procedure CompactMdbDatabase(srcDbname,dstDbname,oldpwd,newpwd:string;bAccess97:boolean=true); 
var idbEngine:_dbEngine; 
begin 
if oldpwd <>'' then oldpwd := ';pwd='+oldpwd; 
if newpwd <>'' then newpwd := ';pwd='+newpwd; 

if bAccess97 then 
begin 
idbengine := CreateComObject(dao97.CLASS_DBEngine) as _DBEngine; 
idbEngine.CompactDatabase(srcDbname,dstDbname,newpwd,dbVersion30,oldpwd); 
end else 
begin 
idbengine := CreateComObject(dao2000.CLASS_DBEngine) as _DBEngine; 
idbEngine.CompactDatabase(srcDbname,dstDbname,newpwd,dbVersion40,oldpwd); 
end; 
end;