这个哪出错了呢?

[矫情狗_____]

#include <windows.h>
#include <tchar.h>

LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
	WNDCLASS wndclass;
	wndclass.lpfnWndProc = WindowProc;
	wndclass.cbClsExtra = 0;
	wndclass.cbWndExtra = 0;
	wndclass.style = CS_HREDRAW | CS_VREDRAW;
	wndclass.lpszClassName = _T("我的窗体");
	wndclass.hInstance = hInstance;
	wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
	wndclass.hIcon = 0;
	wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
	wndclass.lpszMenuName = 0;
	
	if(RegisterClass(&wndclass) == 0)
	{
		MessageBox(0, _T("错误"), _T("错误"), MB_OK);
		return 0;
	}
	HWND hWnd = CreateWindow(_T("我的窗体"), _T("第一个窗体"), WS_OVERLAPPEDWINDOW, 0, 0, 200, 300, 0, 0, hInstance, 0);
	if(hWnd == NULL)
	{
		MessageBox(0, _T("失败"), _T("失败"), MB_OK);
		return 0;
	}
	ShowWindow(hWnd, SW_SHOW);
	UpdateWindow(hWnd);
	MSG msg;
	while(GetMessage(&msg, NULL, 0, 0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return 0;
}
LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	switch(uMsg)
	{
	case WM_CLOSE:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hwnd, uMsg, wParam, lParam);
	}
	return 0;
}

--------------------Configuration: API_01 - Win32 Debug--------------------
Linking...
LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
Debug/API_01.exe : fatal error LNK1120: 1 unresolved externals
执行 link.exe 时出错.

API_01.exe - 1 error(s), 0 warning(s)

[不住隔壁的老王]

那里也没有错 估计是你VC配置问题吧
--------------------Configuration: win32_01 - Win32 Debug--------------------
Compiling...
main.cpp
Linking...

win32_01.exe - 0 error(s), 0 warning(s)

[Eleven]

LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main


工程的类型你建的时候选错了，你选择的是Win32 console application，而不是Win32 Application。
Link下得/subsystem: console -> /subsystem: windows