better handling of activate/deactivate window

hw3d/Window.cpp

@@ -254,11 +254,13 @@ LRESULT Window::HandleMsg( HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam ) noex
 			{
 				OutputDebugString( "activeate => confine\n" );
 				ConfineCursor();
+				HideCursor();
 			}
 			else
 			{
 				OutputDebugString( "activeate => free\n" );
 				FreeCursor();
+				ShowCursor();
 			}
 		}
 		break;
@@ -345,6 +347,12 @@ LRESULT Window::HandleMsg( HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam ) noex
 	case WM_LBUTTONDOWN:
 	{
 		SetForegroundWindow( hWnd );
+		if( !cursorEnabled )
+		{
+			OutputDebugString( "lclick => recapture\n" );
+			ConfineCursor();
+			HideCursor();
+		}
 		// stifle this mouse message if imgui wants to capture
 		if( imio.WantCaptureMouse )
 		{