diff --git a/Sandboxie/core/dll/gui.c b/Sandboxie/core/dll/gui.c
index 90bb5b8d..adc525cf 100644
--- a/Sandboxie/core/dll/gui.c
+++ b/Sandboxie/core/dll/gui.c
@@ -1374,9 +1374,13 @@ _FX HWND Gui_CreateWindowExW(
         else
             hWndParent = NULL;
     }
-	if (SbieApi_QueryConfBool(NULL, "BlockInterferenceControl", FALSE))
+	
+	if (Gui_BlockInterferenceControl){
+	
 		if (dwExStyle & WS_EX_TOPMOST)
 			dwExStyle = dwExStyle & ~WS_EX_TOPMOST;
+	}
+			
     //
     // create window
     //
@@ -1480,9 +1484,11 @@ _FX HWND Gui_CreateWindowExA(
     else
         clsnm = Gui_CreateClassNameA(lpClassName);
 
-	if (SbieApi_QueryConfBool(NULL, "BlockInterferenceControl", FALSE))
+	if (Gui_BlockInterferenceControl){
+	
 		if (dwExStyle & WS_EX_TOPMOST)
 			dwExStyle = dwExStyle & ~WS_EX_TOPMOST;
+	}
 
     if (hWndParent && (hWndParent != HWND_MESSAGE)
                             && (! __sys_IsWindow(hWndParent))) {
@@ -1938,21 +1944,27 @@ _FX BOOL Gui_MoveWindow(
         SetLastError(ERROR_INVALID_WINDOW_HANDLE);
         return FALSE;
     }
-	if (SbieApi_QueryConfBool(NULL, L"BlockInterferenceControl", FALSE)) {
-		RECT rt;
-		typedef (*P_SystemParametersInfoA)(UINT  uiAction,
-			UINT  uiParam,
-			PVOID pvParam,
-			UINT  fWinIni);
-		typedef (*P_GetSystemMetrics)(int nIndex);
-		P_SystemParametersInfoA SystemParametersInfoA = Ldr_GetProcAddrNew("user32.dll", "SystemParametersInfoA", "SystemParametersInfoA"); if (!SystemParametersInfoA) goto then;
-		P_GetSystemMetrics GetSystemMetrics = Ldr_GetProcAddrNew("user32.dll", "GetSystemMetrics", "GetSystemMetrics"); if (!GetSystemMetrics) goto then;
-		SystemParametersInfoA(SPI_GETWORKAREA, 0, &rt, 0);
-		int   y1 = GetSystemMetrics(SM_CYSCREEN) - rt.bottom;
-		if (y + h > y1)
-			h = y1 - y-2;
-	}
-	then:
+	
+    if (Gui_BlockInterferenceControl) {
+
+        typedef BOOL (*P_SystemParametersInfoA)(UINT uiAction, UINT uiParam, PVOID pvParam, UINT fWinIni);
+        static P_SystemParametersInfoA SystemParametersInfoA = NULL;
+        if (!SystemParametersInfoA) SystemParametersInfoA = Ldr_GetProcAddrNew("user32.dll", "SystemParametersInfoA", "SystemParametersInfoA");
+
+        typedef int (*P_GetSystemMetrics)(int nIndex);
+        static P_GetSystemMetrics GetSystemMetrics = NULL;
+        if (!GetSystemMetrics) GetSystemMetrics = Ldr_GetProcAddrNew("user32.dll", "GetSystemMetrics", "GetSystemMetrics");
+
+        if (SystemParametersInfoA && GetSystemMetrics) {
+
+            RECT rt;
+            SystemParametersInfoA(SPI_GETWORKAREA, 0, &rt, 0);
+            int y1 = GetSystemMetrics(SM_CYSCREEN) - rt.bottom;
+            if (y + h > y1)
+                h = y1 - y - 2;
+        }
+    }
+
     return __sys_MoveWindow(hWnd, x, y, w, h, bRepaint);
 }
 
@@ -1975,23 +1987,30 @@ _FX BOOL Gui_SetWindowPos(
     //
     // use SbieSvc GUI Proxy if hWnd is accessible but outside the sandbox
     //
-	if (SbieApi_QueryConfBool(NULL, L"BlockInterferenceControl", FALSE)) {
-		if (hWndInsertAfter == HWND_TOPMOST || hWndInsertAfter == HWND_TOP)
-			hWndInsertAfter = HWND_DESKTOP;
-		RECT rt;
-		typedef (*P_SystemParametersInfoA)(UINT  uiAction,
-			UINT  uiParam,
-			PVOID pvParam,
-			UINT  fWinIni);
-		typedef (*P_GetSystemMetrics)(int nIndex);
-		P_SystemParametersInfoA SystemParametersInfoA = Ldr_GetProcAddrNew("user32.dll", "SystemParametersInfoA", "SystemParametersInfoA"); if (!SystemParametersInfoA) goto then;
-		P_GetSystemMetrics GetSystemMetrics = Ldr_GetProcAddrNew("user32.dll", "GetSystemMetrics", "GetSystemMetrics"); if (!GetSystemMetrics) goto then;
-		SystemParametersInfoA(SPI_GETWORKAREA, 0, &rt, 0);   
-		int   y1 = GetSystemMetrics(SM_CYSCREEN) - rt.bottom;
-		if (y+h > y1)
-			h = y1-y - 2;
-	}
-	then:
+	
+    if (Gui_BlockInterferenceControl) {
+
+        if (hWndInsertAfter == HWND_TOPMOST || hWndInsertAfter == HWND_TOP)
+            hWndInsertAfter = HWND_DESKTOP;
+
+        typedef BOOL (*P_SystemParametersInfoA)(UINT uiAction, UINT uiParam, PVOID pvParam, UINT fWinIni);
+        static P_SystemParametersInfoA SystemParametersInfoA = NULL;
+        if (!SystemParametersInfoA) SystemParametersInfoA = Ldr_GetProcAddrNew("user32.dll", "SystemParametersInfoA", "SystemParametersInfoA");
+
+        typedef int (*P_GetSystemMetrics)(int nIndex);
+        static P_GetSystemMetrics GetSystemMetrics = NULL;
+        if (!GetSystemMetrics) GetSystemMetrics = Ldr_GetProcAddrNew("user32.dll", "GetSystemMetrics", "GetSystemMetrics");
+
+        if (SystemParametersInfoA && GetSystemMetrics) {
+
+            RECT rt;
+            SystemParametersInfoA(SPI_GETWORKAREA, 0, &rt, 0);
+            int y1 = GetSystemMetrics(SM_CYSCREEN) - rt.bottom;
+            if (y + h > y1)
+                h = y1 - y - 2;
+        }
+    }
+	
     if (Gui_UseProxyService && !Gui_IsSameBox(hWnd, NULL, NULL)) {
 
         GUI_SET_WINDOW_POS_REQ req;
diff --git a/Sandboxie/core/dll/gui_p.h b/Sandboxie/core/dll/gui_p.h
index 2d3fcf56..03afd243 100644
--- a/Sandboxie/core/dll/gui_p.h
+++ b/Sandboxie/core/dll/gui_p.h
@@ -502,6 +502,8 @@ extern BOOLEAN Gui_OpenAllWinClasses;   // not running in a restricted job
 extern BOOLEAN Gui_UseProtectScreen;
 extern BOOLEAN Gui_UseBlockCapture;
 
+extern BOOLEAN Gui_BlockInterferenceControl;
+
 extern BOOLEAN Gui_UseProxyService;
 
 extern BOOLEAN Gui_DisableTitle;
diff --git a/Sandboxie/core/dll/guimisc.c b/Sandboxie/core/dll/guimisc.c
index 3058d1c2..8ab172f8 100644
--- a/Sandboxie/core/dll/guimisc.c
+++ b/Sandboxie/core/dll/guimisc.c
@@ -171,7 +171,7 @@ static ULONG Gui_OpenClipboard_seq  = -1;
 
 static HANDLE Gui_DummyInputDesktopHandle = NULL;
 
-static BOOLEAN Gui_BlockInterferenceControl = FALSE;
+       BOOLEAN Gui_BlockInterferenceControl = FALSE;
 
 
 //---------------------------------------------------------------------------
@@ -201,10 +201,10 @@ _FX BOOLEAN Gui_InitMisc(HMODULE module)
 		SBIEDLL_HOOK_GUI(ClipCursor);
         SBIEDLL_HOOK_GUI(SwapMouseButton);
         SBIEDLL_HOOK_GUI(SetDoubleClickTime);
-		SBIEDLL_HOOK_GUI(ShowCursor);
-		SBIEDLL_HOOK_GUI(BringWindowToTop);
-		SBIEDLL_HOOK_GUI(SwitchToThisWindow);
-		SBIEDLL_HOOK_GUI(SetActiveWindow);
+        SBIEDLL_HOOK_GUI(ShowCursor);
+        SBIEDLL_HOOK_GUI(BringWindowToTop);
+        SBIEDLL_HOOK_GUI(SwitchToThisWindow);
+        SBIEDLL_HOOK_GUI(SetActiveWindow);
 		
         if (Gui_UseBlockCapture) {
             SBIEDLL_HOOK_GUI(GetWindowDC);
@@ -1648,25 +1648,53 @@ _FX EXECUTION_STATE Gui_SetThreadExecutionState(EXECUTION_STATE esFlags)
 	//return __sys_SetThreadExecutionState(esFlags);
 }
 
-_FX int Gui_ShowCursor(BOOL bShow) {
+
+//---------------------------------------------------------------------------
+// Gui_ShowCursor
+//---------------------------------------------------------------------------
+
+
+_FX int Gui_ShowCursor(BOOL bShow) 
+{
 	if (Gui_BlockInterferenceControl && !bShow)
 		return 0;
 	return __sys_ShowCursor(bShow);
 }
 
-_FX HWND Gui_SetActiveWindow(HWND hWnd) {
+
+//---------------------------------------------------------------------------
+// Gui_SetActiveWindow
+//---------------------------------------------------------------------------
+
+
+_FX HWND Gui_SetActiveWindow(HWND hWnd) 
+{
 	if (Gui_BlockInterferenceControl)
 		return NULL;
 	return __sys_SetActiveWindow(hWnd);
 }
 
-_FX BOOL  Gui_BringWindowToTop(HWND hWnd) {
+
+//---------------------------------------------------------------------------
+// Gui_BringWindowToTop
+//---------------------------------------------------------------------------
+
+
+_FX BOOL  Gui_BringWindowToTop(HWND hWnd) 
+{
 	if (Gui_BlockInterferenceControl)
 		return FALSE;
 	return __sys_BringWindowToTop(hWnd);
 }
 
-_FX void Gui_SwitchToThisWindow(HWND hWnd, BOOL fAlt) {
+
+//---------------------------------------------------------------------------
+// Gui_SwitchToThisWindow
+//---------------------------------------------------------------------------
+
+
+_FX void Gui_SwitchToThisWindow(HWND hWnd, BOOL fAlt) 
+{
 	if (Gui_BlockInterferenceControl)
 		return;
 	__sys_SwitchToThisWindow(hWnd, fAlt);