Completes the part of the process that prevents the process from interfering with the system's power operation.

Sandboxie/core/dll/gui.c

@@ -509,6 +509,7 @@ _FX BOOLEAN Gui_Init(HMODULE module)
     GUI_IMPORT_AW(PostMessage);
     GUI_IMPORT_AW(PostThreadMessage);
     GUI_IMPORT_AW(DispatchMessage);
+	GUI_IMPORT___(ShutdownBlockReasonCreate)
 
     GUI_IMPORT_AW(SetWindowsHookEx);
     GUI_IMPORT___(UnhookWindowsHookEx);
@@ -1658,7 +1659,12 @@ _FX LRESULT Gui_WindowProcA(
 		
 	if (uMsg == WM_CREATE)
 		Gui_ProtectScreen(hWnd);
-		
+	if (uMsg == WM_QUERYENDSESSION)
+	{
+		if (SbieApi_QueryConfBool(NULL, "BlockInterferePower", FALSE)) {
+			return TRUE;
+		}
+	}
     wndproc = __sys_GetPropW(hWnd, (LPCWSTR)Gui_WindowProcOldA_Atom);
     lResult = __sys_CallWindowProcA(wndproc, hWnd, uMsg, wParam, new_lParam);
 

Sandboxie/core/dll/gui_p.h

@@ -420,6 +420,10 @@ typedef HDC(*P_GetDCEx)(HWND hWnd,HRGN hrgnClip,DWORD flags);
 
 typedef BOOL (*P_PrintWindow)(HWND hwnd,HDC  hdcBlt,UINT nFlags);
 
+typedef BOOL (*P_ShutdownBlockReasonCreate)(HWND    hWnd,LPCWSTR pwszReason);
+
+typedef EXECUTION_STATE (*P_SetThreadExecutionState)(EXECUTION_STATE esFlags);
+
 typedef BOOL (*P_SetThreadDesktop)(HDESK hDesktop);
 
 typedef BOOL (*P_SwitchDesktop)(HDESK hDesktop);
@@ -571,6 +575,8 @@ GUI_SYS_VAR(IsZoomed)
 GUI_SYS_VAR_2(SendMessage)
 GUI_SYS_VAR_2(SendMessageTimeout)
 //GUI_SYS_VAR_2(SendMessageCallback)
+GUI_SYS_VAR(ShutdownBlockReasonCreate)
+GUI_SYS_VAR(SetThreadExecutionState)
 GUI_SYS_VAR_2(SendNotifyMessage)
 GUI_SYS_VAR_2(PostMessage)
 GUI_SYS_VAR_2(PostThreadMessage)

Sandboxie/core/dll/guimisc.c

@@ -103,6 +103,13 @@ static HDC Gui_GetDC(HWND hWnd);
 static HDC Gui_GetWindowDC(HWND hWnd);
 static HDC Gui_GetDCEx(HWND hWnd, HRGN  hrgnClip, DWORD flags);
 static BOOL Gui_PrintWindow(HWND hwnd,HDC  hdcBlt,UINT nFlags);
+static BOOL Gui_ShutdownBlockReasonCreate(
+	 HWND    hWnd,
+	 LPCWSTR pwszReason
+);
+static EXECUTION_STATE Gui_SetThreadExecutionState(
+	 EXECUTION_STATE esFlags
+);
 //---------------------------------------------------------------------------
 
 
@@ -184,6 +191,8 @@ _FX BOOLEAN Gui_InitMisc(HMODULE module)
 		SBIEDLL_HOOK_GUI(GetDC);
 		SBIEDLL_HOOK_GUI(GetDCEx);
 		SBIEDLL_HOOK_GUI(PrintWindow);
+		SBIEDLL_HOOK_GUI(ShutdownBlockReasonCreate);
+		SBIEDLL_HOOK_GUI(SetThreadExecutionState);
         if (Dll_OsBuild >= 6000) {
 
             //
@@ -1538,3 +1547,27 @@ _FX BOOL Gui_PrintWindow(
 	}
 	return __sys_PrintWindow(hwnd, hdcBlt, nFlags);
 }
+
+//---------------------------------------------------------------------------
+// Gui_ShutdownBlockReasonCreate
+//---------------------------------------------------------------------------
+
+_FX BOOL Gui_ShutdownBlockReasonCreate(
+	[in] HWND    hWnd,
+	[in] LPCWSTR pwszReason
+) {
+	if (SbieApi_QueryConfBool(NULL, "BlockInterferePower", FALSE)) {
+		SetLastError(ERROR_ACCESS_DENIED);
+		return 0;
+	}
+	return __sys_ShutdownBlockReasonCreate(hWnd, pwszReason);
+}
+_FX EXECUTION_STATE Gui_SetThreadExecutionState(
+	EXECUTION_STATE esFlags
+) {
+	if (SbieApi_QueryConfBool(NULL, "BlockInterferePower", FALSE)) {
+		SetLastError(ERROR_ACCESS_DENIED);
+		return 0;
+	}
+	return __sys_SetThreadExecutionState(esFlags);
+}