Thnak you Herfried for your help.

to resolve my problem, i use the something like this in my code:

public class    myDllClass
{

public Cursor    GetCursor1()
{
...
aCursor = new Cursor(
Assembly.GetAssembly(this.GetType()).GetManifestResourceStream(
"EmbeddedRsrc.Photo1.Cur" ) );
...
return( aCursor);
}

}

where EmbeddedRsrc is the namespace defined in the dll and Photo1.Cur is the
name of the cursor file added in the dll project with the property eembedded
resource.

I wish you to all an happy new year

Pascal