Hi,

I thank you, for your answers. I didn t found where is the wrong parameter, but i used an other data source, with text file .

I make a request, i write the results in a text file. And i use this file as data source. My code works .

I will search for access data base, moreover i had already watched fiew pages of "Programming MapPoint in .NET" Eric.

On this site :

Programming MapPoint in .NET - Google Recherche de Livres

There is few page of this book. So perhaps, if i sell one of my kidney one day. I will buy this book .

Thank you for your answers again.