主题：选择最近的日期

1、设置3个变量%a%、%b%、%c%；
2、在窗口设置一个标签"  "；
3、设置一个按钮；
4、设置按钮公式：
SortCol(GridName,"",1) And
SetVariable("%a%",FindText(GridName,"日期1","日期1"," <> ","",-1)) And

SortCol(GridName,"日期2",1) And
SetVariable("%b%",FindText(GridName,"日期2","日期2"," <> ","",-1)) And

SortCol(GridName,"日期3",1) And
SetVariable("%c%",FindText(GridName,"日期3","日期3"," <> ","",-1)) And

SetLabel("  ",Text(Max([%a%],[%b%],[%c%])))

最近的日期就可以在标签显示。