/*
	CONSOLE SET WINDOW ALPHA TRANSPARENT TOOL, COPYRIGHT@2017~2019 BY LEO, VERSION 1.0
	SETA.EXE
	LINK KERNEL32 USER32

	UNICODE COMPILATION:
	==> G++ setA.c -lkernel32 -luser32 -D _UNICODE -D UNICODE -municode -O2 -static
	==> CL  setA.c /O2 /Oy- /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_UNICODE" /D "UNICODE" /MD

	ANSI COMPILATION:
	==> G++ setA.c -lkernel32 -luser32 -O2 -static
	==> CL  setA.c /O2 /Oy- /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /MD
*/

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

#ifndef _UNICODE
#define TCHARFORMAT CHAR
#else
#define TCHARFORMAT WCHAR
#endif

#if defined _MSC_VER
#pragma comment(lib, "kernel32.lib")
#pragma comment(lib, "user32.lib")
#else
//API函数声明
BOOL WINAPI SetLayeredWindowAttributes(HWND,COLORREF,BYTE,DWORD);
HWND WINAPI GetConsoleWindow(void);
#endif

//定义帮助说明
#define HELP_INFORMATION "\
setA v1.0 - Set window alpha transparent Tool - Copyright (C) 2017-2019 by Leo\n\
Usage: setA -t[title] -a[alpha] -r[R,G,B]\n\
\n\
General options:\n\
  -t  Specifies the window title to be operated\n\
  -a  Set the alpha transparency value\n\
  -r  Set the RGB value\n\
  -h  SHow help information\n\
Official website:\n\
      http://www.bathome.net/thread-44189-1-1.html\n"

//开关解析
int OPTIND=1, OPTOPT;
TCHAR* OPTARG;
int _tgetopt(int nargc, TCHAR* nargv[], TCHAR* ostr)
{
	static TCHAR* place=(TCHAR*)_T("");
	static TCHAR* lastostr=NULL;
	register TCHAR* oli;

	if(ostr!=lastostr)
	{
		lastostr=ostr;
		place=(TCHAR*)_T("");
	}

	if(!*place)
	{
		if(
		    (OPTIND>=nargc)                          ||
		    (*(place=nargv[OPTIND])!=(TCHAR)_T('-')) ||
		    (!*(++place))
		)
		{
			place=(TCHAR*)_T("");
			return _TEOF;
		}
		if (*place == (TCHAR)_T('-') && *(place+1) == (TCHAR)_T('\0'))
		{
			++OPTIND;
			return _TEOF;
		}
	}

	if (
	    (OPTOPT=*place++)==(TCHAR)_T(':') ||
	    !(oli=(TCHAR*)_tcschr((TCHARFORMAT*)ostr, (TCHAR)OPTOPT))
	)
	{
		if(!*place)
		{
			++OPTIND;
		}
	}

	if (oli != NULL && *(++oli) != (TCHAR)_T(':'))
	{
		OPTARG=NULL;
		if(!*place)
		{
			++OPTIND;
		}
	}
	else
	{
		if(*place)
		{
			OPTARG=place;
		}
		else if(nargc<=++OPTIND)
		{
			place=(TCHAR*)_T("");
		}
		else
		{
			OPTARG=nargv[OPTIND];
		}
		place=(TCHAR*)_T("");
		++OPTIND;
	}
	return OPTOPT;
}

//主函数入口
int _tmain(int argc, TCHAR** argv)
{
	//设置传入参数
	TCHAR* opeTITLE=NULL;
	HWND hWND=NULL;
	DWORD opeFLAG=(DWORD)0;
	INT K=-1, opeRGB=0, opeALPHA=127;

	if(argc<2)
	{
		//无参数则退出
		fprintf(stdout, HELP_INFORMATION);
		exit(0);
	}

	//开关解析
	while((K=_tgetopt(argc, argv, (TCHAR*)_T("t:a:r:hT:A:R:H")))!=_TEOF)
	{
		switch(K)
		{
		case 't':
		case 'T':
			if(OPTARG !=NULL)
			{
				opeTITLE=OPTARG;
			}
			break;

		case 'a':
		case 'A':
			opeFLAG |= 2;
			if(OPTARG !=NULL)
			{
				opeALPHA =_ttoi((TCHARFORMAT*)OPTARG);
				if(
				    (opeALPHA == 0 && *OPTARG != _T('0')) ||
				    (opeALPHA <0 || 255< opeALPHA)
				)
				{
					_ftprintf(stderr, _T("Alpha value must be in range of 0 to 255\n"));
					exit(1);
				}
			}
			break;

		case 'r':
		case 'R':
			opeFLAG |= 1;
			if(OPTARG !=NULL)
			{
				int tR=0, tG=0, tB=0;
				TCHAR* tSTR=NULL;

				tSTR=_tcstok((TCHARFORMAT*)OPTARG, _T(","));
				if(tSTR !=NULL)
				{
					tR=_ttoi((TCHARFORMAT*)tSTR);
					if(
					    (tR == 0 && *tSTR != _T('0')) ||
					    (tR <0 || 255< tR)
					)
					{
						_ftprintf(stderr, _T("RGB's R-color channel value must be in range of 0 to 255\n"));
						exit(1);
					}
				}
				else
				{
					break;
				}

				tSTR=_tcstok(NULL, _T(","));
				if(tSTR !=NULL)
				{
					tG=_ttoi((TCHARFORMAT*)tSTR);
					if(tG <0 || 255< tG)
					{
						_ftprintf(stderr, _T("RGB's G-color channel value must be in range of 0 to 255\n"));
						exit(1);
					}
				}
				else
				{
					break;
				}

				tSTR=_tcstok(NULL, _T(","));
				if(tSTR !=NULL)
				{
					tB=_ttoi((TCHARFORMAT*)tSTR);
					if(tB <0 || 255< tB)
					{
						_ftprintf(stderr, _T("RGB's B-color channel value must be in range of 0 to 255\n"));
						exit(1);
					}
				}
				else
				{
					break;
				}
				//合成RGB数值
				opeRGB=RGB(tR, tG, tB);

			}
			break;

		case 'h':
		case 'H':
			fprintf(stdout, HELP_INFORMATION);
			exit(0);

		default:
			_ftprintf(stderr, _T("Unknown switch '-%c'\n"), K);
			exit(1);
		}
	}

	//获取标题对应窗口句柄，无标题则获取当前控制台窗口句柄
	hWND=(opeTITLE==NULL)?GetConsoleWindow() :FindWindow(NULL, (TCHARFORMAT*)opeTITLE);

	if(hWND != NULL)
	{
		//获取窗口原风格
		long preSYTLE = GetWindowLong(hWND, GWL_EXSTYLE);

		//改指定窗口属性
		SetWindowLong(hWND, GWL_EXSTYLE,  preSYTLE|WS_EX_LAYERED);

		//设置窗口透明度
		if(! SetLayeredWindowAttributes(hWND, opeRGB, opeALPHA, opeFLAG))
		{
			_ftprintf(stderr, _T("Setting window's alpha transparency failed\n"));
			exit(1);
		}
	}
	else
	{
		_ftprintf(stderr, _T("Can not find the window for the specified title\n"));
		exit(1);
	}
	return 0;
}
复制代码

@echo off
for /l %%i in (255,-16,0) do (
	setA -a%%i
)
for /l %%i in (0,32,255) do (
	setA -a%%i
)
pause
复制代码