在前面练习得基础上更加进一步，在运行时点击按钮，设定过程分析器的趋势笔时间跨度和样本数量。

FUNCTION

hcursor;
pa=ObjectByName("AN5");
//显示游标
hcursors=_OBJECTGetproperty(pa,"Cursors");
_ObjectCallMethod(hcursors,"Create","cursor1",500);
hcursor=_OBJECTCallMethod(hcursors,"get_item",1);
_ObjectSetProperty(hcursor,"Visible",-1);
//趋势板1
hpanes=_OBJECTGetProperty(pa,"Panes");
hpane=_OBJECTCallMethod(hpanes,"get_item",1);
//获取板1下面趋势笔1
hpens=_OBJECTGetproperty(hpane,"Pens");
hpen=_OBJECTCallMethod(hPens,"get_item",1);
//采样频率1000ms
_ObjectSetProperty(hPen,

"SamplePeriod",

1000)
//样本900个
_ObjectSetProperty(pa,

"NumberofSamples",

900)
//设置时间跨度15分钟
_ObjectCallMethod(hPen,

"SetDefaultSpan",

"ResetToDefaultSpan");
//跳转到当前
_ObjectCallMethod(hPen,

保存编译运行，点击按钮就可以达到效果了。