/*_############################################################################
_##
_## Programming Windows程式開發設計指南->第五章 例子程式2
_## Author: xwlee
_## Time: 2007.06.18
_## Chang'an University
_## Development condition: win2003 Server+VC6.0
_##
_## 程式5-2 LINEDEMO
_## LINEDEMO.C 檔案
_## 畫一個矩形、一個橢圓、一個圓角矩形和兩條線段,不過不是按這一順序。
_## 程式表明了定義封閉地區的函數實際上對這些地區進行了填入,因為在橢圓後面的線被遮住了
_##
_##
_## LINEDEMO.C -- Line-Drawing Demonstration Program
_## (c) Charles Petzold, 1998
_##
_##########################################################################*/
#include <windows.h>
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("LineDemo") ;
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 ("Line Demonstration"),
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 int cxClient, cyClient ;
HDC hdc ;
PAINTSTRUCT ps ;
switch (message)
{
case WM_SIZE:
cxClient = LOWORD (lParam) ;
cyClient = HIWORD (lParam) ;
return 0 ;
case WM_PAINT:
hdc = BeginPaint (hwnd, &ps) ;
Rectangle (hdc, cxClient / 8, cyClient / 8,
7 * cxClient / 8, 7 * cyClient / 8) ;
MoveToEx (hdc, 0, 0, NULL) ;
LineTo (hdc, cxClient, cyClient) ;
MoveToEx (hdc, 0, cyClient, NULL) ;
LineTo (hdc, cxClient, 0) ;
Ellipse (hdc, cxClient / 8, cyClient / 8,
7 * cxClient / 8, 7 * cyClient / 8) ; // 橢圓
RoundRect (hdc, cxClient / 4, cyClient / 4,
3 * cxClient / 4, 3 * cyClient / 4,
cxClient / 6, cyClient / 6) ;
EndPaint (hwnd, &ps) ;
return 0 ;
case WM_DESTROY:
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}