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| #define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <windowsx.h>
#include <mmsystem.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define WINDOW_CLASS_NAME "WINCLASS1"
#define WINDOW_WIDTH 400
#define WINDOW_HEIGHT 300
#define KEYDOWN(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000) ? 1 : 0)
#define KEYUP(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000) ? 0 : 1)
HWND main_window_handle = NULL;
HINSTANCE hinstance_app = NULL;
char buffer[80];
LRESULT CALLBACK WindowProc(HWND hwnd,
UINT msg,
WPARAM wparam,
LPARAM lparam)
{
PAINTSTRUCT ps;
HDC hdc;
switch(msg)
{
case WM_CREATE:
{
return(0);
} break;
case WM_PAINT:
{
hdc = BeginPaint(hwnd,&ps);
EndPaint(hwnd,&ps);
return(0);
} break;
case WM_DESTROY:
{
PostQuitMessage(0);
return(0);
} break;
default:break;
}
return (DefWindowProc(hwnd, msg, wparam, lparam));
}
int WINAPI WinMain( HINSTANCE hinstance,
HINSTANCE hprevinstance,
LPSTR lpcmdline,
int ncmdshow)
{
WNDCLASSEX winclass;
HWND hwnd;
MSG msg;
HDC hdc;
// first fill in the window class stucture
winclass.cbSize = sizeof(WNDCLASSEX);
winclass.style = CS_DBLCLKS | CS_OWNDC |
CS_HREDRAW | CS_VREDRAW;
winclass.lpfnWndProc = WindowProc;
winclass.cbClsExtra = 0;
winclass.cbWndExtra = 0;
winclass.hInstance = hinstance;
winclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
winclass.hCursor = LoadCursor(NULL, IDC_ARROW);
winclass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
winclass.lpszMenuName = NULL;
winclass.lpszClassName = WINDOW_CLASS_NAME;
winclass.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
hinstance_app = hinstance;
if (!RegisterClassEx(&winclass))
return(0);
if (!(hwnd = CreateWindowEx(NULL,
WINDOW_CLASS_NAME,
"Rectangle Drawing Demo",
WS_OVERLAPPEDWINDOW | WS_VISIBLE,
0,0,
WINDOW_WIDTH,
WINDOW_HEIGHT,
NULL,
NULL,
hinstance,
NULL)))
return(0);
main_window_handle = hwnd;
while(TRUE)
{
if (PeekMessage(&msg,NULL,0,0,PM_REMOVE))
{
if (msg.message == WM_QUIT)
break;
TranslateMessage(&msg);
DispatchMessage(&msg);
}
hdc = GetDC(hwnd);
RECT rect; // used to hold rect info
rect.left = rand()%WINDOW_WIDTH;
rect.top = rand()%WINDOW_HEIGHT;
rect.right = rand()%WINDOW_WIDTH;
rect.bottom = rand()%WINDOW_HEIGHT;
HBRUSH hbrush = CreateSolidBrush(RGB(rand()%256,rand()%256,rand()%256));
if ((rand()%2)==1)
FillRect(hdc,&rect,hbrush);
else
FrameRect(hdc,&rect,hbrush);
DeleteObject(hbrush);
ReleaseDC(hwnd,hdc);
if (KEYDOWN(VK_ESCAPE))
SendMessage(hwnd, WM_CLOSE, 0,0);
}
return(msg.wParam);
} |
