3 files changed, 78 insertions, 0 deletions
diff --git a/setupapi/setupapi_windows.go b/setupapi/setupapi_windows.go
index a48042f..43d0d28 100644
--- a/setupapi/setupapi_windows.go
+++ b/setupapi/setupapi_windows.go
@@ -227,3 +227,16 @@ func SetupDiClassGuidsFromNameEx(ClassName string, MachineName string) (ClassGui
 
 	return
 }
+
+//sys	setupDiGetSelectedDevice(DeviceInfoSet DevInfo, DeviceInfoData *SP_DEVINFO_DATA) (err error) = setupapi.SetupDiGetSelectedDevice
+
+// SetupDiGetSelectedDevice function retrieves the selected device information element in a device information set.
+func SetupDiGetSelectedDevice(DeviceInfoSet DevInfo) (DeviceInfoData *SP_DEVINFO_DATA, err error) {
+	data := SP_DEVINFO_DATA{}
+	data.Size = uint32(unsafe.Sizeof(data))
+
+	return &data, setupDiGetSelectedDevice(DeviceInfoSet, &data)
+}
+
+// SetupDiSetSelectedDevice function sets a device information element as the selected member of a device information set. This function is typically used by an installation wizard.
+//sys	SetupDiSetSelectedDevice(DeviceInfoSet DevInfo, DeviceInfoData *SP_DEVINFO_DATA) (err error) = setupapi.SetupDiSetSelectedDevice
diff --git a/setupapi/setupapi_windows_test.go b/setupapi/setupapi_windows_test.go
index 4e07ed2..8d5453f 100644
--- a/setupapi/setupapi_windows_test.go
+++ b/setupapi/setupapi_windows_test.go
@@ -251,3 +251,42 @@ func TestSetupDiClassGuidsFromNameEx(t *testing.T) {
 		t.Errorf("SetupDiClassGuidsFromNameEx(\"foobar-34274a51-a6e6-45f0-80d6-c62be96dd5fe\") should return an empty GUID set")
 	}
 }
+
+func TestSetupDiGetSelectedDevice(t *testing.T) {
+	devInfoList, err := SetupDiGetClassDevsEx(&deviceClassNetGUID, "", 0, DIGCF_PRESENT, DevInfo(0), "")
+	if err != nil {
+		t.Errorf("Error calling SetupDiGetClassDevsEx: %s", err.Error())
+	}
+	defer devInfoList.Close()
+
+	for i := 0; true; i++ {
+		data, err := SetupDiEnumDeviceInfo(devInfoList, i)
+		if err != nil {
+			if errWin, ok := err.(syscall.Errno); ok && errWin == 259 /*ERROR_NO_MORE_ITEMS*/ {
+				break
+			}
+			continue
+		}
+
+		err = SetupDiSetSelectedDevice(devInfoList, data)
+		if err != nil {
+			t.Errorf("Error calling SetupDiSetSelectedDevice: %s", err.Error())
+		}
+
+		data2, err := SetupDiGetSelectedDevice(devInfoList)
+		if err != nil {
+			t.Errorf("Error calling SetupDiGetSelectedDevice: %s", err.Error())
+		} else if *data != *data2 {
+			t.Error("SetupDiGetSelectedDevice returned different data than was set by SetupDiSetSelectedDevice")
+		}
+	}
+
+	err = SetupDiSetSelectedDevice(devInfoList, nil)
+	if err == nil {
+		t.Errorf("SetupDiSetSelectedDevice(nil) should fail")
+	} else {
+		if errWin, ok := err.(syscall.Errno); !ok || errWin != 87 /*ERROR_INVALID_PARAMETER*/ {
+			t.Errorf("SetupDiSetSelectedDevice(nil) should fail with ERROR_INVALID_USER_BUFFER")
+		}
+	}
+}
diff --git a/setupapi/zsetupapi_windows.go b/setupapi/zsetupapi_windows.go
index 46a02c4..3a0b441 100644
--- a/setupapi/zsetupapi_windows.go
+++ b/setupapi/zsetupapi_windows.go
@@ -53,6 +53,8 @@ var (
 	procSetupDiSetClassInstallParamsW   = modsetupapi.NewProc("SetupDiSetClassInstallParamsW")
 	procSetupDiClassNameFromGuidExW     = modsetupapi.NewProc("SetupDiClassNameFromGuidExW")
 	procSetupDiClassGuidsFromNameExW    = modsetupapi.NewProc("SetupDiClassGuidsFromNameExW")
+	procSetupDiGetSelectedDevice        = modsetupapi.NewProc("SetupDiGetSelectedDevice")
+	procSetupDiSetSelectedDevice        = modsetupapi.NewProc("SetupDiSetSelectedDevice")
 )
 
 func setupDiCreateDeviceInfoListEx(ClassGUID *windows.GUID, hwndParent uintptr, MachineName *uint16, Reserved uintptr) (handle DevInfo, err error) {
@@ -225,3 +227,27 @@ func setupDiClassGuidsFromNameEx(ClassName *uint16, ClassGuidList *windows.GUID,
 	}
 	return
 }
+
+func setupDiGetSelectedDevice(DeviceInfoSet DevInfo, DeviceInfoData *SP_DEVINFO_DATA) (err error) {
+	r1, _, e1 := syscall.Syscall(procSetupDiGetSelectedDevice.Addr(), 2, uintptr(DeviceInfoSet), uintptr(unsafe.Pointer(DeviceInfoData)), 0)
+	if r1 == 0 {
+		if e1 != 0 {
+			err = errnoErr(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}
+
+func SetupDiSetSelectedDevice(DeviceInfoSet DevInfo, DeviceInfoData *SP_DEVINFO_DATA) (err error) {
+	r1, _, e1 := syscall.Syscall(procSetupDiSetSelectedDevice.Addr(), 2, uintptr(DeviceInfoSet), uintptr(unsafe.Pointer(DeviceInfoData)), 0)
+	if r1 == 0 {
+		if e1 != 0 {
+			err = errnoErr(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}