用nmake编译链接程序报错error LNK2019: 无法解析的外部符号_WinMain@16，该符号在函数 ___tmainCRTStartup 中被引用

用nmake编译链接程序报错error LNK2019:

       link  /INCREMENTAL:NO /NOLOGO -subsystem:windows,5.0 -out:bin\demo3.exe bin\3.obj kernel32.lib  ws2_32.lib mswsock.lib advapi32.lib bufferoverflowu.lib
LIBCMTD.lib(wincrt0.obj) : error LNK2019: 无法解析的外部符号_WinMain@16，该符号在函数 ___tmainCRTStartup 中被引用bin\demo3.exe : fatal error LNK1120: 1 个无法解析的外部命令

NMAKE : fatal error U1077: “"d:\Program Files\Microsoft

Visual Studio 8\VC\BIN\
link.EXE"”: 返回代码“0x460”
Stop.

解决方式：在程序中添加
#pragma comment( linker, "/subsystem:console /entry:mainCRTStartup" )
可已根据需要添加不同组合
#pragma comment( linker, "/subsystem:windows/entry:WinMainCRTStartup" )
#pragma comment( linker, "/subsystem:windows/entry:mainCRTStartup" )

#pragma comment( linker, "/subsystem:console /entry:mainCRTStartup" )
#pragma comment( linker, "/subsystem:console /entry:WinMainCRTStartup" )

==================================================================================

Makefile

!include <Win32.Mak>
OUTDIR = bin
all:$(OUTDIR) $(OUTDIR)\demo3.exe
$(OUTDIR):
 if not exist "$(OUTDIR)/$(NULL)" mkdir $(OUTDIR)

$(OUTDIR)\3.obj:3.c
 $(CC) $(cflags) $(cvars) /Gz /Fo"$(OUTDIR)\\"

/Fd"$(OUTDIR)" 3.c

$(OUTDIR)\demo3.exe:$(OUTDIR)\3.obj
 $(link) $(guiflags) -out:$(OUTDIR)\demo3.exe

$(OUTDIR)\3.obj $(conlibs)

==================================================================================

源文件3.c

#include <windows.h>

#pragma comment( linker, "/subsystem:console /entry:mainCRTStartup" )//新增

int main(int argc, TCHAR argv[])
{
 HANDLE hFile;
 DWORD dwWritten;
 TCHAR szSystemDir[MAX_PATH];
 
 GetSystemDirectory(szSystemDir, MAX_PATH);
 hFile = CreateFile("systemroot.txt",
  GENERIC_WRITE,
  0,NULL,CREATE_ALWAYS,
  FILE_ATTRIBUTE_NORMAL,
  NULL);

 if (hFile != INVALID_HANDLE_VALUE)
 {
  if (!WriteFile(hFile, szSystemDir, lstrlen(szSystemDir), &dwWritten, NULL))
  {
   return GetLastError();
  }
 }

 CloseHandle(hFile);
 return 0;
}

==================================================================================