Get Screen Resolution With API

'Add a module to your project (In the menu choose Project -> Add Module, Then click Open)
'Insert this code to the module :

Declare Function GetSystemMetrics Lib "user32" (ByVal nIndex As Long) As Long
Public Const SM_CXSCREEN = 0
Public Const SM_CYSCREEN = 1

'Insert this code to your form:

Private Sub Form_Load()
Dim Tmp As String
Tmp = GetSystemMetrics(SM_CXSCREEN) & _
"x" & GetSystemMetrics(SM_CYSCREEN)
MsgBox (Tmp)
End Sub