VC++定义一只红色画笔，绘制一个等边五边形

#include<windows.h> #include<stdlib.h> #include<string.h> #include<math.h> #define Pi 3.1415926535 long WINAPI WndProc(HWND hWnd, UINT iMessage, UINT wParam, LONG lParam); BOOL InitWindowsClass(HINSTANCE hInstance); BOOL InitWindows(HINSTANCE hInstance,int nCmdShow); int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { MSG Message; if(!InitWindowsClass(hInstance)) return FALSE; if(!InitWindows(hInstance,nCmdShow)) return FALSE; while(GetMessage(&Message,0,0,0)) { TranslateMessage(&Message); DispatchMessage(&Message); } return Message.wParam; } long WINAPI WndProc(HWND hWnd,UINT iMessage,UINT wParam,LONG lParam) { HDC hDC; HBRUSH hBrush,hDefBrush; HPEN hPen,hDefPen; PAINTSTRUCT PtStr; double dfRadious0 = 100.0,dfRadious1; POINT lpOuterPoints[5],lpInnerPoints[5]; POINT lpTriangle[3]; dfRadious1 = dfRadious0*sin(0.1*Pi)/sin(126.0/180*Pi); for(int i=0;i<5;i++) { lpOuterPoints[i].x = (long)(dfRadious0*cos(i*72.0/180*Pi)); lpOuterPoints[i].y = (long)(dfRadious0*sin(i*72.0/180*Pi)); lpInnerPoints[i].x = (long)(dfRadious1*cos(i*72.0/180*Pi+36.0/180*Pi)); lpInnerPoints[i].y = (long)(dfRadious1*sin(i*72.0/180*Pi+36.0/180*Pi)); } switch(iMessage) { case WM_PAINT: hDC = BeginPaint(hWnd,&PtStr); SetMapMode(hDC,MM_ANISOTROPIC); SetWindowOrgEx(hDC,-100,-100,NULL); hPen = CreatePen(PS_SOLID,1,RGB(255,0,0)); hDefPen = (HPEN)SelectObject(hDC,hPen); Polygon(hDC,lpOuterPoints,5); SelectObject(hDC,hDefPen); DeleteObject(hPen); for(i=0;i<5;i++) { lpTriangle[0] = lpOuterPoints[i%5]; lpTriangle[1] = lpInnerPoints[i%5]; lpTriangle[2] = lpOuterPoints[(i+1)%5]; hBrush = CreateSolidBrush(RGB(i*10,i*50,i*30)); hDefBrush = (HBRUSH)SelectObject(hDC,hBrush); Polygon(hDC,lpTriangle,3); lpTriangle[2] = lpInnerPoints[(i+4)%5]; SelectObject(hDC,hDefBrush); DeleteObject(hBrush); hBrush = CreateSolidBrush(RGB((5-i)*40,(5-i)*50,(5-i)*20)); hDefBrush = (HBRUSH)SelectObject(hDC,hBrush); Polygon(hDC,lpTriangle,3); SelectObject(hDC,hDefBrush); DeleteObject(hBrush); } hBrush = CreateSolidBrush(RGB(255,255,255)); hDefBrush = (HBRUSH)SelectObject(hDC,hBrush); Polygon(hDC,lpInnerPoints,5); SelectObject(hDC,hDefBrush); DeleteObject(hBrush); MoveToEx(hDC,lpOuterPoints[0].x,lpOuterPoints[0].y,NULL); for(i=1;i<=5;i++) { hPen = CreatePen(PS_SOLID,1,RGB(0,i*20,0)); hDefPen = (HPEN)SelectObject(hDC,hPen); LineTo(hDC,lpOuterPoints[(i+2)%5].x,lpOuterPoints[(i+2)%5].y); SelectObject(hDC,hDefPen); DeleteObject(hPen); } EndPaint(hWnd,&PtStr); return 0; case WM_DESTROY: PostQuitMessage(0); return 0; default: return(DefWindowProc(hWnd,iMessage,wParam,lParam)); } } BOOL InitWindows(HINSTANCE hInstance,int nCmdShow) { HWND hWnd; hWnd = CreateWindow("WinFill", "五边形", WS_OVERLAPPEDWINDOW, 200, 200, 230, 230, NULL, NULL, hInstance, NULL); if(!hWnd) return FALSE; ShowWindow(hWnd,nCmdShow); UpdateWindow(hWnd); return TRUE; } BOOL InitWindowsClass(HINSTANCE hInstance) { WNDCLASS WndClass; WndClass.cbClsExtra = 0; WndClass.cbWndExtra = 0; WndClass.hbrBackground = (HBRUSH)(GetStockObject(WHITE_BRUSH)); WndClass.hCursor = LoadCursor(NULL,IDC_ARROW); WndClass.hIcon = LoadIcon(NULL,"END"); WndClass.hInstance = hInstance; WndClass.lpfnWndProc = WndProc; WndClass.lpszClassName = "WinFill"; WndClass.lpszMenuName = NULL; WndClass.style = CS_HREDRAW|CS_VREDRAW; return RegisterClass(&WndClass); }