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图形基础(七十五)

2010-12-30 21:10:52 · 作者: · 浏览: 40654
标签: 图形 基础
显示随机矩形的程式。这个RANDRECT如程式5-7中所示。

 程式5-7 RANDRECT
RANDRECT.C
/*----------------------------------------------------------------------
RANDRECT.C -- Displays Random Rectangles
(c) Charles Petzold, 1998
-----------------------------------------------------------------------*/

#include <windows.h>
#include <stdlib.h> // for the rand function

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
void DrawRectangle (HWND) ;

int cxClient, cyClient ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("RandRect") ;
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 (&wndcl