Programming Windows程式开发设计指南->第七章 例子程序1
/*_############################################################################
_##
_## Programming Windows程式开发设计指南->第七章 例子程序1
_## Author: xwlee
_## Time: 2007.06.22
_## Chang'an University
_## Development condition: win2003 Server+VC6.0
_##
_## 程序7-1 CONNECT
_## CONNECT.C 文件
_## 简单的鼠标处理：一个例子
_## 程序只是进行验证
_##
_##
_## CONNECT.C -- Connect-the-Dots Mouse Demo Program
_## (c) Charles Petzold, 1998
_##
_##########################################################################*/
#include
#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 ;
int i, j ;
PAINTSTRUCT ps ;
switch (message)
{
case WM_LBUTTONDOWN:
iCount = 0 ;
InvalidateRect (hwnd, NULL, TRUE) ;
return 0 ;
case WM_MOUSEMOVE:
if (wParam & MK_LBUTTON && iCount < 1000)
{
pt[iCount ].x = LOWORD (lParam) ;
pt[iCount++].y = HIWORD (lParam) ;
hdc = GetDC (hwnd) ;
SetPixel (hdc, LOWORD (lParam), HIWORD (lParam), 0) ;
ReleaseDC (hwnd, hdc) ;
}
return 0 ;
case WM_LBUTTONUP:
InvalidateRect (hwnd, NULL, FALSE) ;
return 0 ;
case WM_PAINT:
hdc = BeginPaint (hwnd, &ps) ;
SetCursor (LoadCursor (NULL, IDC_WAIT)) ;
ShowCursor (TRUE) ;
for (i = 0 ; i < iCount - 1 ; i++)
for (j = i + 1 ; j < iCount ; j++)
{
MoveToEx (hdc, pt[i].x, pt[i].y, NULL) ;
LineTo (hdc, pt[j].x, pt[j].y) ;
}
ShowCursor (FALSE) ;
SetCursor (LoadCursor (NULL, IDC_ARROW)) ;
EndPaint (hwnd, &ps) ;
return 0 ;
case WM_DESTROY:
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}