Form Data Source Field

public void lookup(FormControl _formControl, str _filterStr)
{
Query query = new Query(); 
QueryBuildDataSource queryBuildDataSource; 
SysTableLookup sysTableLookup = SysTableLookup::newParameters(tableNum(custTable), _formControl); 

sysTableLookup.addLookupField(fieldNum(CustTable, AccountNum)); 
sysTableLookup.addLookupField(fieldNum(CustTable, CustGroup)); 

queryBuildDataSource = query.addDataSource(tableNum(CustTable)); 
queryBuildDataSource.addRange(fieldNum(CustTable, CustGroup)).value('40'); 

sysTableLookup.parmQuery(query); 
sysTableLookup.performFormLookup();
}

public void lookup()
{
Query query = new Query(); 
QueryBuildDataSource queryBuildDataSource; 
SysTableLookup sysTableLookup = SysTableLookup::newParameters(tableNum(custTable), this); 

sysTableLookup.addLookupField(fieldNum(CustTable, AccountNum)); 
sysTableLookup.addLookupField(fieldNum(CustTable, CustGroup)); 

queryBuildDataSource = query.addDataSource(tableNum(CustTable)); 
queryBuildDataSource.addRange(fieldNum(CustTable, CustGroup)).value('40'); 

sysTableLookup.parmQuery(query); 
sysTableLookup.performFormLookup();
}

public common lookupReference()
{
Query query = new Query(); 
QueryBuildDataSource queryBuildDataSource; 
SysTableLookup sysTableLookup = SysTableLookup::newParameters(tableNum(custTable), this); 

sysTableLookup.addLookupField(fieldNum(CustTable, AccountNum)); 
sysTableLookup.addLookupField(fieldNum(CustTable, CustGroup)); 

queryBuildDataSource = query.addDataSource(tableNum(CustTable)); 
queryBuildDataSource.addRange(fieldNum(CustTable, CustGroup)).value('40'); 

sysTableLookup.parmQuery(query); 

return sysTableLookup.performFormLookup();
}