今天看精华贴的时候看到一篇关于动态获取DSN的文章，里面用比较复杂的C脚本实现了动态获取DSN，代码如下：
#pragma code ("dmclient.dll")

#include "dmclient.h"

#pragma code()

char *DSNNAME = NULL;

CMN_ERROR Error;

char project[_MAX_PATH + 1];


if(!DMGetRuntimeProject(project, sizeof(project), &Error))

{

MessageBox(NULL,"提示","DMGetRuntimeProject执行失败",MB_OK);

}

else

{

DM_PROJECT_INFO ProjectInfomation;

if (!DMGetProjectInformation(project, &ProjectInfomation, &Error))

{

MessageBox(NULL,"提示","DMGetProjectInformation执行失败",MB_OK);

}

else

{

DSNNAME = SysMalloc(strlen(ProjectInfomation.szDSNName) + 1);

if(DSNNAME )

{

strcpy(DSNNAME, ProjectInfomation.szDSNName);

strcat(DSNNAME, "R");



}

else

{

MessageBox(NULL,"提示","SysMalloc执行失败",MB_OK);
}
}
}
return DSNNAME;

而我平时都直接从变量@DatasourceNameRT里直接读的，请问我这样跟用上面的脚本读出来的有什么不同么？