mouse Demo",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL,
NULL,
hInstance,
NULL);
ShowWindow (hwnd, nCmdShow);
UpdateWindow (hwnd);
while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg);
DispatchMessage (&msg);
}
return msg.wParam;
}
long FAR PASCAL WndProc (HWND hwnd,
WORD message,
WORD wParam,
LONG lParam)
{
static POINT points[MAXPOINTS];
static short nCount;
HDC hdc;
PAINTSTRUCT ps;
short i, j;
switch (message)
{
case WM_LBUTTONDOWN:
nCount = 0;
InvalidateRect (hwnd, NULL, TRUE);
return 0;
case WM_MOUSEMOVE:
if (wParam & MK_LBUTTON && nCount < MAXPOINTS)
{
points [nCount++] = MAKEPOINT (lParam);
hdc = GetDC (hwnd);
SetPixel (hdc, LOWORD (lParam), HIWORD (lParam), 0l);
ReleaseDC (hwnd, hdc);
}
return 0;
case WM_LBUTTONUP:
InvalidateRect (hwnd, NULL, FALSE);
return 0;
case WM_PAINT:
hdc = BeginPaint (hwnd, &ps);
for (i = 0; i < nCount - 1; i++)
for (j = i; j < nCount; j++)
{
MoveTo (hdc, points[i].x, points[i].y);
LineTo (hdc, points[j].x, points[j].y);
}
EndPaint (hwnd, &ps);
return 0;
case WM_DESTROY:
PostQuitMessage (0);
return 0;
}
return DefWindowProc (hwnd, message, wParam, lParam);
}