一、配置命令环境

参考此教程配置：https://www.cnblogs.com/chenshuangjian/p/16450346.html

二、代码编写

工程目录结构：

代码编写：

// (C) Copyright 2002-2007 by Autodesk, Inc. 
//
// Permission to use, copy, modify, and distribute this software in
// object code form for any purpose and without fee is hereby granted, 
// provided that the above copyright notice appears in all copies and 
// that both that copyright notice and the limited warranty and
// restricted rights notice below appear in all supporting 
// documentation.
//
// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS. 
// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE.  AUTODESK, INC. 
// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
// UNINTERRUPTED OR ERROR FREE.
//
// Use, duplication, or disclosure by the U.S. Government is subject to 
// restrictions set forth in FAR 52.227-19 (Commercial Computer
// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
// (Rights in Technical Data and Computer Software), as applicable.
//

//-----------------------------------------------------------------------------
//----- acrxEntryPoint.cpp
//-----------------------------------------------------------------------------
#include "StdAfx.h"
#include "resource.h"

//-----------------------------------------------------------------------------
#define szRDS _RXST("Arx")

//-----------------------------------------------------------------------------
//----- ObjectARX EntryPoint
class CDemo_DrawLineApp : public AcRxArxApp {

public:
	CDemo_DrawLineApp () : AcRxArxApp () {}

	virtual AcRx::AppRetCode On_kInitAppMsg (void *pkt) {
		// TODO: Load dependencies here

		// You *must* call On_kInitAppMsg here
		AcRx::AppRetCode retCode =AcRxArxApp::On_kInitAppMsg (pkt) ;
		
		// TODO: Add your initialization code here

		return (retCode) ;
	}

	virtual AcRx::AppRetCode On_kUnloadAppMsg (void *pkt) {
		// TODO: Add your code here

		// You *must* call On_kUnloadAppMsg here
		AcRx::AppRetCode retCode =AcRxArxApp::On_kUnloadAppMsg (pkt) ;

		// TODO: Unload dependencies here

		return (retCode) ;
	}

	virtual void RegisterServerComponents () {
	}


	// - ArxDemo_DrawLine._MyCommand1 command (do not rename)
	static void ArxDemo_DrawLine_MyCommand1(void)
	{
		// Add your code for command ArxDemo_DrawLine._MyCommand1 here
		AcGePoint3d P1(0,0,0);
		AcGePoint3d P2(10,10,10);
		//定义直线
		AcDbLine *pLine = new AcDbLine(P1,P2); 
		AcDbBlockTable *pBlockTable =NULL;
		//获取块表
		acdbHostApplicationServices()->workingDatabase()->getBlockTable(pBlockTable,AcDb::kForRead);
		AcDbBlockTableRecord *pBockTableRecord = NULL;
		//获取模型空间块表记录
		pBlockTable->getAt(ACDB_MODEL_SPACE,pBockTableRecord,AcDb::kForWrite);
		AcDbObjectId lineId;
		//将直线添加到块表记录
		pBockTableRecord->appendAcDbEntity(lineId,pLine);
		//关闭释放资源
		pBlockTable->close();
		pBockTableRecord->close();
		pLine->close();
	}
} ;

//-----------------------------------------------------------------------------
IMPLEMENT_ARX_ENTRYPOINT(CDemo_DrawLineApp)

ACED_ARXCOMMAND_ENTRY_AUTO(CDemo_DrawLineApp, ArxDemo_DrawLine, _MyCommand1, MyCommand1, ACRX_CMD_TRANSPARENT, NULL)

三、编译测试