API 도형 그리기

#include <Windows.h>

#include <Math.h>

// LRESULT == 32bit 정수형

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam , LPARAM lParam)

{

HDC hdc; // handle device context

PAINTSTRUCT ps;

char str[256] = "Hello API";

int x,y,kd;

double r;

int h = 50;

switch(message)

{

case WM_PAINT:

hdc = BeginPaint(hWnd,&ps); // GetDC

OutputDebugString("WM_PAINT");

// rectangle

Rectangle(hdc,100,100,200,200);

// tri angle

MoveToEx(hdc,350,100,NULL);

LineTo(hdc,300,200);

LineTo(hdc,400,200);

LineTo(hdc,350,100);

// ellipse

Ellipse(hdc,500,100,600,200);

// star

MoveToEx(hdc,250,350,NULL);

LineTo(hdc,150,650);

LineTo(hdc,400,450);

LineTo(hdc,100,450);

LineTo(hdc,350,650);

LineTo(hdc,250,350);

//hexagon

MoveToEx(hdc,700,350,NULL);

LineTo(hdc,600,400);

LineTo(hdc,600,500);

LineTo(hdc,700,550);

LineTo(hdc,800,500);

LineTo(hdc,800,400);

LineTo(hdc,700,350);

// radian

for(int i = 0; i< 10; i++)

{

kd = 10 * i + 90;

r = kd *3.141592/180.0;

x = (int)(cos(r)*h);

y = (int)(sin(r)*h);

MoveToEx(hdc,100 + x, 700 + y,NULL);

LineTo(hdc, 100 - x, 700 - y);

}

EndPaint(hWnd,&ps); // ReleaseDC

break;

case WM_DESTROY:

OutputDebugString("WM_DESTROY");

PostQuitMessage(0);

break;

}

return DefWindowProc(hWnd,message,wParam,lParam);

}