Fixed the crash problem when multiple Rainmeter instances are running and "show desktop" occured.

Library/Rainmeter.cpp

@@ -1472,6 +1472,22 @@ CMeterWindow* CRainmeter::GetMeterWindow(const std::wstring& config)
 
 	return NULL;
 }
+
+CMeterWindow* CRainmeter::GetMeterWindow(HWND hwnd)
+{
+	std::map<std::wstring, CMeterWindow*>::iterator iter = m_Meters.begin();
+
+	for (; iter != m_Meters.end(); iter++)
+	{
+		if ((*iter).second->GetWindow() == hwnd)
+		{
+			return (*iter).second;
+		}
+	}
+
+	return NULL;
+}
+
 /* 
 ** Quit
 **

Library/Rainmeter.h

@@ -112,6 +112,7 @@ public:
 	CTrayWindow* GetTrayWindow() { return m_TrayWindow; };
 
 	CMeterWindow* GetMeterWindow(const std::wstring& config);
+	CMeterWindow* GetMeterWindow(HWND hwnd);
 	std::map<std::wstring, CMeterWindow*>& GetAllMeterWindows() { return m_Meters; };
 	const std::vector<CONFIG>& GetAllConfigs() { return m_ConfigStrings; };
 	const std::vector<std::wstring>& GetAllThemes() { return m_Themes; };

Library/System.cpp

@@ -581,7 +581,8 @@ BOOL CALLBACK MyEnumWindowsProc(HWND hwnd, LPARAM lParam)
 
 	if (GetClassName(hwnd, className, 128) > 0 &&
 		wcscmp(className, L"RainmeterMeterWindow") == 0 &&
-		(Window = (CMeterWindow*)GetProp(hwnd, L"RAINMETER")))
+		Rainmeter &&
+		(Window = Rainmeter->GetMeterWindow(hwnd)))
 	{
 		if (Window->GetWindowZPosition() == ZPOSITION_ONDESKTOP)
 		{