To find the string all files in AOT, use below command
K:\AosService\PackagesLocalDirectory\DynaCrane>findstr
/i /l /n /s /c:"InternalTask" *.xml
customFilter = SysEPCustomFilter::construct(formStr(ReqTransPOListPage));
customFilter.load();
customFilter.setInitialFilterControlValue(formControlStr(ReqTransPOListPage, yourFilter), 0);
if (this.listPage().listPageArgs().parameters())
{
reqPOFilterEnum = customFilter.getFilterControlValue(formControlStr(ReqTransPOListPage, yourFilter));
SysQuery::findOrCreateRange(_query.dataSourceTable(tableNum(ReqPO)), fieldNum(ReqPO, ReqDateOrder)).value(SysQueryRangeUtil::xxxReqPOFilter(reqPOFilterEnum));
}