Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Const EM_GETLINECOUNT = &HBA
Private Sub Command1_Click()
Dim LineCount As Long
LineCount = SendMessage(Text1.hwnd, EM_GETLINECOUNT, ByVal 0&, ByVal 0&)
MsgBox LineCount
End Sub