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分享#include <windows.h>
#define MAXPOINTS 1000
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("Connect") ;
HWND hwnd ;
MSG msg ;
WNDCLASS wndclass ;
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.lpszMenuName = NULL ;
wndclass.lpszClassName = szAppName ;
if (!RegisterClass (&wndclass)) {
MessageBox (NULL, TEXT ("Program requires Windows NT!"),
szAppName, MB_ICONERROR) ;
return 0 ;
}
hwnd = CreateWindow (szAppName, TEXT ("Connect-the-Points Mouse Demo"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL) ;
ShowWindow (hwnd, iCmdShow) ;
UpdateWindow (hwnd) ;
while (GetMessage (&msg, NULL, 0, 0)) {
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
return msg.wParam ;
}
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam,LPARAM lParam)
{
static POINT pt[MAXPOINTS] ;
static int iCount ;
HDC hdc ;
PAINTSTRUCT ps ;
switch (message)
{
case WM_MOUSEMOVE:
if (wParam & MK_LBUTTON && iCount < MAXPOINTS) {
pt[iCount].x = LOWORD (lParam) ;
pt[iCount].y = HIWORD (lParam) ;
iCount++;
}
InvalidateRect (hwnd, NULL, FALSE);
break;
case WM_PAINT:
hdc = BeginPaint (hwnd, &ps) ;
Polyline (hdc, pt, iCount) ;
EndPaint (hwnd, &ps) ;
break;
case WM_DESTROY:
PostQuitMessage (0) ;
break;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}
#include <windows.h>
#define MAXPOINTS 1000
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("Connect") ;
HWND hwnd ;
MSG msg ;
WNDCLASS wndclass ;
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.lpszMenuName = NULL ;
wndclass.lpszClassName = szAppName ;
if (!RegisterClass (&wndclass))
{
MessageBox (NULL, TEXT ("Program requires Windows NT!"),
szAppName, MB_ICONERROR) ;
return 0 ;
}
hwnd = CreateWindow (szAppName, TEXT ("Connect-the-Points Mouse Demo"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL) ;
ShowWindow (hwnd, iCmdShow) ;
UpdateWindow (hwnd) ;
while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
return msg.wParam ;
}
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam,LPARAM lParam)
{
static POINT pt[MAXPOINTS] ;
static int iCount ;
HDC hdc ;
PAINTSTRUCT ps ;
switch (message)
{
case WM_MOUSEMOVE:
if (wParam & MK_LBUTTON && iCount < 1000)
{
pt[iCount].x = LOWORD (lParam) ;
pt[iCount].y = HIWORD (lParam) ;
iCount++;
hdc = GetDC (hwnd) ;
SetPixel (hdc, LOWORD (lParam), HIWORD (lParam), 0) ;
//
}
if(iCount >= 1000)
{
InvalidateRect (hwnd, NULL, TRUE) ;
ReleaseDC (hwnd, hdc) ;
}
break;
case WM_PAINT:
hdc = BeginPaint (hwnd, &ps) ;
Polyline (hdc, pt, MAXPOINTS) ;
EndPaint (hwnd, &ps) ;
break;
case WM_DESTROY:
PostQuitMessage (0) ;
break;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}