Set focus on service start/stop button only when window is visible

Fixes #34

Author: redddcyclone

CHANGES

@@ -1,5 +1,13 @@
 Revision history for GLPI Agent Monitor
 
+Future version
+
+* Fixed a bug where pressing the Space or Enter/Return keys during a restart
+  of the Agent service can cause the Start/Stop service button to be pressed
+  even when the Monitor window is not visible, triggering a UAC prompt if the
+  user is not an administrator.
+  
+
 1.4.0
 
 * Dutch translation added

GLPI-AgentMonitor.cpp

@@ -1,7 +1,7 @@
 /*
  *  ---------------------------------------------------------------------------
  *  GLPI-AgentMonitor.cpp
- *  Copyright (C) 2023, 2024 Leonardo Bernardes (redddcyclone)
+ *  Copyright (C) 2023, 2025 Leonardo Bernardes (redddcyclone)
  *  ---------------------------------------------------------------------------
  * 
  *  LICENSE
@@ -441,7 +441,9 @@ VOID CALLBACK UpdateServiceStatus(HWND hWnd, UINT message, UINT idTimer, DWORD d
 
         HWND hWndSvcButton = GetDlgItem(hWnd, IDC_BTN_STARTSTOPSVC);
         EnableWindow(hWndSvcButton, bEnableButton);
-        SetFocus(hWndSvcButton);
+        if (IsWindowVisible(hWnd)) {
+            SetFocus(hWndSvcButton);
+        }
 
         // Taskbar icon routine
         if (svcStatus.dwCurrentState != SERVICE_RUNNING)