1 files changed, 4 insertions, 0 deletions
diff --git a/win32/PlatWin.h b/win32/PlatWin.h
index 192bdf6a7..86022a0cd 100644
--- a/win32/PlatWin.h
+++ b/win32/PlatWin.h
@@ -32,6 +32,10 @@ constexpr Point PointFromPOINT(POINT pt) noexcept {
 	return Point::FromInts(pt.x, pt.y);
 }
 
+constexpr SIZE SizeOfRect(RECT rc) noexcept {
+	return { rc.right - rc.left, rc.bottom - rc.top };
+}
+
 constexpr HWND HwndFromWindowID(WindowID wid) noexcept {
 	return static_cast<HWND>(wid);
 }