diff --git a/RimeWithWeasel/RimeWithWeasel.cpp b/RimeWithWeasel/RimeWithWeasel.cpp
index 7525e5a17..e60411160 100644
--- a/RimeWithWeasel/RimeWithWeasel.cpp
+++ b/RimeWithWeasel/RimeWithWeasel.cpp
@@ -806,6 +806,7 @@ static void _UpdateUIStyle(RimeConfig* config, UI* ui, bool initialize)
 		style.font_point = 12;
 	_RimeGetIntWithFallback(config, "style/label_font_point", &style.label_font_point, "style/font_point", _abs);
 	_RimeGetIntWithFallback(config, "style/comment_font_point", &style.comment_font_point, "style/font_point", _abs);
+	_RimeGetIntWithFallback(config, "style/mouse_hover_ms", &style.mouse_hover_ms, NULL, _abs);
 	_RimeGetBool(config, "style/inline_preedit", initialize, style.inline_preedit, true, false);
 	_RimeGetBool(config, "style/vertical_auto_reverse", initialize, style.vertical_auto_reverse, true, false);
 	const std::map<std::string, UIStyle::PreeditType> _preeditMap = { 
diff --git a/WeaselUI/WeaselPanel.cpp b/WeaselUI/WeaselPanel.cpp
index ae3861de2..a74079f18 100644
--- a/WeaselUI/WeaselPanel.cpp
+++ b/WeaselUI/WeaselPanel.cpp
@@ -161,7 +161,6 @@ void WeaselPanel::_InitFontRes(void)
 	dpi = dpiX;
 }
 
-#ifdef USE_MOUSE_EVENTS
 static HBITMAP CopyDCToBitmap(HDC hDC, LPRECT lpRect)
 {
 	if (!hDC || !lpRect || IsRectEmpty(lpRect)) return NULL;
@@ -289,9 +288,9 @@ LRESULT WeaselPanel::OnLeftClicked(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL
 	return 0;
 }
 
-#ifdef USE_MOUSE_HOVER
 LRESULT WeaselPanel::OnMouseHover(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 {
+	if(!m_style.mouse_hover_ms) return 0;
 	CPoint point;
 	point.x = GET_X_LPARAM(lParam);
 	point.y = GET_Y_LPARAM(lParam);
@@ -312,12 +311,12 @@ LRESULT WeaselPanel::OnMouseHover(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL&
 
 LRESULT WeaselPanel::OnMouseMove(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
 {
-	if (m_mouse_entry == false)
+	if (m_mouse_entry == false && m_style.mouse_hover_ms)
 	{
 		TRACKMOUSEEVENT tme;
 		tme.cbSize = sizeof(TRACKMOUSEEVENT);
 		tme.dwFlags = TME_HOVER | TME_LEAVE;
-		tme.dwHoverTime = 400; // 400 ms 
+		tme.dwHoverTime = m_style.mouse_hover_ms; // unit: ms 
 		tme.hwndTrack = m_hWnd;
 		TrackMouseEvent(&tme);
 	}
@@ -329,8 +328,6 @@ LRESULT WeaselPanel::OnMouseLeave(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL&
 	m_mouse_entry = false;
 	return 0;
 }
-#endif /*  USE_MOUSE_HOVER */
-#endif /* USE_MOUSE_EVENTS */
 
 void WeaselPanel::_HighlightText(CDCHandle &dc, CRect rc, COLORREF color, COLORREF shadowColor, int radius, BackType type = BackType::TEXT, IsToRoundStruct rd = IsToRoundStruct(), COLORREF bordercolor=TRANS_COLOR)
 {
@@ -797,10 +794,8 @@ void WeaselPanel::DoPaint(CDCHandle dc)
 	}
 	_LayerUpdate(rcw, memDC);
 
-#ifdef USE_MOUSE_EVENTS
 	// turn off WS_EX_TRANSPARENT after drawings, for better resp performance
 	::SetWindowLong(m_hWnd, GWL_EXSTYLE, ::GetWindowLong(m_hWnd, GWL_EXSTYLE) & (~WS_EX_TRANSPARENT));
-#endif
 	// clean objs
 	::DeleteDC(memDC);
 	::DeleteObject(memBitmap);
diff --git a/WeaselUI/WeaselPanel.h b/WeaselUI/WeaselPanel.h
index 37435c0e0..4eac7e12f 100644
--- a/WeaselUI/WeaselPanel.h
+++ b/WeaselUI/WeaselPanel.h
@@ -28,32 +28,24 @@ class WeaselPanel :
 		MESSAGE_HANDLER(WM_CREATE, OnCreate)
 		MESSAGE_HANDLER(WM_DESTROY, OnDestroy)
 		MESSAGE_HANDLER(WM_DPICHANGED, OnDpiChanged)
-#ifdef USE_MOUSE_EVENTS
 		MESSAGE_HANDLER(WM_MOUSEACTIVATE, OnMouseActivate)
 		MESSAGE_HANDLER(WM_LBUTTONDOWN, OnLeftClicked)
 		MESSAGE_HANDLER(WM_MOUSEWHEEL, OnMouseWheel)
-#ifdef USE_MOUSE_HOVER
 		MESSAGE_HANDLER(WM_MOUSEHOVER, OnMouseHover)
 		MESSAGE_HANDLER(WM_MOUSEMOVE, OnMouseMove)
 		MESSAGE_HANDLER(WM_MOUSELEAVE, OnMouseLeave)
-#endif /*  USE_MOUSE_HOVER */
-#endif /* USE_MOUSE_EVENTS */
 		CHAIN_MSG_MAP(CDoubleBufferImpl<WeaselPanel>)
 	END_MSG_MAP()
 
 	LRESULT OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
 	LRESULT OnDestroy(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
 	LRESULT OnDpiChanged(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
-#ifdef USE_MOUSE_EVENTS
 	LRESULT OnMouseActivate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
 	LRESULT OnLeftClicked(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
 	LRESULT OnMouseWheel(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
-#ifdef USE_MOUSE_HOVER
 	LRESULT OnMouseHover(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
 	LRESULT OnMouseMove(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
 	LRESULT OnMouseLeave(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
-#endif /*  USE_MOUSE_HOVER */
-#endif	/* USE_MOUSE_EVENTS */
 
 	WeaselPanel(weasel::UI &ui);
 	~WeaselPanel();
@@ -65,12 +57,8 @@ class WeaselPanel :
 
 private:
 	void _InitFontRes(void);
-#ifdef USE_MOUSE_EVENTS
 	void _CaptureRect(CRect& rect);
-#ifdef USE_MOUSE_HOVER
 	bool m_mouse_entry = false;
-#endif /*  USE_MOUSE_HOVER */
-#endif	/* USE_MOUSE_EVENTS */
 	void _CreateLayout();
 	void _ResizeWindow();
 	void _RepositionWindow(bool adj = false);
diff --git a/include/WeaselCommon.h b/include/WeaselCommon.h
index 7f2971c74..f71758828 100644
--- a/include/WeaselCommon.h
+++ b/include/WeaselCommon.h
@@ -9,8 +9,6 @@
 #define WEASEL_REG_KEY L"Software\\Rime\\Weasel"
 #define RIME_REG_KEY L"Software\\Rime"
 
-#define USE_MOUSE_EVENTS
-#define USE_MOUSE_HOVER
 //#define USE_SHARP_COLOR_CODE
 
 //#define _DEBUG_
@@ -285,6 +283,7 @@ namespace weasel
 		std::wstring font_face;
 		std::wstring label_font_face;
 		std::wstring comment_font_face;
+		int mouse_hover_ms;
 		int font_point;
 		int label_font_point;
 		int comment_font_point;
@@ -347,6 +346,7 @@ namespace weasel
 		UIStyle() : font_face(),
 			label_font_face(),
 			comment_font_face(),
+			mouse_hover_ms(0),
 			font_point(0),
 			label_font_point(0),
 			comment_font_point(0),
@@ -421,6 +421,7 @@ namespace weasel
 					|| font_face != st.font_face
 					|| label_font_face != st.label_font_face
 					|| comment_font_face != st.comment_font_face
+					|| mouse_hover_ms != st.mouse_hover_ms
 					|| font_point != st.font_point
 					|| label_font_point != st.label_font_point
 					|| comment_font_point != st.comment_font_point
@@ -486,6 +487,7 @@ namespace boost {
 			ar & s.font_face;
 			ar & s.label_font_face;
 			ar & s.comment_font_face;
+			ar & s.mouse_hover_ms;
 			ar & s.font_point;
 			ar & s.label_font_point;
 			ar & s.comment_font_point;
diff --git a/output/data/weasel.yaml b/output/data/weasel.yaml
index 26937704a..4830e8d8c 100644
--- a/output/data/weasel.yaml
+++ b/output/data/weasel.yaml
@@ -26,6 +26,7 @@ style:
   display_tray_icon: false
   label_format: "%s."
   mark_text: ""
+  mouse_hover_ms: 0
   vertical_auto_reverse: false
   vertical_text: false
   vertical_text_left_to_right: false