diff --git a/widget/framelesswidget/framelesscore/framelessdialog.cpp b/widget/framelesswidget/framelesscore/framelessdialog.cpp
index 5e10e65..29d28f8 100644
--- a/widget/framelesswidget/framelesscore/framelessdialog.cpp
+++ b/widget/framelesswidget/framelesscore/framelessdialog.cpp
@@ -273,6 +273,10 @@ bool FramelessDialog::nativeEvent(const QByteArray &eventType, void *message, lo
         if (msg->message == WM_NCCALCSIZE) {
             *result = 0;
             return true;
+        } else if (msg->message == WM_SYSKEYDOWN) {
+            //屏蔽alt键按下
+        } else if (msg->message == WM_SYSKEYUP) {
+            //屏蔽alt键松开
         } else if (msg->message == WM_NCHITTEST) {
             //计算鼠标对应的屏幕坐标
             //这里最开始用的 LOWORD HIWORD 在多屏幕的时候会有问题
diff --git a/widget/framelesswidget/framelesscore/framelessmainwindow.cpp b/widget/framelesswidget/framelesscore/framelessmainwindow.cpp
index 66a24cf..6a07dc9 100644
--- a/widget/framelesswidget/framelesscore/framelessmainwindow.cpp
+++ b/widget/framelesswidget/framelesscore/framelessmainwindow.cpp
@@ -273,6 +273,10 @@ bool FramelessMainWindow::nativeEvent(const QByteArray &eventType, void *message
         if (msg->message == WM_NCCALCSIZE) {
             *result = 0;
             return true;
+        } else if (msg->message == WM_SYSKEYDOWN) {
+            //屏蔽alt键按下
+        } else if (msg->message == WM_SYSKEYUP) {
+            //屏蔽alt键松开
         } else if (msg->message == WM_NCHITTEST) {
             //计算鼠标对应的屏幕坐标
             //这里最开始用的 LOWORD HIWORD 在多屏幕的时候会有问题
diff --git a/widget/framelesswidget/framelesscore/framelesswidget.cpp b/widget/framelesswidget/framelesscore/framelesswidget.cpp
index 37632f1..d4bb8b4 100644
--- a/widget/framelesswidget/framelesscore/framelesswidget.cpp
+++ b/widget/framelesswidget/framelesscore/framelesswidget.cpp
@@ -273,6 +273,10 @@ bool FramelessWidget::nativeEvent(const QByteArray &eventType, void *message, lo
         if (msg->message == WM_NCCALCSIZE) {
             *result = 0;
             return true;
+        } else if (msg->message == WM_SYSKEYDOWN) {
+            //屏蔽alt键按下
+        } else if (msg->message == WM_SYSKEYUP) {
+            //屏蔽alt键松开
         } else if (msg->message == WM_NCHITTEST) {
             //计算鼠标对应的屏幕坐标
             //这里最开始用的 LOWORD HIWORD 在多屏幕的时候会有问题