#include<windows.h>
LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd )
{
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,nShowCmd);
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);
RoundRect(hdc,cxClient/4, cyClient/4, 3*cxClient/4, 3*cyClient/4, cxClient/4, cyClient/4);
EndPaint(hwnd,&ps);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd,message,wParam,lParam);
}
