还要在控件属性“TrendIndex”中添加以下C动作：
#include "apdefap.h"
long _main(char* lpszPictureName, char* lpszObjectName, char* lpszPropertyName)
{
#pragma option(mbcs)
static long int Index_Trend = 0;
SetIndex(lpszPictureName, "Tr_Ctrl", Index_Trend);//设置索引
if (Index_Trend == 0){
Index_Trend++;//索引递增
return Index_Trend;
}
if (Index_Trend == 1){
Index_Trend = 0;//索引递增
return Index_Trend;
}
}