>Hi! I am new to visual basic and i am working on a case study but my knowledge is too little about this application. My question is, how can i transfer the cursor from the first textbox onto the second textbox by pressing the "Enter" key?

Normally, the Enter key is used to activate a command button marked as the default for a form. A good example is an about form with an OK button. The TAB is what most Windows apps use to navigate through the controls on a form. But, if you really want to implement this behavior, you can put some code on the KeyPress or KeyUp/KeyDown events of the textbox like so:

Private Sub txtControl_KeyPress(KeyAscii As Integer)
   If KeyAscii = 13 Then SendKeys "{TAB}"
End Sub

Keep in mind that you may get unwanted results if later you want to have a command button to act as the default.
HTH