how to make text apear in GUI

[maharajakecil]

hello all vb expert. i had develop a GUI using vb 6.0. did anybody know how to make text "your exceed limit. please reenter your value' when user enter the our of range value for X and Y. this is my source code for that GUI. i'm really appreciate! i'm trying to finish my final year project. i want to modified it!

Private Sub Form_Load()
Dim Xvalue As Long
Dim Yvalue As Long
 
For Xvalue = 0 To 15
    cboXvalue.AddItem CStr(Xvalue)
Next Xvalue
 
 
cboXvalue.ListIndex = 0
 
For Yvalue = 0 To 15
    cboYvalue.AddItem CStr(Yvalue)
Next Yvalue
 
 
cboYvalue.ListIndex = 0
 
MSComm1.CommPort = 1
 
 
MSComm1.Settings = "9600,N,8,1"
 
 
MSComm1.DTREnable = False
 
 
MSComm1.PortOpen = True
 
End Sub
 
Private Sub cmdSend_Click()
Dim Xvalue As Long
Dim Yvalue As Long
 
 
Xvalue = cboXvalue.ListIndex
Yvalue = cboYvalue.ListIndex
 
 
MSComm1.Output = Chr$(255) & Chr$(Xvalue) & Chr$(Yvalue)
 
End Sub
Private Sub Form_Unload(Cancel As Integer)
MSComm1.PortOpen = False
End Sub

[debasisdas]

If you are entering value from combo how can anyone enter value more than that ?