请各位帮忙:
如果我一次给打印机3000条。之后我想由软件自动测试打印机是否打完了。如果是,则由软件再发给打印机3000条。
怎样可以测试。请详细一点。 2.我想打印10000条。但要保证打印机不会死。又该怎么办??
请各位大侠详细一点。
如果我一次给打印机3000条。之后我想由软件自动测试打印机是否打完了。如果是,则由软件再发给打印机3000条。
怎样可以测试。请详细一点。 2.我想打印10000条。但要保证打印机不会死。又该怎么办??
请各位大侠详细一点。
Private Declare Function ClosePrinter Lib "winspool.drv" (ByVal hPrinter As Long) As Long
Private Declare Function EnumJobs Lib "winspool.drv" Alias "EnumJobsA" (ByVal hPrinter As Long, ByVal FirstJob As Long, ByVal NoJobs As Long, ByVal Level As Long, pJob As Any, ByVal cdBuf As Long, pcbNeeded As Long, pcReturned As Long) As Long
Private Sub Form_Load() Dim hPrinter As Long, lNeeded As Long, lReturned As Long
Dim lJobCount As Long
OpenPrinter Printer.DeviceName, hPrinter, ByVal 0&
EnumJobs hPrinter, 0, 99, 1, ByVal 0&, 0, lNeeded, lReturned
If lNeeded > 0 Then
ReDim byteJobsBuffer(lNeeded - 1) As Byte
EnumJobs hPrinter, 0, 99, 1, byteJobsBuffer(0), lNeeded, lNeeded, lReturned
If lReturned > 0 Then
lJobCount = lReturned
Else
lJobCount = 0
End If
Else
lJobCount = 0
End If
ClosePrinter hPrinter
If lJobCount = 0 Then
MsgBox "没有打印作业!"
Else
MsgBox "打印队列项: " + CStr(lJobCount), vbInformation
End If
End Sub