Yes they will require Framework 4. The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it. My latest tip/trick

siaswar wrote: in vs 2008 I had no problem. You're using Sql Ce by the looks of it. There might be different versions[^] of the SqlCe driver on your system. siaswar wrote: what kind of database is better to use in simple program: local? or in localhost? Since SqlCe is serverless, I'm assuming that you're comparing SqlCe and SqlExpress. If you're just going to store some data that could have been in a text-file, go for SqlCe. If you need a real database, go for Express. I are Troll :suss:

siaswar wrote: when want to import results?! Your requirements are still not clear to me. But regardless your "studentbook" table still represents a link table (two tables linked together.) You fill it in when you have the necessary information to fill it in. Which, as best as I can figure, you would have when you assigned a student to a class. However if there is a 'check out book' process (a manual process perhaps done the first day of class) then it would be done then.

siaswar wrote: I mean the better compiler,some compiler donot support some code's. That doesn't make any sense. If you try to compile a MFC program with a Borland compiler, chances are that it will fail. But the opposite is true also: if you try to comile a program that use libraries from borland with a microsoft compiler, it won't work neither. That doesn't mean that Borland is better or worse than visual C++. Cédric Moonen Software developer Charting control [v1.1]