How to program a POS Printer using USB on Visual Basic 6

Question

How to program a POS Printer using USB on Visual Basic 6

Answer 1

To access the printer settings, you can use the API function DocumentProperties. Here's the declaration for VB6:

Public Declare Function DocumentProperties Lib "winspool.drv" Alias "DocumentPropertiesA"_
  (ByVal hwnd As Long, ByVal hPrinter As Long, ByVal pDeviceName As String, _
  ByRef pDevModeOutput As DEVMODE, ByRef pDevModeInput As DEVMODE, _
  ByVal fMode As Long) As Long

Here are some details: http://support.microsoft.com/kb/167345

You can use the other API printing functions to print to any windows printer: http://msdn.microsoft.com/en-us/library/dd162861(VS.85).aspx