From 443a9fa2bd2d934abaef61715f0e9bcfeb50eadc Mon Sep 17 00:00:00 2001
From: Wladimir Leuschner <wladimir.leuschner@qt.io>
Date: Mon, 22 May 2023 12:05:11 +0300
Subject: [PATCH] Use correct parameters to query highcontrastmode on Windows

Task-number: QTBUG-113645
Change-Id: Ib400253a5589345648025c22c1487598cbefbd23
Pick-to: 6.5
Reviewed-by: Yuhang Zhao <yuhangzhao@deepin.org>
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
(cherry picked from commit e5c136c1797ca9a5f4763bfe30c570f6c4faf64f)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/plugins/platforms/windows/qwindowstheme.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/plugins/platforms/windows/qwindowstheme.cpp b/src/plugins/platforms/windows/qwindowstheme.cpp
index febec34d683..4fccec98fb6 100644
--- a/src/plugins/platforms/windows/qwindowstheme.cpp
+++ b/src/plugins/platforms/windows/qwindowstheme.cpp
@@ -1107,7 +1107,11 @@ bool QWindowsTheme::queryDarkMode()
 
 bool QWindowsTheme::queryHighContrast()
 {
-    return booleanSystemParametersInfo(SPI_GETHIGHCONTRAST, false);
+    HIGHCONTRAST hcf = {};
+    hcf.cbSize = static_cast<UINT>(sizeof(HIGHCONTRAST));
+    if (SystemParametersInfo(SPI_GETHIGHCONTRAST, hcf.cbSize, &hcf, FALSE))
+        return hcf.dwFlags & HCF_HIGHCONTRASTON;
+    return false;
 }
 
 QPlatformMenuItem *QWindowsTheme::createPlatformMenuItem() const