Private Sub YourButton_Click()
On Error GoTo Err_YourButton_Click
Dim stDocName As String
Dim stLinkCriteria As String
stDocName = "NameOfYourForm"
DoCmd.OpenForm stDocName, , , stLinkCriteria
Exit_YourButton_Click:
Exit Sub
Err_YourButton_Click:
MsgBox Err.Description
Resume Exit_YourButton_Click
End Sub