I tried setting the form Location (X, Y) properties, from the Mouse down and mouse up events.

But the location deosn't change.

Also when I cant chacge the location (X, Y) at design time. the values are reseted to the default values

Am I missing anything.

Thanks

What platform are you targeting: CE or Mobile?

Windows Mobile.

By default, all forms are full screen using the .NET Compact Framework under Windows Mobile. You need set certain properties so that your forms are not full screen. See this blog post for the details. 

Following the procedures outlined in the blog post eliminates the need to write your own mouse event handlers to reposition the form.