Fix position error on windows 10

In windows 10, there is a invisible borders.
When window's position is set to (0, 0), there will be some gap
between screen left border and game window left border.

This commit fix the issue with solution provided in:
https://stackoverflow.com/a/34143777/1277762

d2gl/src/win32.cpp

@@ -22,6 +22,7 @@
 #include "helpers.h"
 #include "modules/hd_cursor.h"
 #include "option/menu.h"
+#include "dwmapi.h"
 
 #include <detours/detours.h>
 
@@ -358,15 +359,22 @@ void setWindowRect()
 
 		SetWindowLong(App.hwnd, GWL_STYLE, App.window.style);
 
-		RECT wr_test = { 0 };
-		AdjustWindowRect(&wr_test, App.window.style, FALSE);
-
-		wr.left -= wr_test.left;
-		wr.right -= wr_test.left;
-		wr.top -= wr_test.top;
-		wr.bottom -= wr_test.top;
+		// show window first to get GetWindowRect works
+		SetWindowPos_Og(App.hwnd, HWND_NOTOPMOST, wr.left, wr.top, (wr.right - wr.left), (wr.bottom - wr.top), SWP_SHOWWINDOW);
 
-		AdjustWindowRect(&wr, App.window.style, FALSE);
+		// Get the invisible borders
+		RECT wr_test = { 0 };
+		DwmGetWindowAttribute(App.hwnd, DWMWA_EXTENDED_FRAME_BOUNDS, &wr_test, sizeof(wr_test));
+
+		RECT border;
+		border.left = wr_test.left - wr.left;
+		border.top = wr_test.top - wr.top;
+		border.right = wr.right - wr_test.right;
+		border.bottom = wr.bottom - wr_test.bottom;
+		wr.left -= border.left;
+		wr.top -= border.top;
+		wr.right += border.right;
+		wr.bottom += border.bottom;
 		SetWindowPos_Og(App.hwnd, HWND_NOTOPMOST, wr.left, wr.top, (wr.right - wr.left), (wr.bottom - wr.top), SWP_SHOWWINDOW);
 		trace_log("Switched to windowed mode: %d x %d", App.window.size.x, App.window.size.y);
 	} else {