Hi Johannes,
If using Origin C, you can try the following example.
void test_expgraph_lt()
{
	GraphLayer gl = Project.ActiveLayer();  // get the active graph layer
	if(!gl)
		return;
	
	// construct the LabTalk command
	string strCmd = "expGraph type:=emf overwrite:=replace path:=G:\\";
	strCmd += " filename:=\"";
	strCmd += Project.GetName();  // project name
	strCmd += "--";
	strCmd += gl.GetPage().GetName();  // graph name
	strCmd += "\" tr.margin:=2 tr1.unit:=3 tr1.Width:=100 tr2.tif.dotsperinch:=300;";
	LT_execute(strCmd);  // execute the LabTalk script
}
Penn