1 files changed, 33 insertions, 15 deletions
diff --git a/setupapi/setupapi_windows.go b/setupapi/setupapi_windows.go
index 22cacee..6e81a9e 100644
--- a/setupapi/setupapi_windows.go
+++ b/setupapi/setupapi_windows.go
@@ -6,6 +6,8 @@
 package setupapi
 
 import (
+	"syscall"
+
 	"golang.org/x/sys/windows"
 )
 
@@ -16,26 +18,42 @@ const (
 type DIGCF uint32
 
 const (
-	Default         DIGCF = 0x00000001
-	Present         DIGCF = 0x00000002
-	AllClasses      DIGCF = 0x00000004
-	Profile         DIGCF = 0x00000008
-	DeviceInterface DIGCF = 0x00000010
-	InterfaceDevice DIGCF = 0x00000010
+	DIGCF_DEFAULT         DIGCF = 0x00000001 // only valid with DIGCF_DEVICEINTERFACE
+	DIGCF_PRESENT         DIGCF = 0x00000002
+	DIGCF_ALLCLASSES      DIGCF = 0x00000004
+	DIGCF_PROFILE         DIGCF = 0x00000008
+	DIGCF_DEVICEINTERFACE DIGCF = 0x00000010
 )
 
 type DevInfo windows.Handle
 
-//sys	setupDiGetClassDevsEx(ClassGuid *windows.GUID, Enumerator *string, hwndParent uintptr, Flags uint32, DeviceInfoSet uintptr, MachineName string, reserved uint32) (handle windows.Handle, err error) = setupapi.SetupDiGetClassDevsExW
+// The SetupDiDestroyDeviceInfoList function deletes a device information set and frees all associated memory.
+func (h DevInfo) Close() error {
+	if h != DevInfo(windows.InvalidHandle) {
+		return SetupDiDestroyDeviceInfoList(h)
+	}
 
-// The SetupDiGetClassDevsEx function returns a handle to a device information set that contains requested device information elements for a local or a remote computer.
-func SetupDiGetClassDevsEx(ClassGuid *windows.GUID, Enumerator string, hwndParent uintptr, Flags DIGCF, DeviceInfoSet DevInfo, MachineName string) (DevInfo, error) {
-	enumerator := &Enumerator
+	return nil
+}
 
-	if Enumerator == "" {
-		enumerator = nil
-	}
+//sys	setupDiGetClassDevsEx(ClassGuid *windows.GUID, Enumerator *uint16, hwndParent uintptr, Flags DIGCF, DeviceInfoSet DevInfo, MachineName *uint16, reserved uintptr) (handle DevInfo, err error) [failretval==DevInfo(windows.InvalidHandle)] = setupapi.SetupDiGetClassDevsExW
+//sys	SetupDiDestroyDeviceInfoList(DeviceInfoSet DevInfo) (err error) = setupapi.SetupDiDestroyDeviceInfoList
 
-	h, err := setupDiGetClassDevsEx(ClassGuid, enumerator, hwndParent, uint32(Flags), uintptr(DeviceInfoSet), MachineName, 0)
-	return DevInfo(h), err
+// The SetupDiGetClassDevsEx function returns a handle to a device information set that contains requested device information elements for a local or a remote computer.
+func SetupDiGetClassDevsEx(ClassGuid *windows.GUID, Enumerator string, hwndParent uintptr, Flags DIGCF, DeviceInfoSet DevInfo, MachineName string) (handle DevInfo, err error) {
+	var _p0 *uint16
+	if Enumerator != "" {
+		_p0, err = syscall.UTF16PtrFromString(Enumerator)
+		if err != nil {
+			return
+		}
+	}
+	var _p1 *uint16
+	if MachineName != "" {
+		_p1, err = syscall.UTF16PtrFromString(MachineName)
+		if err != nil {
+			return
+		}
+	}
+	return setupDiGetClassDevsEx(ClassGuid, _p0, hwndParent, Flags, DeviceInfoSet, _p1, 0)
 }