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[DllImport("winspool.drv", EntryPoint="StartDocPrinterW", SetLastError=true,

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private static extern uint StartDocPrinter(

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[DllImport("winspool.drv", EntryPoint="StartDocPrinterA", SetLastError=true,

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private static extern uint StartDocPrinter(

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Structure StartDocPrinter

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  Public Function StartDocPrinter(hPrinter As IntPtr, Level As Integer, ByRef pDocInfo As DOC_INFO_1W) As Long

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  Public Function StartDocPrinter(hPrinter As IntPtr, Level As Integer, ByRef pDocInfo As DOC_INFO_1A) As Long

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Documentation

[StartDocPrinter] on MSDN

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        /// A StartDocPrinter call was not issued.

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        if( StartDocPrinter(hPrinter, 1, di) )