CreateDC Stopped Working

All of a sudden CreateDC stopped working for one particular printer.

I am printing through the API.

My code looks something like this:
'----- Code snippet -----
Private Declare Function CreateDC Lib "gdi32" Alias "CreateDCA" _
    (ByVal lpDriverName As String, _
     ByVal lpDeviceName As String, _
     ByVal lpOutput As Long, _
     ByVal lpInitData As Long) As Long
Private Declare Function DeviceCapabilities Lib "winspool.drv" Alias "DeviceCapabilitiesA" _
    (ByVal lpDeviceName As String, _
     ByVal lpPort As String, _
     ByVal iIndex As Long, _
     lpOutput As Any, _
     lpDevMode As Any) As Long
Private Declare Function DeviceCapabilities_pt Lib "winspool.drv" Alias "DeviceCapabilitiesA" _
    (ByVal lpDeviceName As String, _
     ByVal lpPort As String, _
     ByVal iIndex As Long, _
     lpOutput As Any, _
     lpDevMode As Any) As Points
Private Const DC_MAXEXTENT = 5
Private Type Points
        x  As Integer
        y  As Integer
End Type

Private Sub Command1_Click()
    Dim result As Long 'Return value for calling API functions
    Dim hPrintDc As Long 'Handle to printer dc
    Dim nPPIx As Integer
    Dim nPPIy As Integer
    Dim myPrinter As String
    myPrinter = "\\mynetwork2\printer2"
   
    Dim pt As Points
    result = DeviceCapabilities(myPrinter, vbNull, DC_MAXEXTENT, ByVal 0&, ByVal 0&)
    pt = DeviceCapabilities_pt(myPrinter, vbNull, DC_MAXEXTENT, ByVal 0&, ByVal 0&)
    nPPIx = (pt.x / 6) * 2
    nPPIy = (pt.y / 4) * 2
   
    hPrintDc = CreateDC("WINSPOOL", myPrinter, 0, 0)
'
'
'
End Sub
'----- End code snippet -----
If I change myPrinter to "\\mynetwork1\printer1" it works fine.
"\\mynetwork1\printer1" is an HP LaserJet
"\\mynetwork2\printer2" is an Zebra label printer

It worked up until yesterday afternoon.  I had been trying to change the printer orientation and was using the HP for testing.
(The code to change orientation can be found here:
https://www.experts-exchange.com/questions/21113934/API-Printing-Orientation.html)
Once it started working on the HP, I switched over the \\mynetwork2\printer2 and got nothing from the label printer.

I single stepped though the code and CreateDC returns 0.  The API call GetLastError() returns 0.

I removed the code to change the orientation but still get nothing.

I've rebooted my machine and the label printer, still nothing.

Printing to "\\mynetwork1\printer1" works fine.

Printing a test page (through Windows 2000's Settings/Printers/Properties) to "\\mynetwork2\printer2" works fine.

Any ideas?