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Add OpenPrinter and ClosePrinter and supporting access flags. #44

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Add OpenPrinter and ClosePrinter and supporting access flags. #44

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ab24d61
Add OpenPrinter and ClosePrinter and supporting access flags.
Feb 16, 2018
7ef8971
Merge branch 'master' into openPrinter
ahenager May 6, 2019
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2 changes: 2 additions & 0 deletions win.go
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,8 @@ type (
HRESULT int32
)

const STANDARD_RIGHTS_REQUIRED = 0x000F0000

func SUCCEEDED(hr HRESULT) bool {
return hr >= 0
}
Expand Down
34 changes: 34 additions & 0 deletions winspool.go
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Original file line number Diff line number Diff line change
Expand Up @@ -24,12 +24,26 @@ const (
PRINTER_ENUM_NETWORK = 0x00000040
)

// Printer access flags
const (
PRINTER_ACCESS_ADMINISTER = 0x00000004
PRINTER_ACCESS_USE = 0x00000008
PRINTER_ACCESS_MANAGE_LIMITED = 0x00000040
PRINTER_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED | PRINTER_ACCESS_ADMINISTER | PRINTER_ACCESS_USE)
)

type PRINTER_INFO_4 struct {
PPrinterName *uint16
PServerName *uint16
Attributes uint32
}

type PRINTER_DEFAULTS struct {
PDatatype *uint16
LPDevMode *DEVMODE
DesiredAccess ACCESS_MASK
}

var (
// Library
libwinspool *windows.LazyDLL
Expand All @@ -39,6 +53,8 @@ var (
documentProperties *windows.LazyProc
enumPrinters *windows.LazyProc
getDefaultPrinter *windows.LazyProc
openPrinter *windows.LazyProc
closePrinter *windows.LazyProc
)

func init() {
Expand All @@ -50,6 +66,8 @@ func init() {
documentProperties = libwinspool.NewProc("DocumentPropertiesW")
enumPrinters = libwinspool.NewProc("EnumPrintersW")
getDefaultPrinter = libwinspool.NewProc("GetDefaultPrinterW")
openPrinter = libwinspool.NewProc("OpenPrinterW")
closePrinter = libwinspool.NewProc("ClosePrinter")
}

func DeviceCapabilities(pDevice, pPort *uint16, fwCapability uint16, pOutput *uint16, pDevMode *DEVMODE) uint32 {
Expand Down Expand Up @@ -99,3 +117,19 @@ func GetDefaultPrinter(pszBuffer *uint16, pcchBuffer *uint32) bool {

return ret != 0
}

func OpenPrinter(pPrinterName *uint16, phPrinter *HANDLE, pDefault *PRINTER_DEFAULTS) bool {
ret, _, _ := syscall.Syscall(openPrinter, 3,
uintptr(unsafe.Pointer(pPrinterName)),
uintptr(unsafe.Pointer(phPrinter)),
uintptr(unsafe.Pointer(pDefault)))

return ret != 0
}

func ClosePrinter(phPrinter *HANDLE) bool {
ret, _, _ := syscall.Syscall(closePrinter, 1,
uintptr(unsafe.Pointer(phPrinter)), 0, 0)

return ret != 0
}