画线，绘制填入区域

RGB颜色查询对照表

http://www.114la.com/other/rgb.htm

/*------------------------------------------------------------------------
   DEVCAPS1.C -- Device Capabilities Display Program No. 1
	         (c) Charles Petzold, 1998
 ----------------------------------------------------------------------*/
#include <windows.h>
#include<cmath>
#define NUM 1000
#define TWOPI (2*3.14159)


LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
            PSTR szCmdLine, int iCmdShow)
{
	static TCHAR szAppName[] = TEXT ("Bezier") ;
	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 ("This program requires Windows NT!"),
             				szAppName, MB_ICONERROR) ;
		return 0 ;
     }

	hwnd = CreateWindow (	szAppName, TEXT ("Device Capabilities"),
                				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 ;
}

void DrawBezier(HDC hdc, POINT apt[]){
	PolyBezier(hdc, apt, 4);
	MoveToEx(hdc, apt[0].x, apt[0].y,NULL);
	LineTo(hdc, apt[1].x ,apt[1].y);

	MoveToEx(hdc, apt[2].x, apt[2].y, NULL);
	LineTo(hdc, apt[3].x, apt[3].y);
}
void Draw(HWND hwnd, HDC hdc){
	 RECT rect;
     GetClientRect(hwnd, &rect);
	 for(int x = 0; x< rect.right;x+=10){
	     MoveToEx(hdc, x, 0, NULL);
		 LineTo(hdc, x, rect.bottom);
	 }
	 for(int y = 0; y< rect.bottom; y+=10){
	     MoveToEx(hdc, 0, y, NULL);
		 LineTo(hdc, rect.right, y);
	 }
}
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	static int	cxClient, cyClient;
	HDC		hdc ;
	int		i ;
	PAINTSTRUCT	ps ;
	TEXTMETRIC	tm ;
	static POINT aptFigure [10] = {10,70, 50,70, 50,10, 90,10, 90,50,
				     30,50, 30,90, 70,90, 70,30, 10,30 };

	static POINT apt[10];	


	switch (message)
     {
	case WM_SIZE:
		cxClient = LOWORD(lParam);
		cyClient = HIWORD(lParam);
		apt[0].x = cxClient/4;
		apt[0].y = cyClient/2;

		apt[1].x = cxClient/2;
		apt[1].y = cyClient/4;

		apt[2].x =cxClient / 2;
		apt[2].y = 3 * cyClient/4;

		apt[3].x = 3 * cxClient/4;
		apt[3].y = cyClient/2;

		return 0;

	case WM_PAINT:
		InvalidateRect(hwnd, NULL, TRUE);
		hdc = BeginPaint(hwnd, &ps);
		
		Draw(hwnd, hdc);

		
		SelectObject(hdc, CreateHatchBrush(HS_FDIAGONAL,0x7A378B));
		for(i = 0; i<10; i++){
			apt[i].x = cxClient * aptFigure[i].x / 200;
			apt[i].y = cyClient * aptFigure[i].y / 100;
		}
		SetPolyFillMode(hdc, ALTERNATE);
		Polygon(hdc, apt, 10);

		SelectObject(hdc, CreateSolidBrush(0x7CFC00));
		for(i = 0; i< 10; i++)apt[i].x += cxClient / 2;
		SetPolyFillMode(hdc, WINDING);
		Polygon(hdc, apt, 10);
		EndPaint(hwnd, &ps);
		
		
		//Polyline(hdc, apt,5);
		
		
		/*RECT rect;
		GetClientRect(hwnd, &rect);

		for(int y =0; y < rect.bottom; y+=100){
		    MoveToEx(hdc, 0, y, NULL);
			LineTo(hdc, rect.right, y);
		}
		for(int x = 0;x<rect.right;x+=100){
		    MoveToEx(hdc, x,0,NULL);
			LineTo(hdc, x,rect.bottom);
		}
	
		
		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);
		//Ellipse(hdc, 100, 100, 500, 400);
		//RoundRect(hdc,100,100,500,400,75,75);*/
		
		return 0 ;

	case WM_DESTROY:
		PostQuitMessage (0) ;
		return 0 ;
	}
	return DefWindowProc (hwnd, message, wParam, lParam) ;
}