From db1b664424b8d610d8caf348bfadbd3c49ede3aa Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Fri, 4 Jan 2019 06:02:19 +0900
Subject: [PATCH] devicescale: Refactoring: define Windows error consts

---
 internal/devicescale/impl_windows.go | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/internal/devicescale/impl_windows.go b/internal/devicescale/impl_windows.go
index 498e43ce9..026aa7aaf 100644
--- a/internal/devicescale/impl_windows.go
+++ b/internal/devicescale/impl_windows.go
@@ -190,8 +190,16 @@ func getDpiForMonitor(hMonitor uintptr, dpiType uintptr, dpiX, dpiY uintptr) err
 func getFromLogPixelSx() float64 {
 	dc, err := getWindowDC(0)
 	if err != nil {
+		const (
+			errorInvalidWindowHandle  = 1400
+			errorResourceDataNotFound = 1812
+		)
 		// On Wine, it looks like GetWindowDC(0) doesn't work (#738, #743).
-		if code := err.(*winErr).Code; code == 1400 || code == 1812 {
+		code := err.(*winErr).Code
+		if code == errorInvalidWindowHandle {
+			return 1
+		}
+		if code == errorResourceDataNotFound {
 			return 1
 		}
 		panic(err)