1、测试代码如下（代码来源于网络）：#include<windows.h>#in罕铞泱殳clude<稆糨孝汶;stdlib.h>#include<time.h>#define NUM 10#pragma(lib, "MSVCRTD.lib");LRESULT CALLBACK Winproc(HWND, UINT, WPARAM, LPARAM);int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstanc, LPSTR lpCmdLine, int nShowCmd){ MSG msg; static TCHAR szClassName[] = TEXT("::Bezier样条计算公式由法国雷诺汽车公司的工程师Pierm Bezier于六十年代提出"); HWND hwnd; WNDCLASS wc; wc.cbClsExtra = 0; wc.cbWndExtra = 0; wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); wc.hCursor = LoadCursor(NULL, IDC_ARROW); wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); wc.hInstance = hInstance; wc.lpfnWndProc = Winproc; wc.lpszClassName = szClassName; wc.lpszMenuName = NULL; wc.style = CS_HREDRAW | CS_VREDRAW; if (!RegisterClass(&wc)) { MessageBox(NULL, TEXT("注册失败"), TEXT("警告框"), MB_ICONERROR); return 0; } hwnd = CreateWindow(szClassName, szClassName, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL); ShowWindow(hwnd, SW_SHOWMAXIMIZED); UpdateWindow(hwnd); while (GetMessage(&msg, NULL, 0, 0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return msg.wParam;}LRESULT CALLBACK Winproc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam){ HDC hdc; static POINT pt[NUM]; TEXTMETRIC tm; static int cxClient, cyClient; HPEN hpen; int i, j, k, n, t; switch (message) { case WM_CREATE: static int cxchar; hdc = GetDC(hwnd); GetTextMetrics(hdc, &tm); cxchar = tm.tmAveCharWidth; ReleaseDC(hwnd, hdc); case WM_SIZE: cxClient = LOWORD(lparam); cyClient = HIWORD(lparam); return 0; case WM_PAINT: hdc = GetDC(hwnd); srand(time(0)); Rectangle(hdc, 0, 0, cxClient, cyClient); for (i = 0; i < 5; i++) { SelectObject(hdc, GetStockObject(WHITE_PEN)); PolyBezier(hdc, pt, NUM); for (j = 0; j < NUM; j++) { pt[j].x = rand() % cxClient; pt[j].y = rand() % cyClient; } hpen = CreatePen(PS_INSIDEFRAME, 3, RGB(rand() % 256, rand() % 256, rand() % 256)); DeleteObject(SelectObject(hdc, hpen)); PolyBezier(hdc, pt, NUM); for (k = 0; k < 50000000; k++); } for (i = 0; i < 100; i++) { Ellipse(hdc, rand() % cxClient, rand() % cyClient, rand() % cxClient, rand() % cyClient); Pie(hdc, j = rand() % cxClient, k = rand() % cyClient, n = rand() % cxClient, t = rand() % cyClient, rand() % cxClient, rand() % cyClient, rand() % cxClient, rand() % cyClient); } if ((n = (n + j) / 2) > cxchar * 20) n = cxchar * 20; SetTextColor(hdc, RGB(rand() % 256, rand() % 256, rand() % 256)); ReleaseDC(hwnd, hdc); DeleteObject(hpen); ValidateRect(hwnd, NULL); return 0; case WM_DESTROY: PostQuitMessage(0); return 0; } return DefWindowProc(hwnd, message, wparam, lparam);}
2、编译时出现如下错误：1>MSVCRTD.lib(crtexe.obj) : error LNK2019: 无法解析的外部符号 _main，该符号在函数 ___tmainCRTStartup 中被引用
3、右击项目，打开“属性”页
4、更改上图红色框内容为/subsystem:windows。如果是刚开始默认的是/subsystem:windows则改为/subsytem:console
5、再次编译即过通过测试，运行结果截图如下
