打印编程

开发平台：

Visual C++

log_file.cpp：源码内容

							#include "precomp.h"
#include "log_file.h"
static TCHAR logFileName[ MAX_PATH + 1 ] =  _T("");
static unsigned int show_level = 0;
#ifndef __BORLANDC__
#pragma comment(lib,"version.lib")
#else
#define min(a,b)            (((a) < (b)) ? (a) : (b))
#endif
int  create_log(LPCTSTR ID, unsigned int level )
{
	HANDLE hFile = NULL;
	DWORD writedBytes =  (level>3)?3:level;
	GetSystemDirectory(logFileName, sizeof(logFileName)/sizeof(TCHAR)-1);
	_stprintf_s(logFileName + 3, sizeof(logFileName)/sizeof(TCHAR)-4,  _T("%s.log"), ID );
	hFile = CreateFile(logFileName,GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
	if( INVALID_HANDLE_VALUE == hFile )
		hFile = CreateFile(logFileName,GENERIC_WRITE,FILE_SHARE_READ,NULL,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL);
	else
	{
		CloseHandle(hFile);
		hFile = INVALID_HANDLE_VALUE;
	}
	if( INVALID_HANDLE_VALUE != hFile )
	{
		_stprintf_s(logFileName, sizeof(logFileName)/sizeof(TCHAR)-1,  _T("%drn"),writedBytes);		
		WriteFile(hFile, logFileName, (DWORD)_tcslen(logFileName),&writedBytes,NULL);
		CloseHandle(hFile);
	}
	// 钺眢

						